Dtc U0100 Lost Communication With Ecm / Pcm A

Vehicle Interior. Corolla. Zre142 Aze141
Meter Gauge Display. Corolla. Zre142 Aze141

DESCRIPTION

WIRING DIAGRAM

INSPECTION PROCEDURE

CONFIRM DTC OUTPUT

DTC U0100 Lost Communication with ECM / PCM "A"


DESCRIPTION

The combination meter communicates with the ECM via the CAN communication line (CAN No. 1 Bus).

DTC No.
DTC Detection Condition
Trouble Area
U0100
When either of the following conditions is detected:
  1. Vehicle speed 5 km/h (3.1 mph) or more and IG voltage 10.5 V or more
  2. No communication with ECM continues for 3 seconds or more (No communication to ECM and skid control ECU continues for 60 seconds or more)
  1. CAN communication system
  2. ECM

WIRING DIAGRAM


Corolla. Zre142 Aze141.Meter Gauge Display.Meter / Gauge System. Dtc U0100 Lost Communication With Ecm / Pcm A


INSPECTION PROCEDURE

1.CONFIRM DTC OUTPUT

  1. Connect the Techstream to the DLC3.

  1. Turn the ignition switch to ON.

  1. Turn the tester on.

  1. Clear the stored DTCs by entering the following menus on the Techstream: Body Electrical / Trouble Codes.

  1. Drive the vehicle at more than 5 km/h (3.1 mph) for at least 60 seconds.

  1. Stop the vehicle.

  1. Check for DTCs (COROLLA_ZRE142 RM000000WIB0BUX.html).

    Result:
    Result
    		Proceed to
    DTC is output.
    		A
    DTC is not output.
    		B
    HINT:
    If the CAN communication system DTC U0100 and another DTC are output at the same time, perform troubleshooting for the CAN communication system DTC U0100 first.


B
USE SIMULATION METHOD TO CHECK (COROLLA_ZRE142 RM000000UZ108OX.html)
A

GO TO CAN COMMUNICATION SYSTEM (COROLLA_ZRE142 RM000000WI60ACX.html)