Buick Regal: DTC C1436

Diagnostic Instructions

• Perform the Diagnostic System Check prior to using this diagnostic procedure:Diagnostic System Check - Vehicle
• Review the description of Strategy Based Diagnosis:Strategy Based Diagnosis
• An overview of each diagnostic category can be found here:Diagnostic Procedure Instructions

DTC Descriptor

DTC C1436

Steering Wheel Angle Sensor Signal

Symptom Byte Information: Symptom Byte List.

Circuit/System Description

For an overview of the component/system, refer to:ABS Description and Operation.

Conditions for Running the DTC

Electronic Brake Control Module in Initialization Mode

• Ignition Voltage=Greater than 8 V
• The vehicle speed is greater than 20 km/h (12 MPH).

Conditions for Setting the DTC

Symptom Byte:09

Steering Wheel Angle Sensor Signal = Not Plausible

Symptom Byte:0A

Steering Wheel Angle Sensor Signal = Constant

Symptom Byte:11

Steering Wheel Angle Sensor Signal = Out Of Range

Actions Taken When the DTC Sets

One or more of the following may occur:

• Traction/Stability Control Indicator = On
• P9 Driver Information Center Display = Service Stability Control
• P9 Driver Information Center Display = Service Brake Assist
• P9 Driver Information Center Display = Service Power Steering
• Traction Control & Vehicle Stability Control = Disabled

Conditions for Clearing the DTC

• A current DTC will clear when the diagnostic runs and passes.
• A history DTC will clear after 40 consecutive malfunction-free ignition cycles.

Diagnostic Aids

• Check the tire inflation pressure and adjust to the tire inflation specifications as necessary.
• The vehicle should not pull in either direction causing the steering wheel to be off center while driving in a straight line on a level.
• Confirm that all tires are of the proper size and the same model and brand. If a mis-sized or nonmatching tire model is present, inform the customer that in order for the vehicle stability system to function normally, tires need to have a uniform size and rolling diameter.
• Inspect the serial data circuits and connections at the power steering control module and the electronic brake control module. They should be free from sources of electromagnetic interference and the connections should be clean and tight.

Reference Information

Schematic Reference

Antilock Brake System Wiring Schematics

Connector End View Reference

COMPONENT CONNECTOR END VIEW INDEX

Electrical Information Reference

• Circuit Testing
• Connector Repairs
• Testing for Intermittent Conditions and Poor Connections
• Wiring Repairs

Scan Tool Reference

Control Module References

Circuit/System Verification

1. Ignition = On.

2. Verify there are no DTCs set related to the following system/component: K43 Power Steering Control Module.

• If a related DTC is set

Refer to:Diagnostic Trouble Code (DTC) List - Vehicle

• Go to next step: If a related DTC is not set

1. Verify DTC U0126, U0130, U0131 is not set.
   • If DTC U0126, U0130, U0131 is set

     Refer to:Diagnostic Trouble Code (DTC) List - Vehicle

   • Go to next step: If a DTC was not set
2. Verify DTC C0035-C0050 is not set. - Electronic Brake Control Module
   • If DTC C0035-C0050 is set

     Refer to:Diagnostic Trouble Code (DTC) List - Vehicle

   • Go to next step: If a DTC was not set

3. Perform the following procedure/test:Steering Wheel Angle Sensor Centering

• If the repair corrected the DTC/symptom

All OK.

• Go to next step: If the repair did not correct the DTC/symptom

4. Replace the component: Steering Gear

• If the repair corrected the DTC/symptom

All OK.

• Go to next step: If the repair did not correct the DTC/symptom

5. Replace the component: K17 Electronic Brake Control Module.

6. All OK.

Repair Instructions

Perform the Diagnostic Repair Verification after completing the repair: Diagnostic Repair Verification

• Electric Dual Pinion Rack and Pinion Steering Gear Replacement
• For control module replacement, programming, and setup refer to: Control Module References

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