B2875

DTC B2875

Diagnostic Instructions

* Perform the Diagnostic System Check - Vehicle (Initial Inspection and Diagnostic Overview) prior to using this diagnostic procedure.
* Review Strategy Based Diagnosis (Initial Inspection and Diagnostic Overview) for an overview of the diagnostic approach
* Diagnostic Procedure Instructions (Initial Inspection and Diagnostic Overview) provides an overview of each diagnostic category



DTC Descriptor
DTC B2875 01
- Tilt Down Switch Circuit Short to Battery




Diagnostic Fault Information






Circuit Description

The memory seat module (MSM) receives voltage inputs from the tilt/telescope switch based on the position of the switch. The MSM then supplies battery voltage and a ground to the tilt or telescope motor control circuits depending on which direction of movement is requested.


Conditions for Running the DTC

The ignition ON.


Conditions for Setting the DTC

The MSM detects a tilt down switch input for more than 30 consecutive seconds after down movement of the motor has stopped.


Action Taken When the DTC Sets

* The tilt motor will be deactivated.
* Memory recall functions will be disabled.



Conditions for Clearing the DTC

* A current DTC will clear when the failed switch input is no longer active.
* A history DTC will clear after 100 ignition cycles.



Diagnostic Aids

An intermittently stuck tilt switch may cause this DTC to set.


Reference Information
Schematic Reference

Tilt/Telescoping Steering Column Schematics (Tilt/Telescoping Steering Column Schematics)
Connector End View Reference

Component Connector End Views (Connector Views)
Description and Operation

Steering Wheel and Column Description and Operation (Description and Operation)
Electrical Information Reference

* Circuit Testing (Component Tests and General Diagnostics)
* Connector Repairs (Component Tests and General Diagnostics)
* Testing for Intermittent Conditions and Poor Connections (Component Tests and General Diagnostics)
* Wiring Repairs (Component Tests and General Diagnostics)

Scan Tool Reference

Programming and Relearning (Programming and Relearning) for Scan Tool Information


Circuit/System Verification

Ignition ON, view the scan tool Tilt Down Switch parameter while cycling the tilt/telescope switch between the neutral and TILT DOWN position. The parameter should change between Active and Inactive.


Circuit/System Testing

1. Ignition OFF, disconnect the harness connector at the tilt/telescope switch.
2. Ignition ON, verify a test lamp illuminates between the B+ circuit terminal 4 and ground.

• If the test lamp does not illuminate, test the B+ circuit for a short to ground or an open/high resistance.

3. Verify the scan tool Tilt Down Switch parameter is Inactive.

• If not the specified value, test the signal circuit terminal 1 for a short to voltage. If the circuit tests normal, replace the MSM.

4. Install a 3A fused jumper wire between the signal circuit terminal 1 and the B+ circuit terminal 4. Verify the scan tool Tilt Down Switch parameter is Active.

• If not the specified value, test the signal circuit for a short to ground or an open/high resistance. If the circuit tests normal, replace the MSM.

5. If all circuit test normal, test or replace the tilt/telescope switch.



Component Testing


Tilt/Telescope Switch
1. Ignition OFF, disconnect the harness connector at the tilt/telescope switch.
2. Test for infinite resistance between the following terminals with the switch in the neutral position:

* B+ terminal 4 and signal terminal 5
* B+ terminal 4 and signal terminal 1
* B+ terminal 4 and signal terminal 2
* B+ terminal 4 and signal terminal 3


• If less than the specified range, replace the tilt/telescope switch.

3. Test for less than 1 ohm between the B+ terminal 4 and the signal terminal 5 with the switch in the TILT UP position.

• If greater than the specified range, replace the tilt/telescope switch.

4. Test for less than 1 ohm between the B+ terminal 4 and the signal terminal 1 with the switch in the TILT DOWN position.

• If greater than the specified range, replace the tilt/telescope switch.

5. Test for less than 1 ohm between the B+ terminal 4 and the signal terminal 2 with the switch in the TELESCOPE OUT position.

• If greater than the specified range, replace the tilt/telescope switch.

6. Test for less than 1 ohm between the B+ terminal 4 and the signal terminal 3 with the switch in the TELESCOPE IN position.

• If greater than the specified range, replace the tilt/telescope switch.




Repair Instructions

Perform the Diagnostic Repair Verification (Verification Tests) after completing the diagnostic procedure.

* Steering Column Replacement (Steering Column Replacement)
* Programming and Relearning (Programming and Relearning) for MSM replacement, setup, and programming