C1290

DTC C1290

Diagnostic Instructions

* Perform the Diagnostic System Check - Vehicle (Initial Inspection and Diagnostic Overview) prior to using this diagnostic procedure.
* Review Strategy Based Diagnosis (Initial Inspection and Diagnostic Overview) for an overview of the diagnostic approach.
* Diagnostic Procedure Instructions (Initial Inspection and Diagnostic Overview) provides an overview of each diagnostic category.

DTC Descriptor
DTC C1290
- Steering Angle Sensor Malfunction

Circuit/System Description

The electronic brake control module (EBCM) monitors the steering position sensor every time the ignition is turned ON and the vehicle is driven at 35 km/h (22 mph) or more for 5 seconds. The BCM also stores the previous zero point.

Conditions for Running the DTC

The vehicle speed is at least 35 km/h (22 mph) for 5 seconds.

Conditions for Setting the DTC

The steering position sensor zero point vastly differs from recorded value.

Action Taken When the DTC Sets

* The ABS warning indicator turns ON.
* The ABS is disabled.
* The vehicle stability control (VSC) warning indicator turns ON.
* The VSC is disabled.

Conditions for Clearing the DTC

The condition responsible for setting the DTC no longer exists and the scan tool Clear DTCs function is used.

Reference Information
Schematic Reference

Antilock Brake System Schematics ([1][2]Antilock Brakes / Traction Control Systems)
Connector End View Reference

Component Connector End Views (Connector Views)
Description and Operation

ABS Description and Operation (Description and Operation)
Electrical Information Reference

* Circuit Testing (Component Tests and General Diagnostics)
* Connector Repairs (Component Tests and General Diagnostics)
* Testing for Intermittent Conditions and Poor Connections (Component Tests and General Diagnostics)
* Wiring Repairs (Component Tests and General Diagnostics)

Scan Tool Reference

Control Module References (Programming and Relearning) for scan tool information

Circuit/System Verification

1. Using a scan tool, perform yaw rate sensor calibration.
2. Drive the vehicle at 35 km/h (22 mph) for 5 seconds and verify steering wheel is correctly centered.

• If steering wheel is not correctly centered, check for proper wheel alignment.

• If steering wheel is correctly centered, replace the EBCM/BPMV.

Repair Instructions

Perform the Diagnostic Repair Verification (Verification Tests) after completing the diagnostic procedure.

* Brake Pressure Modulator Valve Replacement (Service and Repair)
* Control Module References (Programming and Relearning) for EBCM replacement, setup, and programming