Lexus ES manuals

Lexus ES: Lost Communication with ECM / PCM "A" (U0100,U0126,U0129,U0132,U023A)

Lexus ES (XZ10) Service Manual / Steering / Power Assist Systems / Power Steering System(for Gasoline Model) / Lost Communication with ECM / PCM "A" (U0100,U0126,U0129,U0132,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), AVS ECU (absorber control ECU) 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

  • CAN communication system
  • ECM
  • Rack and pinion power steering gear assembly

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

  • CAN communication system
  • Steering sensor
  • Rack and pinion power steering gear assembly

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)

  • CAN communication system
  • Skid control ECU (Brake actuator assembly)
  • Rack and pinion power steering gear assembly

EPS warning light: Comes on

The ECU judges the system has returned to normal

-

U0132

Lost Communication with Ride Level Control Module

Lost communication with AVS ECU (absorber control ECU)

  • CAN communication system
  • AVS ECU (Absorber control ECU)
  • Rack and pinion power steering gear assembly

EPS warning light: Does not come on

The ECU judges the system has returned to normal

w/ Adaptive Variable Suspension System

U023A

Lost Communication with Front Camera Module

Lost communication with forward recognition camera

  • CAN communication system
  • Forward recognition camera
  • Rack and pinion power steering gear assembly

EPS warning light: Does not come on

The ECU judges the system has returned to normal

-

PROCEDURE

1.

GO TO CAN COMMUNICATION SYSTEM

(a) Go to CAN communication system.

Click here

NEXT

END

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