Power Steering

CIRCUIT OPERATION
As part of its normal processing, the Power Steering Control Module (PSCM) performs data checks to RAM on a continuous basis. Certain data is stored in RAM until it is summoned by the microprocessor or superseded by more recent data. Data stored in RAM is erased when the system is switched off.

CONDITIONS FOR SETTING THE DTC
DTC 23 is an internal Power Steering Control Module (PSCM) fault (RAM defect).

ACTION TAKEN WHEN THE DTC SETS
Power steering assist will default to partial manual steering effort.

CONDITIONS FOR CLEARING THE DTC
Replacing the power steering control module.

DIAGNOSTIC AIDS
- Before replacing the Power Steering Control Module (PSCM), test the power circuit (BRN wire) and ground circuit (BLK wire).
- Perform a voltage drop test when testing the power and ground circuit.

TEST DESCRIPTION
The number(s) below refer to the step number(s) on the diagnostic table.
2. This step checks for the proper voltage to the module. Proper voltage is needed by the module to operate properly.
4. This step checks for the proper ground to the module. A proper ground is needed by the module to operate properly.
6. This step replaces the power steering control module.