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 C0176 54 : System Thermal Error Temperature HighCircuit/System Description
The PSCM uses a combination of commanded motor voltage and current levels to calculate an estimated power steering system temperature. If the PSCM detects a high system temperature event is occurring, the amount of assist is reduced to lower system temperature to prevent thermal damage to the power steering components.
Condition for Running the DTC
The ignition is ON.
Conditions for Setting the DTC
The PSCM detects a high system temperature.
Action Taken When the DTC Sets
| • | DTC C0176 54 is stored in memory. |
| • | Steering assist is reduced. |
Conditions for Clearing the DTC
| • | A current DTC will clear when the power steering system temperature returns to normal. |
| • | A history DTC will clear after 100 consecutive malfunction-free ignition cycles. |
Diagnostic Aids
| • | DTC C0176 54 does not indicate that a malfunction has occurred. Rather that the PSCM had to limit current to the power steering motor to avoid thermal damage to the power steering system components. |
| • | Ensure that no steering components down stream of the power steering gear assembly, universal joints, ball joints or tie rod ends are mechanically binding. |
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
- Verify that the DTC sets outside of the Conditions for Running and Setting. Since most occurrences of this DTC are caused by excessive driver inputs, review with the customer the conditions under which the DTC set.
| ⇒ | If the DTC set within the Conditions for Running and Setting, the power steering is operating as designed. |
Repair Instructions
Perform the Diagnostic Repair Verification after completing the diagnostic procedure.
