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.
A failure of the steering column control switch,
circuits, motor or module cause the power adjustable column to become
inoperative and a DTC may be set in the SCCM and the DSM.
REFER to: Steering Column - System Operation and Component Description (211-04 Steering Column, Description and Operation).
Possible Sources
- Wiring, terminals or connectors
- Adjustable steering column tilt motor
- Adjustable steering column telescopic motor
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DSM
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SCCM
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GWM
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NOTICE:
Use the correct probe adapter(s) when making
measurements. Failure to use the correct probe adapter(s) may damage the
connector.
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A1 CHECK THE COMMUNICATION NETWORK |
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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).
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A2 CHECK FOR DIAGNOSTIC TROUBLE CODES (DTCS) IN THE GWM (GATEWAY MODULE A)
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-
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).
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A3 CHECK FOR DIAGNOSTIC TROUBLE CODES (DTCS) IN THE SCCM (STEERING COLUMN CONTROL MODULE)
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-
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).
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A4 CHECK FOR DIAGNOSTIC TROUBLE CODES (DTCS) IN THE DSM (DRIVER FRONT SEAT MODULE)
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-
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).
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A5 CHECK THE SCCM (STEERING COLUMN CONTROL MODULE)
STEERING COLUMN ADJUST SWITCH (STRCOL_ADJ) PID (PARAMETER IDENTIFICATION)
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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 Control Switch (211-05 Steering Wheel and Column Electrical Components, Removal and Installation). 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).
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A6 CHECK THE ADJUSTABLE STEERING COLUMN MOTOR CIRCUITS FOR AN OPEN |
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Disconnect Adjustable Steering Column Tilt Motor C2600.
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Disconnect Adjustable Steering Column Telescope Motor C2601.
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Measure:
Click to display connectors
Positive Lead
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Measurement / Action
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Negative Lead
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C341B-13
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C2600-2
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C341B-6
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C2600-1
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Measure:
Click to display connectors
Positive Lead
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Measurement / Action
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Negative Lead
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C341B-3
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C2601-1
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C341B-12
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C2601-2
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Are the resistances less than 3 ohms?
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A7 CHECK THE ADJUSTABLE STEERING COLUMN MOTOR CIRCUITS FOR A SHORT TO GROUND |
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Measure:
Click to display connectors
Positive Lead
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Measurement / Action
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Negative Lead
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C2600-1
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Ground
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C2600-2
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Ground
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Measure:
Click to display connectors
Positive Lead
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Measurement / Action
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Negative Lead
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C2601-1
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Ground
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C2601-2
|
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Ground
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Are the resistances greater than 10,000 ohms?
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A8 CHECK THE ADJUSTABLE STEERING COLUMN TILT MOTOR OPERATION |
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Connect Adjustable Steering Column Tilt Motor C2600.
-
Connect a fused jumper wire:
Click to display connectors
Positive Lead
|
Measurement / Action
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Negative Lead
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Positive battery terminal
|
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C341B-13
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Momentarily connect a fused jumper wire:
Click to display connectors
Positive Lead
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Measurement / Action
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Negative Lead
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C341B-6
|
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Ground
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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 Tilt Motor (211-04 Steering Column, Removal and Installation).
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A9 CHECK THE ADJUSTABLE STEERING COLUMN TELESCOPIC MOTOR OPERATION |
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Connect Adjustable Steering Column Telescope Motor C2601.
-
Connect a fused jumper wire:
Click to display connectors
Positive Lead
|
Measurement / Action
|
Negative Lead
|
Positive battery terminal
|
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C341B-3
|
-
Momentarily connect a fused jumper wire:
Click to display connectors
Positive Lead
|
Measurement / Action
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Negative Lead
|
C341B-12
|
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Ground
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Does the telescopic motor move the steering column when the fused jumper wire is connected to ground?
No |
INSTALL a new steering column telescopic motor. REFER to: Steering Column Telescopic Motor (211-04 Steering Column, Removal and Installation).
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A10 CHECK FOR CORRECT DSM (DRIVER FRONT SEAT MODULE)
OPERATION |
-
Repair:
-
corrosion (install new connector or terminal - clean module pins)
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damaged or bent pins - install new terminals or pins
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pushed-out pins - install new pins as necessary
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Connect Adjustable Steering Column Tilt Motor C2600.
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Connect Adjustable Steering Column Telescopic Motor C2601.
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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).
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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.
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