Lexus RX (RX 350L, RX450h) 2016-2025 Repair Manual: Lost Communication with ECM / PCM "A" (U0100,U0129,U023A)

Lexus RX (RX 350L, RX450h) 2016-2025 Repair Manual / Steering / Power Assist Systems / Power Steering System / Lost Communication with ECM / PCM "A" (U0100,U0129,U023A)

DESCRIPTION

The power steering ECU assembly receives signals from the ECM, skid control ECU (brake actuator assembly) and forward recognition camera (w/ forward recognition camera system) 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

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

-

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)

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

  • CAN communication system
  • Forward recognition camera

EPS warning light: Comes 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.

Click here

NEXT

END

    Terminals Of Ecu
    TERMINALS OF ECU CHECK POWER STEERING ECU ASSEMBLY *a Component without harness connected (Power Steering ECU Assembly) - - (a) Measure the voltage and resistance according to the value(s ...

    Steering Column
    ...

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