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

CLEAR DTC

(a) Clear the DTCs.

Click here

Body Electrical > HL AutoLeveling > Clear DTCs

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.

USE SIMULATION METHOD TO CHECK

GO TO CAN COMMUNICATION SYSTEM

Left Headlight ECU Variation Error (B2456)

DESCRIPTION This DTC is output when a headlight ECU sub-assembly LH that is incompatible with the vehicle is installed. The headlight ECU sub-assembly LH outputs DTC B2456. DTC No. ...

Lost Communication With Headlamp Control Module "B" (U0242)

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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