Toyota CH-R Service Manual: Control Module Communication Bus OFF (U0073,U0100,U0129,U0142)

Toyota CH-R Service Manual / Lighting (ext) / Lighting System / Control Module Communication Bus OFF (U0073,U0100,U0129,U0142)

DESCRIPTION

These DTCs are stored when the CAN communication system is malfunctioning.

DTC No.

Detection Item

DTC Detection Condition

Trouble Area

Note

U0073

Control Module Communication Bus OFF

Lost communication with CAN communication line

CAN communication system

-

U0100

Lost Communication with ECM / PCM "A"

Lost communication with ECM
  • CAN communication system
  • ECM

-

U0129

Lost Communication with Brake System Control Module

Lost communication with brake actuator assembly (skid control ECU)
  • CAN communication system
  • Brake actuator assembly (skid control ECU)

-

U0142

Lost Communication with Body Control Module "B"

Lost communication with main body ECU (multiplex network body ECU)
  • CAN communication system
  • Main body ECU (multiplex network body ECU)

-

PROCEDURE

1.

CLEAR DTC

(a) Clear the DTCs.

Click here

Body Electrical > HL AutoLeveling > Clear DTCs
NEXT

2.

CHECK FOR DTC

(a) Turn the ignition switch to ON.

(b) Check for DTCs.

Click here

Body Electrical > HL AutoLeveling > Trouble Codes

OK:

DTCs are not output.

OK

USE SIMULATION METHOD TO CHECK

NG

GO TO CAN COMMUNICATION SYSTEM

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    DESCRIPTION The headlight ECU sub-assembly LH stores this DTC when the headlight ECU sub-assembly RH detects an internal malfunction or if a communication malfunction occurs between headlight ECU ...

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