Inspection Procedure
WARNING: This page is about a different car, the 2008 Lexus IS F. However, it is still accessible from the selected car via links, so may be relevant.
- CHECK DTC OUTPUT
- Check if DTC U0121 is output
Result
RESULT CHARTResult Proceed to DTC is not output A DTC U0191 is output B HINT
DTC U0129 indicates a skid control ECU communication malfunction in the electronic power steering system
B: GO TO CAN COMMUNICATION SYSTEM (See HOW TO PROCEED WITH TROUBLESHOOTING )
A: Go to next Step
- Check if DTC U0121 is output
- CHECK DTC OUTPUT
- Check for DTCs of the VSC system
Result
RESULT CHARTResult Proceed to DTC is not output A DTC C0200, C0205, C0210, C0215, C1235, C1236, C1238, or C1239 is output B HINT
These DTCs indicate a speed sensor signal malfunction in the VSC system (See DTC CHECK / CLEAR )
NOTE: If replacing the power steering ECU assembly, initialize the rotation angle sensor value and calibrate the torque sensor zero point (See CALIBRATION ).B: GO TO BRAKE CONTROL SYSTEM (SPEED SENSOR CIRCUIT) (See DIAGNOSTIC TROUBLE CODE CHART )
A: REPLACE POWER STEERING ECU ASSEMBLY (See POWER STEERING ECU )
- Check for DTCs of the VSC system