C0176

DTC C0176

Diagnostic Instructions

* Perform the Diagnostic System Check - Vehicle Diagnostic System Check - Vehicle prior to using this diagnostic procedure.

* Review Strategy Based Diagnosis Strategy Based Diagnosis for an overview of the diagnostic approach.

* Diagnostic Procedure Instructions Diagnostic Procedure Instructions provides an overview of each diagnostic category.

DTC Descriptor

DTC C0176
- Control Module Temperature Sensor

For symptom byte information, refer to Symptom Byte List Symptom Byte List.

Circuit/System Description

The power steering control module monitors the temperature of the power steering system. The power steering control module uses voltage, current levels and input from an internal temperature sensor to calculate an estimated system temperature. If the power steering control module 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.

Conditions for Running the DTC

* The ignition is ON, with the engine ON.

* Power steering system voltage is 9-16 volts.

* Repetitive steering input is present.

Conditions for Setting the DTC

The power steering control module 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 on the next malfunction-free ignition cycle.

* A history DTC will clear after 40 consecutive malfunction-free ignition cycles.

Diagnostic Aids

* DTC C0176 54 does not indicate that a malfunction has occurred. Rather that the power steering control module had to limit current to the power steering motor to avoid thermal damage to the power steering system components. Discuss with the customer about driving conditions when the steering assist was reduced.

* Ensure that no steering components down stream of the power steering column assembly, such as ball joints, tie rod ends, universal joints, or the steering gear assembly, are mechanically binding.

Reference Information

Schematic Reference

Power Steering Schematics Electrical Diagrams

Connector End View Reference

Component Connector End Views Fuel Pump and Level Sensor Assembly

Description and Operation

Power Steering System Description and Operation Description and Operation

Electrical Information Reference

* Circuit Testing Circuit Testing

* Connector Repairs Connector Repairs

* Testing for Intermittent Conditions and Poor Connections Testing for Intermittent Conditions and Poor Connections

* Wiring Repairs Wiring Repairs

Scan Tool Reference

Control Module References Control Module References for scan tool information

Circuit/System Verification

Note: Since most occurrences of this DTC are caused by excessive driver inputs, review the conditions under which the DTC sets with the customer.

1. Verify the DTC sets outside the conditions for running and setting the DTC.

• If the DTC sets within the conditions for running and setting the DTC
The power steering system is operating as designed

• If the DTC sets outside the conditions for running and setting the DTC

2. Operate the vehicle within the conditions that the customer experienced.

3. Verify that the DTC does not set.

• If the DTC sets
Replace the K43 Power Steering Control Module

• If the DTC does not set

4. All OK.

Repair Instructions

Perform the Diagnostic Repair Verification Verification Tests after completing the repair.

* Steering Gear Replacement Steering Gear Replacement

* Control Module References Control Module References for power steering control module replacement, programming and setup.