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 Descriptor
DTC C1525 02: Engine Running Signal Short to GroundDTC C1525 08: Engine Running Signal Invalid
Diagnostic Fault Information
Perform the Diagnostic System Check - Vehicle prior to using this diagnostic procedure.
Circuit | Short to Ground | Open/High Resistance | Short to Voltage | Signal Performance |
|---|---|---|---|---|
Engine Running Signal | C1525 02 | C1525 08 | -- | -- |
Circuit/System Description
A short to ground, poor resistance, or short to voltage on the generator turn ON signal or engine running signal circuit between the power steering control module and the underhood fuse block.
Conditions for Running the DTC
Engine running.
Conditions for Setting the DTC
Engine running signal detected low for 100 milliseconds.
Action Taken When the DTC Sets
| • | The steering boost is increased step-wise (intermittent condition). |
| • | The steering boost is decreased step-wise (No signal condition). |
Conditions for Clearing the DTC
The trouble code is deleted after the system was switched on 1 times and there was no fault recognized.
Diagnostic Aids
Confirm the vehicle is or is not equipped with a rear electrical center configuration. Verify scan tool is correctly identifying REC equipped status on the vehicle.
Reference Information
Schematic Reference
Connector End View Reference
Description and Operation
Power Steering System Description and Operation
Electrical Information Reference
Scan Tool Reference
Control Module References for scan tool information
Circuit/System Verification
Ignition ON, Engine Running, with a scan tool observe the Electronic Hydraulic Power Steering (EHPS) Engine Running Signal Inactive/Active scan tool data.
Circuit/System Testing
- Ignition OFF, disconnect the X2 harness connector at the power steering control module.
- Ignition ON, Engine Running, verify a test lamp illuminates between the signal circuit terminal 5 and ground.
- If all circuits test normal, test or replace the PSCM
| ⇒ | If the test lamp does not illuminate, test the signal circuit for a short to ground or an open/high resistance. if the circuit tests normal, test or replace the underhood junction block. |
Repair Instructions
Perform the Diagnostic Repair Verification after completing the diagnostic procedure.
Important: For any module replacement a set procedure needs to be followed. A "Reset" needs to be performed from the PROGRAMMING menu of the current system with the Tech 2 BEFORE replacing the module.
