Refer to Wiring Diagrams Cell 128 for schematic and connector information.
Normal Operation and Fault Conditions
The SCCM receives input directly from the steering column control
switch then sends a message along the HS-CAN2 to the GWM indicating the
desired steering column movement. The GWM sends the message to the DSM
along the MS-CAN which activates the tilt and telescopic (reach) motors
depending on the message received.
Possible Sources
- Wiring, terminals or connectors
- Adjustable steering column tilt motor
- Adjustable steering column telescopic motor
-
DSM
-
SCCM
-
GWM
NOTICE:
Use the correct probe adapter(s) when making
measurements. Failure to use the correct probe adapter(s) may damage the
connector.
|
A1 CHECK THE COMMUNICATION NETWORK |
-
Using a diagnostic scan tool, carry out the Network Test.
Do the GWM , SCCM and DSM all pass the Network Test?
No |
DIAGNOSE the no communication concern for the GWM , SCCM or DSM . REFER to: Communications Network (418-00 Module Communications Network, Diagnosis and Testing).
|
|
A2 CHECK FOR DIAGNOSTIC TROUBLE CODES (DTCS) IN THE GWM (GATEWAY MODULE A)
|
-
Using a diagnostic scan tool, carry out the GWM self-test.
Are any Diagnostic Trouble Codes (DTCs) present in the GWM ?
Yes |
DIAGNOSE the GWM Diagnostic Trouble Codes (DTCs). REFER to: Communications Network (418-00 Module Communications Network, Diagnosis and Testing).
|
|
A3 CHECK FOR DIAGNOSTIC TROUBLE CODES (DTCS) IN THE SCCM (STEERING COLUMN CONTROL MODULE)
|
-
Using a diagnostic scan tool, carry out the SCCM self-test.
Are any SCCM Diagnostic Trouble Codes (DTCs) present?
Yes |
DIAGNOSE the SCCM Diagnostic Trouble Codes (DTCs). REFER to:
Steering Wheel and Column Electrical Components (211-05 Steering Wheel
and Column Electrical Components, Diagnosis and Testing).
|
|
A4 CHECK FOR DIAGNOSTIC TROUBLE CODES (DTCS) IN THE DSM (DRIVER FRONT SEAT MODULE)
|
-
Using a diagnostic scan tool, carry out the DSM self-test.
Are any Diagnostic Trouble Codes (DTCs) present in the DSM ?
Yes |
For DSM
DTC B1375:11, B1375:12, B1375:13, B137E:11, B137E:12, B137E:13, GO to Pinpoint Test D
For all other DSM Diagnostic Trouble Codes (DTCs), REFER to: Front Seats (501-10A Front Seats, Diagnosis and Testing).
|
|
A5 CHECK THE SCCM (STEERING COLUMN CONTROL MODULE)
STEERING COLUMN ADJUST SWITCH (STRCOL_ADJ) PID (PARAMETER IDENTIFICATION)
|
Does the PID display match each steering column control switch position?
No |
If the PID displays "No Movement" or "Invalid", or if the PID display
does not match one or more switch positions, INSTALL a new steering
column control switch. REFER to: Steering Column (211-04 Steering
Column, Diagnosis and Testing). TEST the system for normal operation. If
the adjustable steering column is still inoperative, CHECK OASIS for
any applicable TSB , GSB , SSM , or FSA
. 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 SCCM . REFER to: Steering Column
Control Module (SCCM) (211-05 Steering Wheel and Column Electrical
Components, Removal and Installation).
|
|
A6 CHECK THE ADJUSTABLE STEERING COLUMN MOTOR CIRCUITS FOR AN OPEN |
-
Disconnect Adjustable Steering Column Tilt Motor C267.
-
Disconnect Adjustable Steering Column Telescope Motor C227.
-
Measure:
Click to display connectors
Positive Lead
|
Measurement / Action
|
Negative Lead
|
C341B-13
|
|
C267-2
|
C341B-6
|
|
C267-1
|
-
Measure:
Click to display connectors
Positive Lead
|
Measurement / Action
|
Negative Lead
|
C341B-3
|
|
C227-1
|
C341B-12
|
|
C227-2
|
Are the resistances less than 3 ohms?
|
A7 CHECK THE ADJUSTABLE STEERING COLUMN MOTOR CIRCUITS FOR A SHORT TO GROUND |
-
Measure:
Click to display connectors
Positive Lead
|
Measurement / Action
|
Negative Lead
|
C267-1
|
|
Ground
|
C267-2
|
|
Ground
|
-
Measure:
Click to display connectors
Positive Lead
|
Measurement / Action
|
Negative Lead
|
C227-1
|
|
Ground
|
C227-2
|
|
Ground
|
Are the resistances greater than 10,000 ohms?
|
A8 CHECK THE ADJUSTABLE STEERING COLUMN TILT MOTOR OPERATION |
-
Connect Adjustable Steering Column Tilt Motor C267.
-
Connect a fused jumper wire:
Click to display connectors
Positive Lead
|
Measurement / Action
|
Negative Lead
|
Positive battery terminal
|
|
C341B-13
|
-
Momentarily connect a fused jumper wire:
Click to display connectors
Positive Lead
|
Measurement / Action
|
Negative Lead
|
C341B-6
|
|
Ground
|
Does the tilt motor move the steering column when the fused jumper wire is connected to ground?
No |
INSTALL a new adjustable steering column tilt motor. REFER to: Steering Column (211-04 Steering Column, Removal and Installation).
|
|
A9 CHECK THE ADJUSTABLE STEERING COLUMN TELESCOPIC MOTOR OPERATION |
-
Connect Adjustable Steering Column Telescope Motor C227.
-
Connect a fused jumper wire:
Click to display connectors
Positive Lead
|
Measurement / Action
|
Negative Lead
|
Positive battery terminal
|
|
C341B-3
|
-
Momentarily connect a fused jumper wire:
Click to display connectors
Positive Lead
|
Measurement / Action
|
Negative Lead
|
C341B-12
|
|
Ground
|
Does the telescopic motor move the steering column when the fused jumper wire is connected to ground?
No |
INSTALL a new steering column. REFER to: Steering Column (211-04 Steering Column, Removal and Installation).
|
|
A10 CHECK FOR CORRECT DSM (DRIVER FRONT SEAT MODULE)
OPERATION |
-
Repair:
-
corrosion (install new connector or terminal - clean module pins)
-
damaged or bent pins - install new terminals or pins
-
pushed-out pins - install new pins as necessary
-
Connect Adjustable Steering Column Tilt Motor C267.
-
Connect Adjustable Steering Column Telescopic Motor C227.
-
Operate the system and determine if the concern is still present.
Is the concern still present?
Yes |
CHECK OASIS for any applicable TSB , GSB , SSM , or FSA
. 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 DSM . REFER to: Driver Front Seat Module (DSM) (501-10A Front Seats, 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.
|
|