For 1990-2009 cars only
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 C0845 03: Device Ignition 1 Circuit Voltage Below ThresholdCircuit/System Description
The power steering control module (PSCM) actively monitors the ignition voltage seen at the module, comparing the actual voltage with that reported over serial data.
Conditions for Running the DTC
Engine running
Conditions for Setting the DTC
The PSCM detects that the ignition voltage is less than 9.2 volts
Action Taken When the DTC Sets
| • | Active Steering is disabled. |
| • | SERVICE STEERING SYS and/or STABILITY SECURE MODE is displayed on the DIC. |
Conditions for Clearing the DTC
| • | A current DTC will clear on the next malfunction free ignition cycle. |
| • | A history DTC will clear after 100 consecutive malfunction free ignition cycles. |
Diagnostic Aids
A low voltage DTC in multiple modules indicates a charging system concern.
Reference Information
Schematic Reference
Connector End View Reference
Description and Operation
Active Front Steering Description and Operation
Electrical Information Reference
Scan Tool Reference
Control Module References for scan tool information
Circuit/System Testing
- Ignition OFF, disconnect the X1 harness connector at the PSCM.
- Ignition ON, test for B+ between the ignition voltage circuit terminal 1 and ground.
- If all circuits test normal, replace the PSCM.
| ⇒ | If not the specified value, test the ignition circuit for a short to ground or an open/high resistance. |
Repair Instructions
Perform the Diagnostic Repair Verification after completing the diagnostic procedure.
Control Module References for PSCM replacement, setup, and programming
