Lexus ES: Lost Communication With Steering Angle Sensor Module (U0126,U0129,U023A,U0293)
DESCRIPTION
The power steering ECU (rack and pinion power steering gear assembly) receives signals from the hybrid vehicle control ECU, steering sensor, skid control ECU (brake booster with master cylinder assembly) and forward recognition camera via CAN communication.
| DTC No. | Detection Item | DTC Detection Condition | Trouble Area | Warning Indicate | Return-to-normal Condition | Note |
|---|---|---|---|---|---|---|
| U0126 | Lost Communication With Steering Angle Sensor Module | Lost communication with steering angle sensor |
| EPS warning light: Comes on | The ECU judges the system has returned to normal or the power switch is turned on (IG) again | - |
| U0129 | Lost Communication with Brake System Control Module | Lost communication with skid control ECU (Brake booster with master cylinder assembly) |
| EPS warning light: Comes on | The ECU judges the system has returned to normal or the power switch is turned on (IG) again | - |
| U023A | Lost Communication with Front Camera Module | Lost communication with forward recognition camera |
| EPS warning light: Does not come on | The ECU judges the system has returned to normal or the power switch is turned on (IG) again | - |
| U0293 | Lost Communication with Hybrid Control Module | Lost communication with hybrid vehicle control ECU |
| EPS warning light: Does not come on | The ECU judges the system has returned to normal or the power switch is turned on (IG) again | - |
PROCEDURE
| 1. | GO TO CAN COMMUNICATION SYSTEM |
(a) Go to CAN communication system.
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EPS Warning Light Circuit
CAUTION / NOTICE / HINT NOTICE:
Perform this troubleshooting procedure when no DTCs are output, including DTCs related to CAN communication system malfunctions.
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Software Incompatibility with Brake System Control Module Invalid/Incompatible Software Component (U031857)
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