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 C1523 03: System Voltage Low VoltageDTC C1523 07: System Voltage High Voltage
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 |
|---|---|---|---|---|
Power Steering Control Module B+ | C1523 03 | C1523 03 | C1523 07 | -- |
Circuit/System Description
The power steering control module (PSCM) monitors the system voltage to ensure that the voltage stays within proper range. Damage to components and incorrect data may occur when the voltage is out of range.
Conditions for Running the DTC
| • | Engine Running |
| • | Power steering system voltage is 9-16 volts. |
Conditions for Setting the DTC
DTC C1523 03
The input voltage at the power steering control unit Connector X1, terminal 1 is less than 9 volts for at least 0.3 seconds.
DTC C1523 07
The input voltage at the power steering control unit Connector X1, terminal 1 is greater than 16 volts for at least 0.1 second.
Action Taken When the DTC Sets
Steering boost is decreased.
Conditions for Clearing the DTC
A history DTC will clear after 60 consecutive malfunction-free ignition cycles.
Diagnostic Aids
| • | Overheating of the system caused by overload. |
| • | After many steering movements the steering is overheated (for example, parking several times at high outside temperature). |
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 Testing
- Ignition OFF, disconnect the X2 harness connector at the power steering module.
- Test for less than 5.0 Ohm between the ground circuit terminal 2 and ground.
- Verify a test lamp illuminates between the circuit terminals listed below and ground.
- If all circuits test normal, replace the power steering module.
| ⇒ | If greater than the specified range, test the ground circuit for an open/high resistance. |
| • | Connector X2, terminal 1 |
| • | Connector X1, terminal 1 |
| ⇒ | If the test lamp does not illuminate, test the appropriate circuit for a short to ground or an open/high resistance. |
Repair Instructions
Important: For any module replacement a set procedure needs to be followed. A "Reset" may need to be performed from the PROGRAMMING menu of the current system with the scan tool BEFORE replacing the module.
| • | Perform the Diagnostic Repair Verification after completing the repair. |
