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.
If the customer reports that the s
Check Assist Limit Record
CAUTION / NOTICE / HINT HINT: Perform this troubleshooting procedure when no DTCs are output, including DTCs related to CAN communication system malfunctions. PROCEDURE 1. READ VALUE USING TECHS
SEE MORE:
Replacement
REPLACEMENT PROCEDURE 1. REMOVE FRONT WHEEL OPENING EXTENSION PAD RH Click here 2. REMOVE FRONT WHEEL OPENING EXTENSION PAD LH Click here 3. REMOVE NO. 1 ENGINE UNDER COVER Click here 4. REMOVE NO. 2 ENGINE UNDER COVER ASSEMBLY Click here 5. REPLACE HYBRID TRANSAXLE FLUID Click here
Removal
REMOVAL PROCEDURE 1. SECURE VEHICLE (a) Fully apply the parking brake and chock a wheel. CAUTION:
Make sure to apply the parking brake and chock a wheel before performing this procedure.
If the vehicle is not secure and the shift lever is moved to N, the vehicle may suddenly move, possibly resu
