Toyota 4Runner Quiz
Vehicle Interior

Lost Communication with ECM (U0100,U0142,U0155)

In this manual: Vehicle Interior
General — 25Audio / Visual / Telematics — 283Brake — 187Drivetrain — 204Power Source / Network — 79Steering — 76Suspension — 130Vehicle Exterior — 391Vehicle Interior — 693
~1min read
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

Test yourself

A quick Toyota 4Runner quiz: every answer comes with an explanation and a link to the manual page.