Lincoln Corsair Manuals

Lincoln Corsair: Automatic Transmission External Controls - 8-Speed Automatic Transmission – 8F35/8F40 / Diagnosis and Testing - External Controls

Lincoln Corsair 2020-2024 Service Manual / Powertrain / Automatic Transmission / Automatic Transmission External Controls - 8-Speed Automatic Transmission – 8F35/8F40 / Diagnosis and Testing - External Controls

Diagnostic Trouble Code (DTC) Chart

Diagnostics in this manual assume a certain skill level and knowledge of Ford-specific diagnostic practices.
REFER to: Diagnostic Methods (100-00 General Information, Description and Operation).


Module DTC Description Action
GSM P0562:00 System Voltage Low: No Sub Type Information GO to Pinpoint Test A
GSM P0563:00 System Voltage High: No Sub Type Information GO to Pinpoint Test B
GSM P0605:00 Internal Control Module Read Only Memory (ROM) Error: No Sub Type Information GO to Pinpoint Test K
GSM P0606:00 Control Module Processor: No Sub Type Information GO to Pinpoint Test K
GSM P0607:00 Control Module Performance: No Sub Type Information GO to Pinpoint Test K
GSM P06B8:00 Internal Control Module Non-Volatile Random Access Memory (NVRAM) Error: No Sub Type Information GO to Pinpoint Test K
GSM P07EC:00 Transmission Range Multi-Function Select Circuit: No Sub Type Information GO to Pinpoint Test I
GSM P07ED:00 Transmission Range Multi-Function Select Circuit Stuck: No Sub Type Information GO to Pinpoint Test I
GSM P0814:00 Transmission Range Display Circuit: No Sub Type Information GO to Pinpoint Test H
GSM P164E:00 Internal Control Module Transmission Range Select Performance: No Sub Type Information GO to Pinpoint Test K
GSM P166B:00 Drivers Door Status Correlation: No Sub Type Information GO to Pinpoint Test G
GSM U0100:00 Lost Communication With ECM/PCM 'A': No Sub Type Information GO to Pinpoint Test F
GSM U0100:87 Lost Communication With ECM/PCM 'A': Missing Message GO to Pinpoint Test F
GSM U0121:00 Lost Communication With Anti-Lock Brake System (ABS) Control Module 'A': No Sub Type Information GO to Pinpoint Test E
GSM U0140:00 Lost Communication With Body Control Module: No Sub Type Information GO to Pinpoint Test D
GSM U0155:00 Lost Communication With Instrument Panel Cluster (IPC) Control Module: No Sub Type Information GO to Pinpoint Test C
GSM U0301:00 Software Incompatibility with ECM/PCM: No Sub Type Information GO to Pinpoint Test L
GSM U0401:00 Invalid Data Received from ECM/PCM A: No Sub Type Information GO to Pinpoint Test F
GSM U0422:00 Invalid Data Received From Body Control Module: No Sub Type Information GO to Pinpoint Test D
GSM U1011:00 Invalid Internal Control Module Monitoring Data Received from ECM/PCM: No Sub Type Information GO to Pinpoint Test F
GSM U101F:00 Invalid Internal Control Module Monitoring Data Received from Transmission Range Control Module: No Sub Type Information GO to Pinpoint Test F

Global Customer Symptom Code (GCSC) Chart

Diagnostics in this manual assume a certain skill level and knowledge of Ford-specific diagnostic practices.
REFER to: Diagnostic Methods (100-00 General Information, Description and Operation).


Symptom Action
Start/Run/Move > Moving > Gear Selector > Inoperative GO to Pinpoint Test J
Start/Run/Move > Moving > Engagement Quality > Park GO to Pinpoint Test M
Start/Run/Move > Moving > Engagement Quality > Park GO to Pinpoint Test O
Start/Run/Move > Moving > Engagement Quality > Park GO to Pinpoint Test P

Symptom Chart

Diagnostics in this manual assume a certain skill level and knowledge of Ford-specific diagnostic practices.
REFER to: Diagnostic Methods (100-00 General Information, Description and Operation).

In most circumstances the GSM sets a DTC to help guide with diagnostics. Refer to the DTC Chart before using the Symptom Chart. The Condition column lists the vehicle condition. The Action column refers to a pinpoint test. Each pinpoint test lists the components that can cause the symptom and the action to take to diagnose that system. The components are listed in order of disassembly. Use the list of components and the required action to focus on disassembly inspections for the root cause of the concern.

Symptom Action
Transmission stuck in park position (Park by wire)   GO to Pinpoint Test M
Transmission returns to park automatically   GO to Pinpoint Test N
Transmission does not return to park when the door is opened   GO to Pinpoint Test O
Transmission stuck in drive   GO to Pinpoint Test P
Paddle shift does not operate correctly   GO to Pinpoint Test J

Pinpoint Tests


PINPOINT TEST A: P0562:00

Refer to Wiring Diagrams Cell 29 for schematic and connector information.

Normal Operation and Fault Conditions

The GSM requires an operating voltage between 9 and 16 volts. The GSM receives this voltage from the BCM and has a dual ground circuit. Excessive resistance or an open in one or more of these circuits, a discharged battery or a inoperative charging system results in the GSM setting a DTC .

DTC Fault Trigger Conditions

DTC Description Fault Trigger Condition
GSM P0562:00 System Voltage Low: No Sub Type Information This DTC sets in continuous memory if the voltage supplied to the GSM falls below 9 volts for more than 3 seconds.

Possible Sources

  • BCM fuse 21 (7.5A)
  • Wiring, terminals or connectors
  • GSM
A1 RECHECK THE GSM (GEAR SHIFT MODULE) DIAGNOSTIC TROUBLE CODES (DTCS)

NOTE: If a GSM self-test is performed, the driver door must be fully closed. A false P166B DTC can set if the driver door is not fully closed during the self-test.

  • Using a diagnostic scan tool, clear the GSM DTC s.
  • Ignition OFF.
  • Ignition ON.
  • Using a diagnostic scan tool, carry out the GSM self-test.

Is DTC P0562 still present?
Yes GO to A2
No The system is operating correctly at this time. The DTC may have set due to a previous low battery voltage condition.

A2 CHECK FOR CHARGING SYSTEM DIAGNOSTIC TROUBLE CODES (DTCS) IN THE PCM (POWERTRAIN CONTROL MODULE)
  • Using a diagnostic scan tool, retrieve all CMDTC s from the PCM .

Are any charging system Diagnostic Trouble Codes (DTCs) present in the PCM ?
Yes DIAGNOSE the vehicle charging concern.
REFER to: Charging System - 2.0L EcoBoost (177kW/240PS) – MI4/2.3L EcoBoost (199kW/270PS) (414-00 Charging System - General Information, Diagnosis and Testing).
No GO to A3

A3 CHECK THE BATTERY CONDITION AND STATE OF CHARGE
  • Carry out the Battery Condition Test.
    REFER to: Battery (414-01 Battery, Mounting and Cables, Diagnosis and Testing).

Did the battery pass the condition test?
Yes GO to A4
No INSTALL a new battery.
REFER to: Battery (414-01 Battery, Mounting and Cables, Removal and Installation).

A4 CHECK THE GSM (GEAR SHIFT MODULE) VOLTAGE SUPPLY
  • Ignition OFF.
  • Disconnect GSM C3245.
  • Ignition ON.
  • Measure:
    Click to display connectors
    Positive Lead Measurement / Action Negative Lead
      C3245-1   Ground

Is the voltage within 1 volt of the recorded battery voltage?
Yes GO to A5
No VERIFY BCM fuse 21(7.5A) is OK.
If OK, REPAIR the affected circuit for high resistance or an open.
If not OK, REFER to the Wiring Diagrams manual to identify the cause of the circuit short.

A5 CHECK THE GSM (GEAR SHIFT MODULE) GROUND CIRCUIT FOR AN OPEN
  • Ignition OFF.
  • Measure:
    Click to display connectors
    Positive Lead Measurement / Action Negative Lead
      C3245-9   Ground
      C3245-18   Ground

Is the resistance less than 3 ohms?
Yes GO to A6
No Verify ground G200 is clean and properly fastened. If OK, REPAIR the circuit.

A6 VERIFY ALL WIRING CONNECTIONS
  • Disconnect and inspect GSM C3245 and all related in-line electrical connectors.
  • Using a good light source, inspect all disconnected electrical connectors for the following:
    • corrosion - install new connector or terminal and clean the module pins
    • damaged or bent pins - install new terminals or pins
    • pushed-out pins - install new pins as necessary
    • spread terminals - install new terminals as necessary
  • Reconnect GSM C3245 and all related in-line electrical connectors. Make sure they seat and latch correctly.
  • Operate the system and determine if the concern is still present.

Is the concern still present?
Yes CHECK OASIS for any applicable service articles: TSB , GSB (general service bulletin), SSM (special service message) or FSA (Field Service Action). If a service article exists for this concern, DISCONTINUE this test and FOLLOW the service article instructions. If no service articles address this concern, INSTALL a new GSM .
REFER to: Gear Shift Module (GSM) (307-05A Automatic Transmission External Controls - 8-Speed Automatic Transmission – 8F35/8F40, Removal and Installation).
No The system is operating correctly at this time. The concern may have been caused by a loose or corroded connector. ADDRESS the root cause of any connector or pin issues.

PINPOINT TEST B: P0563

Refer to Wiring Diagrams Cell 29 for schematic and connector information.

Normal Operation and Fault Conditions

The GSM requires an operating voltage between 9 and 16 volts. The GSM receives this voltage from the BCM and has a dual ground circuit. Excessive resistance or an open in one or more of these circuits, a discharged battery or a inoperative charging system results in the GSM setting a DTC .

An overcharging condition in the charging system results in the GSM setting a DTC . This DTC may also set in the GSM due to battery charging or vehicle jump starting events.

DTC Fault Trigger Conditions

DTC Description Fault Trigger Condition
GSM P0563:00 System Voltage High: No Sub Type Information This DTC sets in continuous memory if the voltage supplied to the GSM is above 16 volts for more than 3 seconds.

Possible Sources

  • Charging system concern
  • GSM
B1 CHECK FOR HIGH VOLTAGE DTCS SET IN OTHER MODULES
  • Using a diagnostic scan tool, retrieve all CMDTC s.

Are any charging system Diagnostic Trouble Codes (DTCs) present in the PCM ?
Yes DIAGNOSE the vehicle charging concern.
REFER to: Charging System - 2.0L EcoBoost (177kW/240PS) – MI4/2.3L EcoBoost (199kW/270PS) (414-00 Charging System - General Information, Diagnosis and Testing).
No GO to B2

B2 CHECK THE BATTERY VOLTAGE
  • Turn off all interior lights, exterior lights and accessories.
  • NOTE: Do not allow the engine speed to increase above 2,000 RPM while performing this step or the generator may self-excite and result in default charging system output voltage. If engine speed goes above 2,000 RPM , turn the engine off and restart the engine before performing this step. Start and run the engine at approximately 1,500 RPM for 3 minutes while monitoring the battery voltage.

Is the battery voltage between 13 and 15.2 volts?
Yes GO to B3
No DIAGNOSE the vehicle charging concern.
REFER to: Charging System - 2.0L EcoBoost (177kW/240PS) – MI4/2.3L EcoBoost (199kW/270PS) (414-00 Charging System - General Information, Diagnosis and Testing).

B3 RECHECK THE GSM (GEAR SHIFT MODULE) FOR DTC (DIAGNOSTIC TROUBLE CODE) P0563

NOTE: If a GSM self-test is performed, the driver door must be fully closed. A false P166B DTC can set if the driver door is not fully closed during the self-test.

  • Ignition OFF.
  • Ignition ON.
  • Using a diagnostic scan tool, clear the GSM DTC s.
  • Ignition OFF.
  • Ignition ON.
  • Using a diagnostic scan tool, carry out the GSM self-test.

Is DTC P0563 still present?
Yes GO to B4
No The system is operating normally at this time. The DTC may have been set previously during battery charging or while jump starting the vehicle.

B4 VERIFY ALL WIRING CONNECTIONS
  • Ignition OFF.
  • Disconnect and inspect GSM C3245 and all related in-line electrical connectors.
  • Using a good light source, inspect all disconnected electrical connectors for the following:
    • corrosion - install new connector or terminal and clean the module pins
    • damaged or bent pins - install new terminals or pins
    • pushed-out pins - install new pins as necessary
    • spread terminals - install new terminals as necessary
  • Reconnect GSM C3245 and all related in-line electrical connectors. Make sure they seat and latch correctly.
  • Operate the system and determine if the concern is still present.

Is the concern still present?
Yes CHECK OASIS for any applicable service articles: TSB , GSB (general service bulletin), SSM (special service message) or FSA (Field Service Action). If a service article exists for this concern, DISCONTINUE this test and FOLLOW the service article instructions. If no service articles address this concern, INSTALL a new GSM .
REFER to: Gear Shift Module (GSM) (307-05A Automatic Transmission External Controls - 8-Speed Automatic Transmission – 8F35/8F40, Removal and Installation).
No The system is operating correctly at this time. The concern may have been caused by a loose or corroded connector. ADDRESS the root cause of any connector or pin issues.

PINPOINT TEST C: U0155

Refer to Wiring Diagrams Cell 14 for schematic and connector information.

Normal Operation and Fault Conditions

The IPC and GSM use information contained in HS-CAN messages.

DTC Fault Trigger Conditions

DTC Description Fault Trigger Condition
GSM U0155:00 Lost Communication With Instrument Panel Cluster (IPC) Control Module: No Sub Type Information This DTC sets if the GSM does not receive some or all of an expected message from the IPC .

Possible Sources

  • Communication concern
  • IPC
  • GSM
C1 CHECK THE COMMUNICATION NETWORK
  • Ignition ON.
  • Using the diagnostic scan tool, perform the network test.

Does the IPC pass the network test?
Yes GO to C2
No To diagnose the module does not respond to the scan tool,
REFER to: Communications Network (418-00 Module Communications Network, Diagnosis and Testing).

C2 CHECK FOR GSM (GEAR SHIFT MODULE) DIAGNOSTIC TROUBLE CODES (DTCS)

NOTE: If a GSM self-test is performed, the driver door must be fully closed. A false P166B DTC can set if the driver door is not fully closed during the self-test.

  • Clear all DTC s.
  • Using the diagnostic scan tool, perform the GSM self-test.

Is DTC U0155 present?
Yes GO to C3
No The system is operating correctly at this time. The DTC may have been set due to high network traffic or an intermittent fault condition.

C3 RETRIEVE THE RECORDED DIAGNOSTIC TROUBLE CODES (DTCS) FROM THE GSM (GEAR SHIFT MODULE) SELF-TEST
  • Check for DTC s from the self-test.

Are any non-network GSM DTC s present?
Yes RESOLVE all non-network DTC s first. REFER to the GSM DTC chart.
No GO to C4

C4 RETRIEVE THE RECORDED DIAGNOSTIC TROUBLE CODES (DTCS) FROM THE IPC (INSTRUMENT PANEL CLUSTER)
  • Using the diagnostic scan tool, perform the IPC self-test.
  • Check for DTC s from the self-test.

Is DTC U3000 present?
Yes
REFER to: Instrumentation, Message Center and Warning Chimes - Vehicles With: Head Up Display (HUD) (413-01 Instrumentation, Message Center and Warning Chimes, Diagnosis and Testing).
No GO to C5

C5 CHECK FOR DTC (DIAGNOSTIC TROUBLE CODE) U0155 SET IN OTHER MODULES
  • Using the diagnostic scan tool, perform the self-test for all modules.
  • Retrieve the DTC s from all modules.

Is DTC U0155 present in the PCM or SCCM ?
Yes CHECK OASIS for any applicable service articles: TSB , GSB (general service bulletin), SSM (special service message) or FSA (Field Service Action). If a service article exists for this concern, DISCONTINUE this test and FOLLOW the service article instructions. If no service articles address this concern, INSTALL a new IPC . INSTALL a new IPC. Refer to the appropriate Removal and Installation procedure in Section 413-01.
No If the only reporting module is the GSM , CHECK OASIS for any applicable TSB s. If a TSB exists for this concern, discontinue this test and follow TSB instructions. If no TSB s address this concern, INSTALL a new GSM .
REFER to: Gear Shift Module (GSM) (307-05A Automatic Transmission External Controls - 8-Speed Automatic Transmission – 8F35/8F40, Removal and Installation).
.

PINPOINT TEST D: U0140, U0422

Refer to Wiring Diagrams Cell 14 for schematic and connector information.

Normal Operation and Fault Conditions

The GSM and BCM use information contained in HS-CAN messages.

DTC Fault Trigger Conditions

DTC Description Fault Trigger Condition
GSM U0140:00 Lost Communication With Body Control Module: No Sub Type Information This DTC sets in continuous memory in the GSM if data messages received from the BCM are missing for 5 seconds or longer.
GSM U0422:00 Invalid Data Received From Body Control Module: No Sub Type Information This DTC sets if the GSM detects invalid data from the BCM .

Possible Sources

  • Communication concern
  • GSM
  • BCM
D1 VERIFY THE SCAN TOOL COMMUNICATES WITH THE BCM (BODY CONTROL MODULE)
  • Connect the diagnostic scan tool.
  • Check that a vehicle session can be established using the scan tool.

Can a vehicle session be established?
Yes GO to D2
No
REFER to: Communications Network (418-00 Module Communications Network, Diagnosis and Testing).

D2 CHECK THE GSM (GEAR SHIFT MODULE) CONTINUOUS MEMORY DIAGNOSTIC TROUBLE CODES (CMDTCS)

NOTE: If a GSM self-test is performed, the driver door must be fully closed. A false P166B DTC can set if the driver door is not fully closed during the self-test.

  • Ignition ON.
  • Using a diagnostic scan tool, perform the GSM self-test.
  • Clear the DTC s.
  • Wait 10 seconds.
  • Repeat the GSM self-test.

Are any non-network DTC s present?
Yes RESOLVE all non-network DTC s first. REFER to the GSM DTC chart.
No GO to D3

D3 PERFORM THE BCM (BODY CONTROL MODULE) SELF-TEST
  • Using a diagnostic scan tool, perform the BCM self-test.

Are any non-network Diagnostic Trouble Codes (DTCs) present?
Yes RESOLVE all non-network DTC s first.
REFER to: Body Control Module (BCM) (419-10 Multifunction Electronic Modules, Diagnosis and Testing).
No GO to D4

D4 CHECK THE GWM (GATEWAY MODULE A) DIAGNOSTIC TROUBLE CODES (DTCS)
  • Using a diagnostic scan tool, retrieve all GWM CMDTC s.

Are any DTC s set?
Yes
REFER to: Communications Network (418-00 Module Communications Network, Diagnosis and Testing).
No GO to D5

D5 RECHECK THE GSM (GEAR SHIFT MODULE) DIAGNOSTIC TROUBLE CODES (DTCS)

NOTE: If a GSM self-test is performed, the driver door must be fully closed. A false P166B DTC can set if the driver door is not fully closed during the self-test.

  • Using a diagnostic scan tool, clear the GSM DTC s.
  • Ignition OFF.
  • Ignition ON.
  • Wait 10 seconds.
  • Using a diagnostic scan tool, perform the continuous memory self-test.
  • Check the GSM DTC s.

Is DTC U0140, U0422 still present?
Yes GO to D6
No The system is operating correctly at this time. The DTC may have set due to high network traffic or an intermittent fault condition.

D6 CHECK FOR OTHER CAUSES OF COMMUNICATION NETWORK CONCERNS

NOTE: If new modules were installed prior to the DTC being set, the module configuration can be incorrectly set during the PMI or the PMI may not have been carried out.

  • CHECK the vehicle service history for recent service actions related to the BCM or GSM . If recent service history is found:
    • verify correct replacement module was installed
      • HVBOM may be used to verify correct part application
    • verify the configuration of replacement module was correct
      • re-configure module using as-built data if prior configuration is suspect
    • verify the module was not obtained from a like vehicle and installed into customer vehicle
      • return the swapped module to source vehicle and obtain new replacement module
  • Operate the system and determine if the observable symptom is still present.

Is the observable symptom still present?
Yes GO to D7
No The system is operating correctly at this time. The concern may have been due to incorrect parts replacement procedures or incorrect module configuration.

D7 CHECK FOR CORRECT BCM (BODY CONTROL MODULE) OPERATION
  • Ignition OFF.
  • Disconnect and inspect the BCM and all related in-line connectors.
  • Using a good light source, inspect all disconnected electrical connectors for the following:
    • corrosion - install new connector or terminal and clean the module pins
    • damaged or bent pins - install new terminals or pins
    • pushed-out pins - install new pins as necessary
    • spread terminals - install new terminals as necessary
  • Reconnect the BCM and all related in-line connectors. Make sure they seat and latch correctly.
  • Operate the system and determine if the concern is still present.

Is the concern still present?
Yes CHECK OASIS for any applicable service articles: TSB , GSB (general service bulletin), SSM (special service message) or FSA (Field Service Action). If a service article exists for this concern, DISCONTINUE this test and FOLLOW the service article instructions. If no service articles address this concern, Click here to access Guided Routine, INSTALL a new BCM. Refer to the appropriate Removal and Installation procedure in Section 419-10.
No The system is operating correctly at this time. The concern may have been caused by module connections. ADDRESS the root cause of any connector or pin issues.

PINPOINT TEST E: U0121

Refer to Wiring Diagrams Cell 14 for schematic and connector information.

Normal Operation and Fault Conditions

The GSM and ABS module use information contained in HS-CAN messages.

DTC Fault Trigger Conditions

DTC Description Fault Trigger Condition
GSM U0121:00 Lost Communication With Anti-Lock Brake System (ABS) Control Module 'A': No Sub Type Information This DTC sets if the GSM does not receive some or all of an expected message from the ABS module.

Possible Sources

  • Communication concern
  • ABS module
  • GSM
E1 CHECK THE COMMUNICATION NETWORK
  • Ignition ON.
  • Using the diagnostic scan tool, perform the network test.

Does the ABS module pass the network test?
Yes GO to E2
No To diagnose the module does not respond to the scan tool,
REFER to: Communications Network (418-00 Module Communications Network, Diagnosis and Testing).

E2 CHECK FOR GSM (GEAR SHIFT MODULE) DIAGNOSTIC TROUBLE CODES (DTCS)

NOTE: If a GSM self-test is performed, the driver door must be fully closed. A false P166B DTC can set if the driver door is not fully closed during the self-test.

  • Clear all DTC s.
  • Using the diagnostic scan tool, perform the GSM self-test.

Is DTC U0121 present?
Yes GO to E3
No The system is operating correctly at this time. The DTC may have been set due to high network traffic or an intermittent fault condition.

E3 RETRIEVE THE RECORDED DIAGNOSTIC TROUBLE CODES (DTCS) FROM THE GSM (GEAR SHIFT MODULE) SELF-TEST
  • Check for DTC s from the self-test.

Are any non-network GSM DTC s present?
Yes RESOLVE all non-network DTC s first. REFER to the GSM DTC chart.
No GO to E4

E4 PERFORM THE ABS (ANTI-LOCK BRAKE SYSTEM) MODULE SELF-TEST
  • Using a diagnostic scan tool, perform the ABS module self-test.

Are any non-network DTC s present?
Yes RESOLVE all non-network DTC s first.
REFER to: Anti-Lock Brake System (ABS) and Stability Control (206-09 Anti-Lock Brake System (ABS) and Stability Control, Diagnosis and Testing).
No GO to E5

E5 CHECK FOR DTC (DIAGNOSTIC TROUBLE CODE) U0121 SET IN OTHER MODULES
  • Using the diagnostic scan tool, perform the self-test for all modules.
  • Retrieve the DTC s from all modules.

Is DTC U0121 present in other modules?
Yes CHECK OASIS for any applicable service articles: TSB , GSB (general service bulletin), SSM (special service message) or FSA (Field Service Action). If a service article exists for this concern, DISCONTINUE this test and FOLLOW the service article instructions. If no service articles address this concern, Click here to access Guided Routine,
   VIN required to access Guided Routine (ABS)
No If the only reporting module is the GSM , CHECK OASIS for any applicable TSB s. If a TSB exists for this concern, discontinue this test and follow TSB instructions. If no TSB s address this concern, INSTALL a new GSM .
REFER to: Gear Shift Module (GSM) (307-05A Automatic Transmission External Controls - 8-Speed Automatic Transmission – 8F35/8F40, Removal and Installation).
.

PINPOINT TEST F: U0100, U0401, U1011, U101F

Refer to Wiring Diagrams Cell 14 for schematic and connector information.

Normal Operation and Fault Conditions

The GSM and PCM use information contained in CAN and HS-CAN2 messages.

DTC Fault Trigger Conditions

DTC Description Fault Trigger Condition
GSM U0100:00 Lost Communication With ECM/PCM 'A': No Sub Type Information This DTC sets if the GSM does not receive some or all of an expected message from the PCM over HS-CAN2 .
GSM U0100:87 Lost Communication With ECM/PCM 'A': Missing Message This DTC sets if the GSM does not receive some or all of an expected message from the PCM over Private/Powertrain CAN .
GSM U0401:00 Invalid Data Received from ECM/PCM A: No Sub Type Information This DTC sets if the GSM detects invalid data from the PCM .
GSM U1011:00 Invalid Internal Control Module Monitoring Data Received from ECM/PCM: No Sub Type Information This DTC sets if the GSM detects invalid internal control module monitoring data from the PCM over HS-CAN2 .
GSM U101F:00 Invalid Internal Control Module Monitoring Data Received from Transmission Range Control Module: No Sub Type Information This DTC sets if the GSM detects invalid internal control module monitoring data from the PCM over CAN .

Possible Sources

  • Communication concern
  • PCM
  • GSM
F1 CHECK THE COMMUNICATION NETWORK
  • Ignition ON.
  • Using the diagnostic scan tool, perform the network test.

Does the PCM pass the network test?
Yes GO to F2
No To diagnose the module does not respond to the scan tool,
REFER to: Communications Network (418-00 Module Communications Network, Diagnosis and Testing).

F2 CHECK FOR GSM (GEAR SHIFT MODULE) DIAGNOSTIC TROUBLE CODES (DTCS)

NOTE: If a GSM self-test is performed, the driver door must be fully closed. A false P166B DTC can set if the driver door is not fully closed during the self-test.

  • Clear all DTC s.
  • Using the diagnostic scan tool, perform the GSM self-test.

Is DTC U0100, U0401, U1011 present?
Yes GO to F3
No The system is operating correctly at this time. The DTC may have been set due to high network traffic or an intermittent fault condition.

F3 RETRIEVE THE RECORDED DIAGNOSTIC TROUBLE CODES (DTCS) FROM THE GSM (GEAR SHIFT MODULE) SELF-TEST
  • Check for DTC s from the self-test.

Are any non-network GSM DTC s present?
Yes RESOLVE all non-network DTC s first. REFER to the GSM DTC chart.
No GO to F4

F4 RETRIEVE THE RECORDED DIAGNOSTIC TROUBLE CODES (DTCS) FROM THE PCM (POWERTRAIN CONTROL MODULE)
  • Using the diagnostic scan tool, perform the PCM self-test.
  • Check for DTC s from the self-test.

Are DTC s P0562, P0563 and/or P1397 present?
Yes RESOLVE these DTC s first.
REFER to: Electronic Engine Controls (303-14A Electronic Engine Controls - 2.0L EcoBoost (177kW/240PS) – MI4, Diagnosis and Testing).
REFER to: Electronic Engine Controls (303-14B Electronic Engine Controls - 2.3L EcoBoost (199kW/270PS), Diagnosis and Testing).
No GO to F5

F5 CHECK FOR DTC (DIAGNOSTIC TROUBLE CODE) U0100, U0401, U1011, U101F SET IN OTHER MODULES
  • Using the diagnostic scan tool, perform the self-test for all modules.
  • Retrieve the DTC s from all modules.

Is DTC U0100, U0401, U1011, U101F present in other modules?
Yes CHECK OASIS for any applicable service articles: TSB , GSB (general service bulletin), SSM (special service message) or FSA (Field Service Action). If a service article exists for this concern, DISCONTINUE this test and FOLLOW the service article instructions. If no service articles address this concern,
   VIN required to access Guided Routine (PCM)
No For DTC U0100:00 and/or U0401, GO to F6
For DTC U0100:87, GO to F8
For DTC U1011 and/or U101F, GO to F10

F6 CHECK THE HS-CAN2 (HIGH-SPEED CONTROLLER AREA NETWORK 2) CIRCUITS FOR AN OPEN
  • Ignition OFF.
  • Disconnect GSM C3245 .
  • Disconnect Gateway Module AC2431 .
  • Inspect the connectors for damaged or pushed-out terminals.
  • Measure:
    Click to display connectors
    Positive Lead Measurement / Action Negative Lead
      C3245-3   C2431-18
      C3245-2   C2431-17

Are the resistances less than 3 ohms?
Yes GO to F7
No REPAIR the circuit.

F7 CHECK THE HS-CAN2 (HIGH-SPEED CONTROLLER AREA NETWORK 2) CIRCUITS FOR A SHORT TO GROUND
  • Measure:
    Click to display connectors
    Positive Lead Measurement / Action Negative Lead
      C3245-3   Ground
      C3245-2   Ground

Are the resistances greater than 10,000 ohms?
Yes GO to F10
No REPAIR the circuit.

F8 CHECK THE CAN (CONTROLLER AREA NETWORK) CIRCUITS FOR AN OPEN
  • Ignition OFF.
  • Disconnect GSM C3245 .
  • Disconnect PCM C1551B .
  • Inspect the connectors for damaged or pushed-out terminals.
  • Measure:
    Click to display connectors
    Positive Lead Measurement / Action Negative Lead
      C3245-14   C1551B-46
      C3245-13   C1551B-65

Are the resistances less than 3 ohms?
Yes GO to F9
No REPAIR the circuit.

F9 CHECK THE CAN (CONTROLLER AREA NETWORK) CIRCUITS FOR A SHORT TO GROUND
  • Measure:
    Click to display connectors
    Positive Lead Measurement / Action Negative Lead
      C3245-14   Ground
      C3245-13   Ground

Are the resistances greater than 10,000 ohms?
Yes GO to F10
No REPAIR the circuit.

F10 CHECK FOR CORRECT GSM (GEAR SHIFT MODULE) OPERATION
  • Ignition OFF.
  • Disconnect and inspect GSM C3532 and all related in-line electrical connectors.
  • Using a good light source, inspect all disconnected electrical connectors for the following:
    • corrosion - install new connector or terminal and clean the module pins
    • damaged or bent pins - install new terminals or pins
    • pushed-out pins - install new pins as necessary
    • spread terminals - install new terminals as necessary
  • Reconnect GSM C3532 and all related in-line electrical connectors. Make sure they seat and latch correctly.
  • Using the diagnostic scan tool, clear all DTC s.
  • Perform the GSM self-test.

Are any diagnostic trouble codes (DTCs) present?
Yes For DTC U0100:00, U0100:87 and/or U0401, CHECK OASIS for any applicable service articles: TSB , GSB (general service bulletin), SSM (special service message) or FSA (Field Service Action). If a service article exists for this concern, DISCONTINUE this test and FOLLOW the service article instructions. If no service articles address this concern, INSTALL a new GSM .
REFER to: Gear Shift Module (GSM) (307-05A Automatic Transmission External Controls - 8-Speed Automatic Transmission – 8F35/8F40, Removal and Installation). For DTC U1011 and/or U101F, REPROGRAM the PCM with the latest software.
REFER to: Module Programming (418-01 Module Configuration, General Procedures).
PERFORM the transmission strategy download. REFER to: Transmission Strategy Download (307-01A Automatic Transmission - 8-Speed Automatic Transmission – 8F35/8F40, General Procedures).
CLEAR the diagnostic trouble codes (DTCs). If DTC U1011 and/or U101F returns,
   VIN required to access Guided Routine (PCM)
No The system is operating correctly at this time. The concern may have been caused by a loose or corroded connector. ADDRESS the root cause of any connector or pin issues.

PINPOINT TEST G: P166B

Refer to Wiring Diagrams Cell 29 for schematic and connector information.

Normal Operation and Fault Conditions

The GSM monitors two driver door ajar switches to shift the transmission into the PARK position when the operator is preparing to exit the vehicle.

DTC Fault Trigger Conditions

DTC Description Fault Trigger Condition
GSM P166B:00 Drivers Door Status Correlation: No Sub Type Information The GSM monitors the voltage signals on the two driver door ajar switch inputs. This DTC sets if these inputs fail a rational test between them.

Possible Sources

  • Connectors damaged or pushed-out terminals, circuitry open, shorted to power or shorted to ground
  • Driver door ajar switch 1
  • Driver door ajar switch 2
  • GSM
G1 RUN GSM SELF-TEST AND RETRIEVE AND RECORD ALL DTCS

NOTE: If a GSM self-test is performed, the driver door must be fully closed. A false P166B DTC can set if the driver door is not fully closed during the self-test.

  • Using the diagnostic scan tool, clear all DTC s.
  • Ignition OFF.
  • Wait 10 seconds.
  • Ignition ON.
  • Using the diagnostic scan tool, run the GSM self-test and retrieve all DTC s.

Is DTC P166B present?
Yes GO to G2
No The system is operating correctly at this time. The DTC might have been set by performing a self-test without the door being fully closed.

G2 CHECK THE OPERATION OF THE DOOR AJAR WARNING SYSTEM
  • Ignition ON.
  • Open and close the driver door while observing the door ajar icon on the IPC .

Does the door ajar icon on the IPC toggle on and off appropriately as the driver door is opened and closed?
Yes GO to G3
No RESOLVE the door latch issue first.
REFER to: Locks, Latches and Entry Systems (501-14 Handles, Locks, Latches and Entry Systems, Diagnosis and Testing).

G3 MONITOR THE DOOR AJAR PARAMETER IDENTIFICATIONS (PIDS)
  • NOTE: This vehicle uses a second hardwired door ajar circuit in place of a door unlock circuit. PID DR_UNLCK_HWI is used to monitor the second hardwired door ajar circuit. Using the diagnostic scan tool, monitor the GSM PID s DR_AJAR_HWI and DR_UNLCK_HWI while opening and closing the driver door.

Do both PID s toggle appropriately as the driver door is opened and closed?
Yes GO to G7
No GO to G4

G4 CHECK THE DOOR AJAR CIRCUITS FOR AN OPEN
  • Ignition OFF.
  • Disconnect GSM C3245 .
  • Disconnect BCM C2280F .
  • Disconnect LH Front Door Latch C525A .
  • Disconnect LH Front Door Latch C525B .
  • Inspect the connectors for damaged or pushed-out terminals.
  • Measure:
    Click to display connectors
    Positive Lead Measurement / Action Negative Lead
      C3245-15   C525A-6
      C3245-4   C525B-1

Are the resistances less than 3 ohms?
Yes GO to G5
No REPAIR the circuit.

G5 CHECK THE DOOR AJAR CIRCUITS FOR A SHORT TO GROUND
  • Measure:
    Click to display connectors
    Positive Lead Measurement / Action Negative Lead
      C3245-4   Ground
      C3245-15   Ground

Are the resistances greater than 10,000 ohms?
Yes GO to G6
No REPAIR the circuit.

G6 CHECK THE DOOR AJAR CIRCUITS FOR A SHORT TO POWER
  • Ignition ON.
  • Measure:
    Click to display connectors
    Positive Lead Measurement / Action Negative Lead
      C3245-4   Ground
      C3245-15   Ground

Is any voltage present?
Yes REPAIR the circuit.
No GO to G7

G7 VERIFY THE GSM FAULT

NOTE: If a GSM self-test is performed, the driver door must be fully closed. A false P166B DTC can set if the driver door is not fully closed during the self-test.

  • Ignition OFF.
  • Connect BCM C2280F .
  • Connect LH Front Door Latch C525A .
  • Connect LH Front Door Latch C525B .
  • Connect GSM C3245 .
  • Ignition ON.
  • Using the diagnostic scan tool, run the GSM self-test and retrieve all DTC s.

Is DTC P166B still present?
Yes INSTALL a new GSM .
REFER to: Gear Shift Module (GSM) (307-05A Automatic Transmission External Controls - 8-Speed Automatic Transmission – 8F35/8F40, Removal and Installation).
No The system is operating correctly at this time.

PINPOINT TEST H: P0814

Refer to Wiring Diagrams Cell 29 for schematic and connector information.

Normal Operation and Fault Conditions

The GSM monitors the illumination of the gear selector LEDs. If it senses that the wrong LED is illuminated, it sets a DTC .

DTC Fault Trigger Conditions

DTC Description Fault Trigger Condition
GSM P0814:00 Transmission Range Display Circuit: No Sub Type Information This CMDTC sets if the GSM detects the illumination of the wrong gear indicator LED.

Possible Sources

  • Connectors damaged or pushed-out terminals, circuitry open or high resistance in the voltage feed wiring to the GSM or a loose ground.
  • Discharged battery/charging system
  • GSM
H1 VERIFY THE BATTERY IS FULLY CHARGED
  • NOTE: If necessary connect the battery charger to the vehicle battery to make sure there is a steady battery voltage while performing this test. Verify the battery is fully charged before proceeding with this test.
    REFER to: Battery (414-01 Battery, Mounting and Cables, Diagnosis and Testing).

Is the battery fully charged?
Yes GO to H2
No CHARGE or INSTALL a new battery if necessary.
REFER to: Battery (414-01 Battery, Mounting and Cables, Removal and Installation).

H2 CHECK GSM CALIBRATION LEVEL
  • Ignition ON.
  • Using a diagnostic scan tool, verify the GSM calibration is at the latest level.

Is the GSM calibration at the latest level?
Yes GO to H3
No
REFER to: Module Programming (418-01 Module Configuration, General Procedures).

H3 CHECK THE GSM (GEAR SHIFT MODULE) CONTINUOUS MEMORY DTC (DIAGNOSTIC TROUBLE CODE) S

NOTE: If a GSM self-test is performed, the driver door must be fully closed. A false P166B DTC can set if the driver door is not fully closed during the self-test.

  • Using a diagnostic scan tool, perform the GSM self-test.
  • Clear the CMDTC s.
  • Ignition OFF.
  • Ignition ON.
  • Wait 10 seconds.
  • Repeat the GSM self-test.

Is DTC P0814 present?
Yes If DTC P0562 or P0563 is also present, GO to H4 Otherwise, GO to H6
No The fault is not currently present and may have been caused by a previous low voltage occurrence.

H4 CHECK POWER CIRCUIT TO GSM FOR AN OPEN
  • Ignition OFF.
  • Disconnect GSM C3245 .
  • Ignition ON.
  • Measure:
    Click to display connectors
    Positive Lead Measurement / Action Negative Lead
      C3245-1   Ground

Is the voltage within 1 volt of the recorded battery voltage?
Yes GO to H5
No CHECK BCM fuse 21 (7.5A). If OK REPAIR the open circuit. If not OK, REFER to the wiring diagram manual to diagnose the short circuit.

H5 CHECK GSM GROUND FOR AN OPEN
  • Ignition OFF.
  • NOTE: Inspect the ground G200 eyelet and verify it is clean and tight. Measure:
    Click to display connectors
    Positive Lead Measurement / Action Negative Lead
      C3245-18   Ground
      C3245-9   Ground

Is the resistance less than 3 ohms?
Yes GO to H6
No REPAIR the circuit.

H6 CHECK FOR CORRECT GSM (GEAR SHIFT MODULE) OPERATION
  • Ignition OFF.
  • Disconnect and inspect GSM C3245 and all related in-line electrical connectors.
  • Using a good light source, inspect all disconnected electrical connectors for the following:
    • corrosion - install new connector or terminal and clean the module pins
    • damaged or bent pins - install new terminals or pins
    • pushed-out pins - install new pins as necessary
    • spread terminals - install new terminals as necessary
  • Reconnect GSM C3245 and all related in-line electrical connectors. Make sure they seat and latch correctly.
  • Operate the system and determine if the concern is still present.

Is the concern still present?
Yes CHECK OASIS for any applicable service articles: TSB , GSB (general service bulletin), SSM (special service message) or FSA (Field Service Action). If a service article exists for this concern, DISCONTINUE this test and FOLLOW the service article instructions. If no service articles address this concern, INSTALL a new GSM .
REFER to: Gear Shift Module (GSM) (307-05A Automatic Transmission External Controls - 8-Speed Automatic Transmission – 8F35/8F40, Removal and Installation).
No The system is operating correctly at this time. The concern may have been caused by module connections. ADDRESS the root cause of any connector or pin issues.

PINPOINT TEST I: 07EC, P07ED

Refer to Wiring Diagrams Cell 29 for schematic and connector information.

Normal Operation and Fault Conditions

The gear select buttons (P, R, N, D) each contain 3 internal contact switches. When a button is pressed, the 3 switches send a signal to the GSM. The GSM sets a DTC if it detects that one of the switches does not match the other 2, or if it detects that a button is stuck.

DTC Fault Trigger Conditions

DTC Description Fault Trigger Condition
GSM P07EC:00 Transmission Range Multi-Function Select Circuit: No Sub Type Information This DTC sets if the third contact of one of the gearshift buttons does not agree with the other two contacts within 2 seconds.
GSM P07ED:00 Transmission Range Multi-Function Select Circuit Stuck: No Sub Type Information This DTC sets if the GSM detects one of the gearshift buttons is stuck.

Possible Sources

  • Connectors damaged or pushed-out terminals, circuitry open or high resistance in the voltage feed wiring to the GSM or a loose ground.
  • Debris or interference in one of the gearshift buttons.
  • GSM
I1 INSPECT GEAR SHIFT PUSH BUTTONS
  • INSPECT the gearshift buttons for debris or foreign materials that might cause binding or sticking.

Is any debris or foreign material present?
Yes CLEAN any debris or foreign material from the gearshift buttons.
No GO to I2

I2 RETRIEVE AND RECORD ALL DTCS

NOTE: If a GSM self-test is performed, the driver door must be fully closed. A false P166B DTC can set if the driver door is not fully closed during the self-test.

  • Ignition ON.
  • Using a diagnostic scan tool, perform the GSM self-test.

Is DTC P07EC or P07ED present?
Yes GO to I3
No The system is operating correctly at this time.

I3 CHECK GSM PID STATUS
  • Using a diagnostic scan tool, monitor the following PID s while pressing and releasing the corresponding gearshift buttons:
    • Park button: SBW_PRK_SW_1, SBW_PRK_SW_2, SBW_PRK_SW_3
    • Reverse button: SBW_REV_SW_1, SBW_REV_SW_2, SBW_REV_SW_3
    • Neutral button: SBW_NEU_SW_1, SBW_NEU_SW_2, SBW_NEU_SW_3
    • Drive button: SBW_DRV_SW_1, SBW_DRV_SW_2, SBW_DRV_SW_3

Do all the PIDs switch appropriately as the gearshift buttons are pressed and released?
Yes CLEAR all GSM DTC s. PERFORM the GSM self-test. If DTC P07EC or P07ED returns, INSTALL a new GSM .
REFER to: Gear Shift Module (GSM) (307-05A Automatic Transmission External Controls - 8-Speed Automatic Transmission – 8F35/8F40, Removal and Installation).
No GO to I4

I4 CHECK FOR CORRECT GSM (GEAR SHIFT MODULE) OPERATION
  • Ignition OFF.
  • Disconnect and inspect GSM C3532 and all related in-line electrical connectors.
  • Using a good light source, inspect all disconnected electrical connectors for the following:
    • corrosion - install new connector or terminal and clean the module pins
    • damaged or bent pins - install new terminals or pins
    • pushed-out pins - install new pins as necessary
    • spread terminals - install new terminals as necessary
  • Reconnect GSM C3532 and all related in-line electrical connectors. Make sure they seat and latch correctly.
  • Operate the system and determine if the concern is still present.

Is the concern still present?
Yes CHECK OASIS for any applicable service articles: TSB , GSB (general service bulletin), SSM (special service message) or FSA (Field Service Action). If a service article exists for this concern, DISCONTINUE this test and FOLLOW the service article instructions. If no service articles address this concern, INSTALL a new GSM .
REFER to: Gear Shift Module (GSM) (307-05A Automatic Transmission External Controls - 8-Speed Automatic Transmission – 8F35/8F40, Removal and Installation).
No The system is operating correctly at this time. The concern may have been caused by module connections. ADDRESS the root cause of any connector or pin issues.

PINPOINT TEST J: PADDLE SHIFT DOES NOT OPERATE CORRECTLY

Refer to Wiring Diagrams Cell 29 for schematic and connector information.

Normal Operation and Fault Conditions

Each paddle shift switch is a momentary contact switch integral to the steering wheel. When the selector lever is placed in the sport shift position, the upshift/downshift feature is activated, allowing the operator to upshift or downshift without removing their hands from the steering wheel.

Possible Sources

  • Circuitry open/shorted
  • Clockspring
  • Paddle shift switch(es)
  • PCM
J1 MONITOR SHIFT SELECT PIDS
  • Ignition ON.
  • Enter the following diagnostic mode: Datalogger.
  • Monitor the PCM PID s, SST_D and SST_U while pressing the upshift and downshift switches.

Do both the upshift and downshift PID s show low when their respective switch is pressed and high when the switch is not pressed?
Yes The system is operating correctly at this time. The concern may have been caused by a loose connector.
No If the upshift switch PID reads high when the switch is pressed, or if the upshift PID reads low when the switch is not pressed, GO to J2
If the downshift switch PID reads high when the switch is pressed, or if the downshift PID reads low when the switch is not pressed, GO to J7 If the PID s for both switches show no change when both of the switches are pressed, GO to J12

J2 CHECK THE UPSHIFT PADDLE SWITCH
  • Remove the driver airbag module.
    REFER to: Driver Airbag (501-20B Supplemental Restraint System, Removal and Installation).
  • Disconnect Upshift Paddle Switch C2428 .
  • Inspect the connector for damaged or pushed-out terminals.
  • Measure:
    Click to display connectors
    Positive Lead Measurement / Action Negative Lead
    Component side pin 1. Component side pin 2.

Is the resistance less than 1.5 ohms with upshift switch pressed and greater than 10,000 ohms when released?
Yes GO to J3
No INSTALL a new upshift paddle switch.
REFER to: Upshift Paddle Switch (307-05A Automatic Transmission External Controls - 8-Speed Automatic Transmission – 8F35/8F40, Removal and Installation).

J3 CHECK THE UPSHIFT SIGNAL CIRCUIT FOR VOLTAGE
  • Ignition ON.
  • Measure:
    Click to display connectors
    Positive Lead Measurement / Action Negative Lead
      C2428-1   Ground

Is the voltage greater than 11 volts?
Yes GO to J12
No GO to J4

J4 CHECK THE UPSHIFT SIGNAL CIRCUIT FOR AN OPEN
  • Ignition OFF.
  • Disconnect PCM C1551B .
  • Inspect the connector for damaged or pushed-out terminals.
  • Measure:
    Click to display connectors
    Positive Lead Measurement / Action Negative Lead
      C2428-1   C1551B-6

Is the resistance less than 3 ohms?
Yes GO to J6
No GO to J5

J5 CHECK THE CLOCKSPRING CIRCUIT FOR AN OPEN
  • Disconnect Clockspring C218A .
  • Disconnect Clockspring C218B .
  • Inspect the connectors for damaged or pushed-out terminals.
  • Measure:
    Click to display connectors
    Positive Lead Measurement / Action Negative Lead
    Component Side C218A-5 Component Side C218B-1

Is the resistance less than 3 ohms?
Yes REPAIR the circuit.
No INSTALL a new clockspring.
REFER to: Clockspring (501-20B Supplemental Restraint System, Removal and Installation).

J6 CHECK THE UPSHIFT SIGNAL CIRCUIT FOR A SHORT TO GROUND
  • Measure:
    Click to display connectors
    Positive Lead Measurement / Action Negative Lead
      C2428-1   Ground

Is the resistance greater than 10,000 ohms?
Yes
   VIN required to access Guided Routine (PCM)
No REPAIR the circuit.

J7 CHECK THE DOWNSHIFT PADDLE SWITCH
  • Remove the driverair bag module.
    REFER to: Driver Airbag (501-20B Supplemental Restraint System, Removal and Installation).
  • Disconnect Downshift Paddle Shifter C2429 .
  • Inspect the connector for damaged or pushed-out terminals.
  • Measure:
    Click to display connectors
    Positive Lead Measurement / Action Negative Lead
    Component side pin 3 Component side pin 4

Is the resistance less than 1.5 ohms with downshift switch pressed and greater than 10,000 ohms when released?
Yes GO to J8
No INSTALL a new downshift paddle switch.
REFER to: Downshift Paddle Switch (307-05A Automatic Transmission External Controls - 8-Speed Automatic Transmission – 8F35/8F40, Removal and Installation).

J8 CHECK THE DOWNSHIFT CIRCUIT FOR VOLTAGE
  • Ignition ON.
  • Measure:
    Click to display connectors
    Positive Lead Measurement / Action Negative Lead
      C2429-4   Ground

Is the voltage greater than 11 volts?
Yes GO to J12
No GO to J9

J9 CHECK THE DOWNSHIFT SIGNAL CIRCUIT FOR AN OPEN
  • Ignition OFF.
  • Disconnect PCM C1551B .
  • Inspect the connector for damaged or pushed-out terminals.
  • Measure:
    Click to display connectors
    Positive Lead Measurement / Action Negative Lead
      C2429-4   C1551B-5

Is the resistance less than 3 ohms?
Yes GO to J11
No GO to J10

J10 CHECK THE CLOCKSPRING CIRCUIT FOR AN OPEN
  • Disconnect Clockspring C218A .
  • Disconnect Clockspring C218B .
  • Inspect the connectors for damaged or pushed-out terminals.
  • Measure:
    Click to display connectors
    Positive Lead Measurement / Action Negative Lead
    Component side C218A-6 Component side C218B-2

Is the resistance less than 3 ohms?
Yes REPAIR the circuit.
No INSTALL a new Clockspring.
REFER to: Clockspring (501-20B Supplemental Restraint System, Removal and Installation).

J11 CHECK THE DOWNSHIFT SIGNAL CIRCUIT FOR A SHORT TO GROUND
  • measure:
    Click to display connectors
    Positive Lead Measurement / Action Negative Lead
      C2429-4   Ground

Is the resistance greater than 10,000 ohms?
Yes
   VIN required to access Guided Routine (PCM)
No REPAIR the circuit.

J12 CHECK THE SIGNAL RETURN CIRCUIT FOR A SHORT TO GROUND
  • Ignition OFF.
  • Remove the driverair bag module (if not already removed).
    REFER to: Driver Airbag (501-20B Supplemental Restraint System, Removal and Installation).
  • Disconnect Upshift Paddle Switch C2428 (if not already disconnected) .
  • Disconnect Downshift Paddle Switch C2429 (if not already disconnected) .
  • Disconnect PCM C1551B .
  • Inspect the connector for damaged or pushed-out terminals.
  • measure:
    Click to display connectors
    Positive Lead Measurement / Action Negative Lead
      C1551B-4   Ground

Is the resistenance greater than 10,000 ohms?
Yes GO to J13
No REPAIR the circuit.

J13 CHECK THE SIGNAL RETURN CIRCUIT FOR AN OPEN
  • measure:
    Click to display connectors
    Positive Lead Measurement / Action Negative Lead
      C1551B-4   C2428-2
      C1551B-4   C2429-3

Are the resistances less than 3 ohms
Yes
   VIN required to access Guided Routine (PCM)
No GO to J14

J14 CHECK THE CLOCKSPRING CIRCUIT FOR AN OPEN
  • Disconnect Clockspring C218A .
  • Disconnect Clockspring C218B .
  • Inspect the connectors for damaged or pushed-out terminals.
  • measure:
    Click to display connectors
    Positive Lead Measurement / Action Negative Lead
    Component side C218A-7 Component side C218B-3

Is the resistance less than 3 ohms?
Yes REPAIR the circuit.
No INSTALL a new clockspring.
REFER to: Clockspring (501-20B Supplemental Restraint System, Removal and Installation).

PINPOINT TEST K: INTERNAL MODULE DTC (DIAGNOSTIC TROUBLE CODE) S

Normal Operation and Fault Conditions

The GSM performs periodic tests on itself. It sets a DTC if any of the results are outside of normal operating standards.

DTC Fault Trigger Conditions

DTC Description Fault Trigger Condition
GSM P0605:00 Internal Control Module Read Only Memory (ROM) Error: No Sub Type Information The GSM detected a ROM checksum error.
GSM P0606:00 Control Module Processor: No Sub Type Information The GSM detected a reset without going through a proper sleep cycle.
GSM P0607:00 Control Module Performance: No Sub Type Information The GSM detected an early or delayed response of greater than 10 percent of its periodic rate.
GSM P06B8:00 Internal Control Module Non-Volatile Random Access Memory (NVRAM) Error: No Sub Type Information The GSM detected a RAM checksum error.
GSM P164E:00 Internal Control Module Transmission Range Select Performance: No Sub Type Information The GSM detected a start up test failure, a program flow monitor failure, an IPC sotware failure, or a 5V_1_MONITOR failure.

Possible Sources

  • Discharged battery/charging system
  • GSM calibration
  • GSM
K1 CHECK FOR CMDTC (CONTINUOUS MEMORY DIAGNOSTIC TROUBLE CODE) S
  • Ignition ON.
  • Retrieve all CMDTC s from the GSM .

Is DTC P0562 or P0563 present in the GSM ?
Yes RESOLVE those DTC s first.
No GO to K2

K2 PROGRAM THE GSM (GEAR SHIFT MODULE) WITH THE LATEST SOFTWARE
  • Ignition ON.
  • Clear all DTC s from the GSM .
  • Reprogram the GSM with the latest software.
    REFER to: Module Programming (418-01 Module Configuration, General Procedures).
  • Using a diagnostic scan tool, carry out the GSM self-test.

Is DTC P0605, P0606, P0607, P06B8 or P164E present in the GSM ?
Yes INSTALL a new GSM .
REFER to: Gear Shift Module (GSM) (307-05A Automatic Transmission External Controls - 8-Speed Automatic Transmission – 8F35/8F40, Removal and Installation).
No The fault is not present at this time. It may have been caused by a module programming error.

PINPOINT TEST L: DTC (DIAGNOSTIC TROUBLE CODE) U0301

Normal Operation and Fault Conditions

The GSM communicates with the PCM over the HS-CAN .

DTC Fault Trigger Conditions

DTC Description Fault Trigger Condition
GSM U0301:00 Software Incompatibility with ECM/PCM: No Sub Type Information The GSM detected the incorrect PCM software is installed.

Possible Sources

  • PCM calibration
  • PCM
L1 PROGRAM THE PCM (POWERTRAIN CONTROL MODULE) WITH THE LATEST SOFTWARE
  • Ignition ON.
  • Clear all DTC s from the GSM
  • Reprogram the PCM with the latest software.
    REFER to: Module Programming (418-01 Module Configuration, General Procedures).
  • PERFORM the transmission strategy download.
    REFER to: Transmission Strategy Download (307-01A Automatic Transmission - 8-Speed Automatic Transmission – 8F35/8F40, General Procedures).
  • Using a diagnostic scan tool, carry out the PCM and GSM self-tests.

Is DTC U0301 present in the GSM ?
Yes
   VIN required to access Guided Routine (PCM) PERFORM the transmission strategy download.
REFER to: Transmission Strategy Download (307-01A Automatic Transmission - 8-Speed Automatic Transmission – 8F35/8F40, General Procedures).
No The fault is not present at this time. It may have been caused by a module programming error.

PINPOINT TEST M: TRANSMISSION STUCK IN PARK POSITION

Normal Operation and Fault Conditions

  • GSM
    • Resolve any communication DTC s between the GSM and the PCM .
  • Park lock pawl solenoid or actuator rod
    • Check the park lock pawl solenoid for operation and check the park lock pawl actuator rod for any damage or binding.REFER to: Transmission (307-01A Automatic Transmission - 8-Speed Automatic Transmission – 8F35/8F40, Overhaul).

Possible Sources

  • Module communication
  • Internal transmission components
Diagnostic steps are not provided for this symptom or DTC.  REFER to: Diagnostic Methods (100-00 General Information, Description and Operation).
PINPOINT TEST N: TRANSMISSION RETURNS TO PARK AUTOMATICALLY

Normal Operation and Fault Conditions

  • The criteria for the return to park feature was met
    • Check the system for normal operation. REFER to: External Controls - System Operation and Component Description (307-05A Automatic Transmission External Controls - 8-Speed Automatic Transmission – 8F35/8F40, Description and Operation).
  • Driver door ajar switch, circuits, BCM or GSM
    • Open then close the drivers door and cycle the door locks. If the door ajar icon is illuminated on the IPC or if the door lock and unlock is not working correctly, REFER to: Locks, Latches and Entry Systems (501-14 Handles, Locks, Latches and Entry Systems, Diagnosis and Testing).
      If the door ajar and locks are working correctly, GO to Pinpoint Test G

Possible Sources

  • Normal system operation
  • Driver door ajar switch or circuitry
  • BCM
  • GSM
Diagnostic steps are not provided for this symptom or DTC.  REFER to: Diagnostic Methods (100-00 General Information, Description and Operation).
PINPOINT TEST O: TRANSMISSION DOES NOT RETURN TO PARK WHEN THE DOOR IS OPENED

Normal Operation and Fault Conditions

  • Driver door ajar switch, circuits, BCM or GSM
    • Open the drivers door and cycle the door locks. If the door ajar icon does not illuminate on the IPC or if the door lock and unlock is not working correctly, REFER to: Locks, Latches and Entry Systems (501-14 Handles, Locks, Latches and Entry Systems, Diagnosis and Testing).
      If the door ajar and locks are working correctly, GO to Pinpoint Test G

Possible Sources

  • Driver door ajar switch or circuitry
  • BCM
  • GSM
Diagnostic steps are not provided for this symptom or DTC.  REFER to: Diagnostic Methods (100-00 General Information, Description and Operation).
PINPOINT TEST P: TRANSMISSION STUCK IN DRIVE

Normal Operation and Fault Conditions

  • GSM
    • Check for DTC s related to the GSM .
  • Park is manually released.
    • Check the park manual release cable. REFER to: Transmission Park by Wire Manual Release (307-05A Automatic Transmission External Controls - 8-Speed Automatic Transmission – 8F35/8F40, General Procedures).
  • Internal transmission components damaged
    • Check the park lock pawl solenoid operation. REFER to: Transmission (307-01A Automatic Transmission - 8-Speed Automatic Transmission – 8F35/8F40, Overhaul).
    • Check the park pawl and actuator rod for damage. REFER to: Transmission (307-01A Automatic Transmission - 8-Speed Automatic Transmission – 8F35/8F40, Overhaul).

Possible Sources

  • Park is manually released
  • GSM
  • Internal transmission components
Diagnostic steps are not provided for this symptom or DTC.  REFER to: Diagnostic Methods (100-00 General Information, Description and Operation).

    Description and Operation - External Controls - System Operation and Component Description

    System Diagram Item Description 1 GSM 2 GWM 3 RCM 4 IPC 5 PCM 6 BCM 7 Driver 8 Door 9 Latch 10 Brake 11 On/Off (BOO) 12 Switch Network Message Chart Broadcast Message Originating Module Message Purpose Brake switch position BCM Input from brake switch necessary to change gears...

    General Procedures - Transmission Park by Wire Manual Release

    Activation NOTE: If the vehicle battery is dead or there is no electrical power available, connect an external power source. Apply the parking brake...

    Other information:

    Lincoln Corsair 2020-2024 Service Manual: Removal and Installation - Active Grille Shutter Actuator


    Special Tool(s) / General Equipment Flat Headed Screw Driver Removal NOTE: Removal steps in this procedure may contain installation details. Remove the active grille shutter. Refer to: Active Grille Shutter (501-02 Front End Body Panels, Removal and Installation)...

    Lincoln Corsair 2020-2024 Owners Manual: What Is the 360 Degree Camera. 360 Degree Camera Precautions. 360 Degree Camera Limitations


    What Is the 360 Degree Camera The 360 degree camera system consists of front, side and rear cameras. The 360 degree camera system: Allows you to see what is directly in front of or behind your vehicle. Provides a cross traffic view in front of and behind your vehicle...

    Categories

    Autowipers (IF EQUIPPED)

    Wet or winter driving conditions with ice, snow or salty road mist can cause inconsistent and unexpected wiping or smearing.

    Lincoln Corsair. Autowipers (IF EQUIPPED)

    Autowipers On. High sensitivity. Low sensitivity.

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