System
A -- CHECK FOR INTERMITTENT PROBLEMS See: Accessories and Optional Equipment/Antitheft and Alarm
Systems/Diagrams/Diagnostic Aids/How To Troubleshoot ECU Controlled Systems/How To Proceed With Troubleshooting
4. REPAIR OR REPLACE HARNESS OR CONNECTOR
(a) Turn the engine switch off.
(b) Repair or replace the harness or connector.
(c) Check for any momentary interruption between the skid control ECU and each sensor or ECM See: Brakes and Traction
Control/Antilock Brakes / Traction Control Systems/Testing and Inspection/Component Tests and General Diagnostics/Check for
Intermittent Problems.
(d) Check that there are no momentary interruptions.
NEXT -- Continue to next step.
5. RECONFIRM DTC
(a) Turn the engine switch off.
(b) Clear the DTCs See: Brakes and Traction Control/Antilock Brakes / Traction Control Systems/Testing and Inspection/Reading and
Clearing Diagnostic Trouble Codes.
(c) Start the engine.
(d) Drive the vehicle and turn the steering wheel to the right and left at a speed of 15 km/h (9 mph) or more.
(e) Check that no CAN communication system DTC is output See: Powertrain Management/Computers and Control
Systems/Information Bus/Testing and Inspection/Initial Inspection and Diagnostic Overview/CAN Communication System/Diagnosis
System.
(f) If ABS and/or VSC system DTCs are output, record them.
Result:
HINT
The CAN communication system must be normal when performing troubleshooting for each sensor DTC (for ABS and/or VSC
system).
C -- INSPECT CAN COMMUNICATION SYSTEM See: Powertrain Management/Computers and Control Systems/Information
Bus/Testing and Inspection/Initial Inspection and Diagnostic Overview/CAN Communication System/How to Proceed With
Troubleshooting
B -- REPAIR CIRCUIT INDICATED BY OUTPUT DTC See: Diagnostic Trouble Code Descriptions/Vehicle Stability Control
System
A -- END
Up to 08/2009
BRAKE CONTROL / DYNAMIC CONTROL SYSTEMS: VEHICLE STABILITY CONTROL SYSTEM:
U0073,U0100,U0123,U0124,U0126: Control Module Communication Bus OFF
U0126 - Lost Communication with Steering Angle Sensor Module
DESCRIPTION
The skid control ECU receives signals from the ECM, steering angle sensor, and yaw rate and acceleration sensor via the CAN communication
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