Toyota 4Runner manuals

Toyota 4Runner: Lost Communication with ECM (U0100,U0142,U0155)

DESCRIPTION

The air conditioning amplifier communicates with the ECM, main body ECU (multiplex network body ECU) and combination meter through the CAN communication system.

DTC Code

DTC Detection Condition

Trouble Area

U0100

Lost communication with the ECM.

  • CAN communication system
  • ECM

U0142

Lost communication with the main body ECU.

  • CAN communication system
  • Main body ECU (multiplex network body ECU)

U0155

Lost communication with the combination meter.

  • CAN communication system
  • Combination meter assembly

PROCEDURE

1.

CHECK FOR DTC (CAN COMMUNICATION SYSTEM)

(a) Use the Techstream to check if the CAN communication system is functioning normally.

Result

Result

Proceed to

CAN DTC is not output

A

CAN DTC is output

B


A

USE SIMULATION METHOD TO CHECK


B

GO TO CAN COMMUNICATION SYSTEM

Diagnostic Trouble Code Chart
DIAGNOSTIC TROUBLE CODE CHART HINT: If a trouble code is output during the DTC check, inspect the trouble areas listed for that code. For details of the code, refer to the "See page ...

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