Toyota Avalon (XX50) 2019-2022 Service & Repair Manual: Control Module Communication Bus Off (U0073,U0101,U0126,U0129,U0142,U0155,U0242,U0293)

Toyota Avalon (XX50) 2019-2022 Service & Repair Manual / Vehicle Exterior / Lighting (ext) / Lighting System(for Hv Model With Cornering Light) / Control Module Communication Bus Off (U0073,U0101,U0126,U0129,U0142,U0155,U0242,U0293)

DESCRIPTION

These DTCs are stored if a CAN communication malfunction occurs between the headlight ECU sub-assembly LH and other ECUs.

DTC No.	Detection Item	DTC Detection Condition	Trouble Area	DTC Output from
U0073	Control Module Communication Bus Off	The headlight ECU sub-assembly LH does not send/receive data.	CAN communication system	Headlight ECU sub-assembly LH
U0101	Lost Communication with TCM	The headlight ECU sub-assembly LH does not receive data from the hybrid vehicle control ECU for approximately 10 seconds or more.	CAN communication system Hybrid vehicle control ECU	Headlight ECU sub-assembly LH
U0126	Lost Communication with Steering Angle Sensor Module	The headlight ECU sub-assembly LH does not receive data from the steering sensor for approximately 10 seconds or more.	CAN communication system Steering sensor	Headlight ECU sub-assembly LH
U0129	Lost Communication with Brake System Control Module	The headlight ECU sub-assembly LH does not receive data from the skid control ECU (brake booster with master cylinder assembly) for approximately 10 seconds or more.	CAN communication system Skid control ECU (brake booster with master cylinder assembly)	Headlight ECU sub-assembly LH
U0142	Lost Communication with Body Control Module "B"	The headlight ECU sub-assembly LH does not receive data from the main body ECU (multiplex network body ECU) for approximately 10 seconds or more.	CAN communication system Main body ECU (multiplex network body ECU)	Headlight ECU sub-assembly LH
U0155	Lost Communication with Instrument Panel Cluster (IPC) Control Module	The headlight ECU sub-assembly LH does not receive data from the combination meter assembly for approximately 30 seconds or more.	CAN communication system Combination meter assembly	Headlight ECU sub-assembly LH
U0242	Lost Communication With Headlamp Control Module "B"	The headlight ECU sub-assembly LH does not receive data from the headlight ECU sub-assembly RH for approximately 10 seconds or more.	CAN communication system Headlight ECU sub-assembly RH	Headlight ECU sub-assembly LH
U0293	Lost Communication with Hybrid Vehicle Control System	The headlight ECU sub-assembly LH does not receive data from the hybrid vehicle control ECU for approximately 10 seconds or more.	CAN communication system Hybrid vehicle control ECU	Headlight ECU sub-assembly LH

PROCEDURE

CLEAR DTC

(a) Connect the Techstream to the DLC3.

(b) Turn the power switch on (IG).

(d) Enter the following menus: Body Electrical / HL AutoLeveling / Trouble Codes.

(e) Clear the DTCs.

Body Electrical > HL AutoLeveling > Clear DTCs

2.	CHECK FOR DTC

(a) Connect the Techstream to the DLC3.

(b) Turn the power switch on (IG).

(d) Turn the Techstream on.

(e) Enter the following menus: Body Electrical / HL AutoLeveling / Trouble Codes.

(f) Check for DTCs.

Body Electrical > HL AutoLeveling > Trouble Codes

OK:

DTCs are not output.

USE SIMULATION METHOD TO CHECK

GO TO CAN COMMUNICATION SYSTEM

Turn Signal Switch Circuit

Control Module Communication Bus OFF (U0073,U0126,U0142,U0155,U0182)

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Toyota Avalon (XX50) 2019-2022 Service & Repair Manual: Control Module Communication Bus Off (U0073,U0101,U0126,U0129,U0142,U0155,U0242,U0293)

Turn Signal Switch Circuit

Control Module Communication Bus OFF (U0073,U0126,U0142,U0155,U0182)

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