Dtc U0100 Lost Communication With Ecm / Pcm A

Steering. Yaris. Ncp93, 131
Power Assist Systems. Yaris. Ncp93, 131

DESCRIPTION

INSPECTION PROCEDURE

CONFIRM DTC

DTC U0100 Lost Communication with ECM / PCM "A"

DTC U0129 Lost Communication with Brake System Control Module


DESCRIPTION

The power steering ECU assembly receives signals from the ECM and the brake actuator assembly (skid control ECU) via the CAN communication system.

DTC No.
DTC Detection Condition
Trouble Area
U0100
ECM communication error
  1. CAN communication system
  2. ECM
U0129
Skid control ECU communication error
  1. CAN communication system
  2. Brake actuator assembly (Skid control ECU)

INSPECTION PROCEDURE

1.CONFIRM DTC

  1. Check for DTCs (YARIS_NCP93 RM000001AL601KX.html ).

    Result
    Result
    		Proceed to
    DTC is not output
    		A
    DTC is output (for Hatchback except Separate Type Yaw Rate Sensor)
    		B
    DTC is output (for Hatchback with Separate Type Yaw Rate Sensor)
    		C



B
GO TO CAN COMMUNICATION SYSTEM (HOW TO PROCEED WITH TROUBLESHOOTING) (YARIS_NCP93 RM000001RSO05UX.html)

C
GO TO CAN COMMUNICATION SYSTEM (HOW TO PROCEED WITH TROUBLESHOOTING) (YARIS_NCP93 RM000001RSO066X.html)
A

USE SIMULATION METHOD TO CHECK (YARIS_NCP93 RM000000UZ309WX.html)