U0126

U0126-LOST COMMUNICATION WITH STEERING ANGLE SENSOR





- When Monitored:
- With the ignition on
- Battery voltage between 10 and 16 volts
- IOD fuse installed
- FCM is configured correctly
- Set Condition:
Bus messages not received from the Steering Angle Sensor for approximately 500ms.

Possible Causes
CAN B OR CAN C BUS CIRCUITS OPEN OR SHORTED
DTCS RELATED TO BATTERY VOLTAGE, IGNITION, OR VIN MESSAGES
FCM NOT CONFIGURED CORRECTLY
STEERING ANGLE SENSOR
STEERING ANGLE SENSOR POWER AND GROUND
MODULE THAT SET THIS DTC

Diagnostic Test
1. VERIFY DTC IS ACTIVE





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

With the scan tool, read active DTCs.
Is this DTC active?
Yes >> Go To 2
No >> Refer to the Stored Lost Communication test procedure. Stored Lost Communication DTCs Perform BODY VERIFICATION TEST - VER 1. Body Verification Test

2. CHECK FOR ANY OF THE FOLLOWING ACTIVE DTCS





With the scan tool, read all active DTCs from all modules.

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

Does the scan tool display any active DTCs to the conditions listed above?
Yes >> Diagnose and repair the DTC. Perform BODY VERIFICATION TEST - VER 1. Body Verification Test
No >> Go To 3

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





Turn the ignition on.
With the scan tool, select Network Diagnostics.
Verify that the Steering Angle Sensor is active on the bus.
Is the Steering Angle Sensor active on the bus?
Yes >> Go To 4
No >> Refer to Manufacturer Code Charts / Communications for the No Response test procedure. Perform BODY VERIFICATION TEST - VER 1. Body Verification Test

4. CHECK FOR ADDITIONAL COMMUNICATION RELATED DTCS





With the scan tool, select Network Diagnostics.
Is there more than one module with active DTCs Logged Against the STEERING ANGLE SENSOR?
Yes >> Replace/update the Steering Angle Sensor. Perform BODY VERIFICATION TEST - VER 1. Body Verification Test
No >> Replace/update the module that set this DTC. Perform BODY VERIFICATION TEST - VER 1. Body Verification Test