Dtc U0100 Lost Communication With Ecm

Vehicle Interior. Yaris. Ncp93, 131
Heating Air Conditioning. Yaris. Ncp93, 131

DESCRIPTION

INSPECTION PROCEDURE

CHECK FOR DTC (CAN COMMUNICATION SYSTEM)

DTC U0100 Lost Communication with ECM

DTC U0131 Lost Communication with Electric Power Steering ECU

DTC U0142 Lost Communication with Main Body ECU

DTC U0155 Lost Communication with Combination Meter


DESCRIPTION

The air conditioning amplifier assembly communicates with the ECM, power steering ECU assembly, main body ECU and combination meter assembly through the CAN communication system.

DTC No.
DTC Detection Condition
Trouble Area
U0100
Lost communication with ECM.
  1. CAN communication system
  2. ECM
  3. Air conditioning amplifier assembly
U0131
Lost Communication with power steering ECU assembly.
  1. CAN communication system
  2. Power steering ECU assembly
  3. Air conditioning amplifier assembly
U0142
Lost Communication with main body ECU.
  1. CAN communication system
  2. Main body ECU
  3. Air conditioning amplifier assembly
U0155
Lost communication with combination meter assembly.
  1. CAN communication system
  2. Combination meter assembly
  3. Air conditioning amplifier assembly

INSPECTION PROCEDURE

1.CHECK FOR DTC (CAN COMMUNICATION SYSTEM)

  1. Use the Techstream to check if the CAN communication system is functioning normally.

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


B
GO TO CAN COMMUNICATION SYSTEM (YARIS_NCP93 RM000001RSO05UX.html)

C
GO TO CAN COMMUNICATION SYSTEM (YARIS_NCP93 RM000001RSO066X.html)
A

USE SIMULATION METHOD TO CHECK (YARIS_NCP93 RM000000UZ309WX.html)