U0126–LOST COMMUNICATION WITH STEERING ANGLE SENSOR

For a complete wiring diagram Refer to Section 8W.

Set Condition:
If the Anti-Lock Brakes Module fails to receive bus messages from the Steering Angle Sensor for approximately 500 ms.

Possible Causes

DTCs RELATED TO BATTERY VOLTAGE, IGNITION, OR VIN MESSAGES

CAN C BUS CIRCUITS OPEN OR SHORTED

STEERING ANGLE SENSOR POWER AND GROUND

STEERING ANGLE SENSOR

ANTI-LOCK BRAKES MODULE

1.VERIFY DTC IS ACTIVE

NOTE: Ensure the IOD fuse is installed and battery voltage is between 10 and 16 volts before proceeding.

Does this DTC reset?

Yes

The condition that caused the symptom is currently not present. Inspect the related wiring for a possible intermittent condition. Look for any chafed, pierced, pinched, or partially broken wires.
Refer to the ABS-INTERMITTENT CONDITION TEST. (Refer to 5 - BRAKES - DIAGNOSIS AND TESTING)

2.CHECK FOR ANY OF THE FOLLOWING ACTIVE DTCs

NOTE: Check for CAN C hardware electrical, VIN Missing/Mismatch, battery or ignition related DTCs.

Does the scan tool display any active DTCs related to the conditions listed above?

Yes

Diagnose and repair the DTC(s). Refer to the Table of Contents in the applicable Section.
Perform BODY VERIFICATION TEST – VER 1. (Refer to 8 - ELECTRICAL/ELECTRONIC CONTROL MODULES - STANDARD PROCEDURE).

3.VERIFY THAT THE STEERING ANGLE SENSOR IS ACTIVE ON THE BUS

Is the Steering Angle Sensor active on the bus?

Yes

Refer to the Stored Lost Communication test procedure. Refer to the table of contents in this section.
Perform BODY VERIFICATION TEST – VER 1. (Refer to 8 - ELECTRICAL/ELECTRONIC CONTROL MODULES - STANDARD PROCEDURE).

4.CHECK FOR ADDITIONAL COMMUNICATION RELATED DTCs

Is there more than one module with active DTCs “Logged Against” the STEERING ANGLE SENSOR?

Yes

Replace/update the Steering Angle Sensor in accordance with the service information.
Perform ABS VERIFICATION TEST. (Refer to 5 - BRAKES - STANDARD PROCEDURE).