B2880

DTC B2880

DTC Descriptor

DTC B2880
- Tilt Position Sensor Failure

Diagnostic Fault Information

Perform the Diagnostic System Check - Vehicle prior to using this diagnostic procedure. Initial Inspection and Diagnostic Overview

Circuit/System Description

The memory seat module (MSM) determines the position of the steering column based on inputs received from position sensor built into the tilt actuator. The MSM supplies a 5 volt reference and a ground to the sensor and monitors the column position via the tilt sensor signal circuit.

Conditions for Running the DTC

Ignition ON

Conditions for Setting the DTC

This DTC will set when the tilt sensor signal circuit voltage is less than 0.25 volt or greater than 4.75 volts for 2 seconds.

Action Taken When the DTC Sets

The MSM will not allow the tilt actuator to operate during memory recall and/or easy exit operations. The actuator will still operate from the tile/telescope switch.

Conditions for Clearing the DTC

* A current DTC will clear when a fault is no longer present.
* A history DTC will clear after 100 malfunction-free ignition cycles.

Circuit/System Verification

Ignition ON, observe the scan tool tilt sensor parameter. The reading should be between 0.25 and 4.75 volts.

Circuit/System Testing

1. Ignition OFF, disconnect the harness connector C2 at the tilt actuator.
2. Ignition OFF, test for less than 1.0 ohm resistance between the low reference circuit terminal A and ground

- If greater than the specified range, test the low reference circuit for open/high resistance. If the circuit tests normal, replace the MSM

3. Ignition ON, test for 4.8-5.2 volts between the 5 volt reference circuit terminal B and ground.

- If less than the specified range, test the 5 volt reference circuit for a short to ground or an open/high resistance. If the circuit tests normal, replace the MSM
- If greater than the specified range, test the 5 volt reference circuit for a short to voltage. If the circuit tests normal, replace the MSM

4. Verify the scan tool Tilt Sensor parameter is greater than 4.75 volts.

- If less than the specified range, test the signal circuit terminal C for a short to ground. If the circuit tests normal, replace the MSM.

5. Install a 3-A fused jumper wire between the signal circuit terminal C and the low reference circuit terminal A. Verify the scan tool Tilt Sensor parameter is less than 0.25 volt.

- If greater than the specified range, test the signal circuit for a short to voltage or an open/high resistance. If the circuit tests normal, replace the MSM.

6. If all circuits tests normal, test or replace the tilt actuator.

Repair Instructions

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

* Tilt Motor Replacement
* Control Module References for MSM replacement, setup, and programming