Toyota Camry (XV70): Lost Communication with ECM / PCM "A" (U0100,U0126,U0129,U023A)
DESCRIPTION
The power steering ECU (rack and pinion power steering gear assembly) receives signals from the ECM, steering sensor, skid control ECU (brake actuator assembly) and forward recognition camera via CAN communication.
|
DTC No. | Detection Item |
DTC Detection Condition |
Trouble Area | Warning Indicate |
Return-to-normal Condition |
Note |
|---|---|---|---|---|---|---|
| U0100 |
Lost Communication with ECM / PCM "A" |
Lost communication with ECM |
| EPS warning light: When an error occurs during steering assist, the warning light does not illuminate. For errors that occur before assist (at the time of the decision to start assist), the warning light illuminates. |
The ECU judges the system has returned to normal |
- |
| 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 |
- |
| U0129 |
Lost Communication with Brake System Control Module |
Lost communication with skid control ECU (Brake actuator assembly) |
| EPS warning light: Comes on |
The ECU judges the system has returned to normal |
- |
| 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 |
w/ Forward Recognition Camera |
PROCEDURE
|
1. | GO TO CAN COMMUNICATION SYSTEM |
(a) Go to CAN communication system.
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EPS Warning Light Circuit
DESCRIPTION Perform the following troubleshooting procedure when the EPS warning light remains on after the engine is started, but no DTCs are stored.
HINT:
If the power steering ECU (rack an
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PROCEDURE
1. CHECK
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On-vehicle Inspection
ON-VEHICLE INSPECTION PROCEDURE
1. INSPECT PARKING BRAKE ACTUATOR ASSEMBLY (a) With the ignition switch ON and the wheels not contacting the ground, operate the electric parking brake switch assembly to check the condition of the rear wheels when the electric parking brake is operating and not ope
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