Circuit Description
The steering column module receives ground inputs from contacts inside the tilt/telescoping switch. The steering column module then supplies battery voltage to the tilt motor UP or DOWN circuit, or, the telescope motor IN or OUT circuit depending on which direction of movement is requested. Both motors are reversible and the circuits are simply reversed to accomplish movement in opposite directions.
Conditions for Running the DTC
The steering column module is awake.
Conditions for Setting the DTC
The steering column module detects a switch input for more than 30 seconds after movement of the motor in the requested direction has stopped.
Action Taken When the DTC Sets
| • | The motor that is being driven by the failed switch will be deactivated. |
| • | Memory recall functions will be disabled. |
Conditions for Clearing the DTC
| • | The DTC will clear from current status when the failed switch input is no longer active. |
| • | Use the ON-Board clearing DTCs feature. |
| • | Use a scan tool. |
Diagnostic Aids
An intermittently stuck switch can cause this DTC to set. Refer to Testing for Intermittent Conditions and Poor Connections in Wiring Systems.
Step | Action | Value(s) | Yes | No |
|---|---|---|---|---|
1 | Did you perform the Tilt/Telescoping Steering Column Diagnostic System Check? | -- | Go to Step 2 | Go to Tilt/Telescoping Steering Column Diagnostic System Check |
2 |
Is DTC B2878 displayed as current? | -- | Go to Step 3 | Go to Diagnostic Aids |
3 |
Is DTC B2878 displayed as current? | -- | Go to Step 4 | Go to Step 5 |
4 | Inspect for poor connections at the harness connector of the tilt/telescoping steering column switch. Refer to Testing for Intermittent Conditions and Poor Connections and Connector Repairs in Wiring Systems Did you find and correct the condition? | -- | Go to Step 7 | Go to Step 6 |
5 |
Important:: Perform the set up procedure for the steering column module. Replace the tilt/telescoping steering column switch. Refer to Steering Column Tilt Wheel and Telescope Switch Replacement . Did you complete the replacement? | -- | Go to Step 7 | -- |
6 |
Important:: Perform the set up procedure for the steering column module. Replace the control module. Refer to Steering Column Control Module Replacement . Did you complete the replacement? | -- | Go to Step 7 | -- |
7 |
Does the DTC reset? | -- | Go to Step 2 | System OK |
