Toyota Avalon (XX50) 2019-2022 Service & Repair Manual: Control Module Communication Bus Off (U0073,U0100,U0101,U0126,U0129,U0142,U0155,U0242)

Toyota Avalon (XX50) 2019-2022 Service & Repair Manual / Vehicle Exterior / Lighting (ext) / Lighting System(for Gasoline Model With Cornering Light) / Control Module Communication Bus Off (U0073,U0100,U0101,U0126,U0129,U0142,U0155,U0242)

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

U0100

Lost Communication with ECM / PCM "A"

The headlight ECU sub-assembly LH does not receive data from the ECM for approximately 10 seconds or more.
  • CAN communication system
  • ECM

Headlight ECU sub-assembly LH

U0101

Lost Communication with TCM

The headlight ECU sub-assembly LH does not receive data from the ECM for approximately 10 seconds or more.
  • CAN communication system
  • ECM

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 actuator assembly) for approximately 10 seconds or more.
  • CAN communication system
  • Skid control ECU (brake actuator 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

PROCEDURE

1.

CLEAR DTC

(a) Connect the Techstream to the DLC3.

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

(c) Turn the Techstream on.

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

(e) Clear the DTCs.

Body Electrical > HL AutoLeveling > Clear DTCs
NEXT

2.

CHECK FOR DTC

(a) Connect the Techstream to the DLC3.

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

(c) Wait 35 seconds or more.

(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.

OK

USE SIMULATION METHOD TO CHECK

NG

GO TO CAN COMMUNICATION SYSTEM

    Turn Signal Switch Circuit

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

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