Diagnostic Instructions
| • | Perform the Diagnostic System Check - Vehicle prior to using this diagnostic procedure. |
| • | Review Strategy Based Diagnosis for an overview of the diagnostic approach. |
| • | Diagnostic Procedure Instructions provides an overview of each diagnostic category. |
DTC Descriptors
DTC B2860 08: Telescope Position Sensor Circuit Signal InvalidDTC B2860 58: Telescope Position Sensor Circuit Incorrect Reaction After Event
DTC B2880 08: Tilt Position Sensor Circuit Signal Invalid
DTC B2880 58: Tilt Position Sensor Circuit Incorrect Reaction After Event
Diagnostic Fault Information
Circuit | Short to Ground | Open/High Resistance | Short to Voltage | Signal Performance |
|---|---|---|---|---|
5-Volt Reference | B2860 08, B2880 08 | B2860 08, B2880 08 | B2860 08, B2880 08 | -- |
Steering Column Tilt Sensor Signal | B2880 08 | B2880 08 | B2880 08 | -- |
Steering Column Telescope Sensor Signal | B2860 08 | B2860 08 | B2860 08 | -- |
Steering Column Tilt Motor Control - Up | B2880 08 | B2880 08 | B2880 08 | -- |
Steering Column Tilt Motor Control - Down | B2880 08 | B2880 08 | B2880 08 | -- |
Steering Column Telescope Motor Control - Forward | B2860 08 | B2860 08 | B2860 08 | -- |
Steering Column Telescope Motor Control - Reverse | B2860 08 | B2860 08 | B2860 08 | -- |
Low Reference | -- | B2860 08, B2880 08 | -- | -- |
Circuit Description
The memory seat module (MSM) determines the position of the steering column based on inputs received from the tilt or telescope position sensors built into the tilt or telescope actuators. The MSM supplies a 5-volt reference and a low reference to the sensors and monitors the column position via the steering column tilt or telescope sensor signal circuit.
Conditions for Running the DTC
| • | The Ignition is ON. |
| • | The system voltage is between 9-16 volts. |
Conditions for Setting the DTC
B2860 08
The steering column telescope sensor signal voltage is less than 0.2 volt for more than 2 seconds.
B2860 58
The steering column telescope sensor signal voltage is greater than 4.8 volts for more than 2 seconds.
B2880 08
The steering column tilt sensor signal voltage is less than 0.2 volt for more than 2 seconds.
B2880 58
The steering column tilt sensor signal voltage is greater than 4.8 volts for more than 2 seconds.
Action Taken When the DTC Sets
Steering column tilt and telescope operations are suspended.
Conditions for Clearing the DTC
| • | A current DTC will clear when the malfunction is no longer present |
| • | A history DTC will clear after 50 malfunction-free ignition cycles. |
Reference Information
Schematic Reference
Tilt/Telescoping Steering Column Schematics
Connector End View Reference
Description and Operation
Steering Wheel and Column Description and Operation
Electrical Information Reference
Scan Tool Reference
Control Module References for Scan Tool Information
Circuit/System Verification
Ignition ON, accuate the telescope or tilt function through the entire range of travel. The telescope or tilt parameter should display between 0.2 and 4.8 volts.
Circuit/System Testing
Telescope or Tilt Sensor Circuit Malfunction
- Ignition OFF, disconnect the harness connector X2 at the telescope or tilt actuator.
- Ignition OFF, test for less than 2.0 ohms between the low reference circuit terminal A and ground.
- Ignition ON, test for 4.8-5.2 volts between the 5-volt reference circuit terminal B and ground.
- Verify the scan tool Telescope or Tilt Sensor parameter is less than 0.2 volt.
- Install a 3A fused jumper wire between the signal circuit terminal C and the 5-volt reference circuit terminal B. Verify the scan tool Telescope or Tilt Sensor parameter is greater than 4.8 volts.
- If all circuits test normal, test or replace the telescope or tilt actuator.
| ⇒ | If greater than the specified range, test the low reference circuit for an open/high resistance. If the circuit tests normal, replace the MSM. |
| ⇒ | 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. |
| ⇒ | If greater than the specified range, test the signal circuit terminal C for a short to voltage. If the circuit tests normal, replace the MSM. |
| ⇒ | If less than the specified range, test the signal circuit for a short to ground or an open/high resistance. If the circuit tests normal, replace the MSM. |
Repair Instructions
Perform the Diagnostic Repair Verification after completing the diagnostic procedure.
| • | Control Module References for MSM replacement, setup, and programming |
