DTC C0475
Diagnostic Instructions
DTC Descriptors
DTC C0475 00: Electric Steering Motor Circuit Malfunction
DTC C0475 59: Electric Steering Motor Circuit Protection Time-Out
Circuit/System Description
C0475 00
The power steering control module continuously monitors the voltage and current levels being commanded to the 3-phase steering assist motor. The power steering control module compares the desired and actual current levels to detect malfunctions in the internal power steering assist motor circuits.
C0475 59
The power steering control module continuously monitors the thermal cycle counter of the steering gear. If the thermal cycle counter exceeds the maximum allowable limit, the steering gear has reached the end of its predetermined lifecycle and must be replaced.
Conditions for Running the DTC
The ignition is ON.
Conditions for Setting the DTC
C0475 00
The power steering control module detects a short to ground, short to voltage, or an open/high resistance on any of the internal power steering assist motor circuits.
C0475 59
The power steering control module detects the thermal cycle counter has exceeded the maximum allowable limit indicating that the whole steering gear system must be replaced.
Action Taken When the DTC Sets
| • | The DTC is stored in memory. |
| • | The driver information centre displays the SERVICE POWER STEERING warning message. |
Conditions for Clearing the DTC
C0475 00
| • | A current DTC will clear on the next malfunction free ignition cycle. |
| • | A history DTC will clear after 40 consecutive malfunction free ignition cycles. |
C0475 59
This DTC cannot be cleared. The power steering system must be replaced.
Reference Information
Schematic Reference
Power Steering Schematics
Connector End View Reference
Component Connector End Views
Description and Operation
Power Steering System Description and Operation : Electronic Power Steering → Hydraulic Power Steering
Electrical Information Reference
Scan Tool Reference
Control Module References for scan tool information
Circuit/System Verification
C0475 00
- Ignition OFF, disconnect the X1 harness connector at the K43 Power Steering Control Module.
- Test for less than 1 Ω between the ground circuit terminal 1 and ground.
| ⇒ | If greater than the specified range, test the ground circuit for an open/high resistance. |
- Ignition ON, verify that a test lamp illuminates between the B+ circuit terminal 2 and ground.
| ⇒ | If the test lamp does not illuminate, test the B+ circuit for a short to ground or an open/high resistance. |
- If all circuits test normal, replace the K43 Power Steering Control Module.
C0475 59
Verify that DTC C0475 59 is not set.
| ⇒ | If the DTC is set, replace the steering gear. |
Repair Instructions
Perform the Diagnostic Repair Verification after completing the diagnostic procedure.
| © Copyright Chevrolet. All rights reserved |
| © Copyright Chevrolet. All rights reserved |
