Dtc U0100 Lost Communication With Ecm / Pcm A

Vehicle Interior. Yaris. Ncp93, 131
Meter Gauge Display. Yaris. Ncp93, 131

DESCRIPTION

WIRING DIAGRAM

INSPECTION PROCEDURE

CONFIRM DTC OUTPUT

DTC U0100 Lost Communication with ECM / PCM "A"


DESCRIPTION

The combination meter assembly and the ECM exchange signals through the CAN communication system.

DTC No.
DTC Detecting Conditions
Trouble Areas
U0100
When either of following conditions detected:
  1. Vehicle speed 3.1 mph (5 km/h) or more and IG voltage 10.5 V or more
  2. No communication with ECM continues for 3 seconds or more (Communication with neither ECM nor skid control ECU for 60 seconds or more)
  1. CAN communication system
  2. ECM

WIRING DIAGRAM


Yaris. Ncp93, 131.Meter Gauge Display.Meter / Gauge System (For Sedan). 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 ON and turn the tester ON.

  1. Clear the stored DTCs by selecting the following menu items on the tester: Body Electrical / Combination Meter / Trouble Codes.

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

  1. Stop the vehicle.

  1. Check for DTCs.

    Result:
    Result
    		Proceed to
    DTC output
    		A
    DTC not output
    		B


B
SYSTEM IS OK
A

GO TO CAN COMMUNICATION SYSTEM (YARIS_NCP93 RM000001D3500JX.html)