Lexus ES manuals

Lexus ES: Control Module Communication Bus OFF (U0073,U0126,U0142,U0182)

Lexus ES (XZ10) Service Manual / Vehicle Interior / Lighting (ext) / Lighting System (for Gasoline Model) / Control Module Communication Bus OFF (U0073,U0126,U0142,U0182)

DESCRIPTION

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

for LED Type Turn Signal Light

DTC No.

Detection Item

DTC Detection Condition

Trouble Area

DTC Output from

U0073

Control Module Communication Bus OFF

The headlight ECU sub-assembly RH does not send/receive data.

CAN communication system

AFS (Sub)

U0126

Lost Communication with Steering Angle Sensor Module

The headlight ECU sub-assembly RH does not receive data from the steering sensor for approximately 10 seconds or more.

  • CAN communication system
  • Steering sensor

AFS (Sub)

U0142

Lost Communication with Body Control Module "B"

The headlight ECU sub-assembly RH 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)

AFS (Sub)

U0182

Lost Communication With Lighting Control Module Front

The headlight ECU sub-assembly RH does not receive data from the headlight ECU sub-assembly LH for approximately 10 seconds or more.

  • CAN communication system
  • Headlight ECU sub-assembly LH

AFS (Sub)

for Bulb Type Turn Signal Light

DTC No.

Detection Item

DTC Detection Condition

Trouble Area

DTC Output from

U0073

Control Module Communication Bus OFF

The headlight ECU sub-assembly RH does not send/receive data.

CAN communication system

HL AutoLeveling (Sub)

U0126

Lost Communication with Steering Angle Sensor Module

The headlight ECU sub-assembly RH does not receive data from the steering sensor for approximately 10 seconds or more.

  • CAN communication system
  • Steering sensor

HL AutoLeveling (Sub)

U0142

Lost Communication with Body Control Module "B"

The headlight ECU sub-assembly RH 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)

HL AutoLeveling (Sub)

U0182

Lost Communication With Lighting Control Module Front

The headlight ECU sub-assembly RH does not receive data from the headlight ECU sub-assembly LH for approximately 10 seconds or more.

  • CAN communication system
  • Headlight ECU sub-assembly LH

HL AutoLeveling (Sub)

PROCEDURE

1.

CONFIRM MODEL

(a) Choose the model to be inspected.

Result

Proceed to

for LED Type Turn Signal Light

A

for Bulb Type Turn Signal Light

B

B

GO TO STEP 4

A

2.

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 / AFS (Sub) / Trouble Codes.

(e) Clear the DTCs.

Body Electrical > AFS (Sub) > Clear DTCs
NEXT

3.

CHECK FOR DTC

(a) Connect the Techstream to the DLC3.

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

(c) Wait 20 seconds or more.

(d) Turn the Techstream on.

(e) Enter the following menus: Body Electrical / AFS (Sub) / Trouble Codes.

(f) Check for DTCs.

Body Electrical > AFS (Sub) > Trouble Codes

OK:

DTCs are not output.

OK

USE SIMULATION METHOD TO CHECK

NG

GO TO CAN COMMUNICATION SYSTEM

4.

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 (Sub) / Trouble Codes.

(e) Clear the DTCs.

Body Electrical > HL AutoLeveling (Sub) > Clear DTCs
NEXT

5.

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 (Sub) / Trouble Codes.

(f) Check for DTCs.

Body Electrical > HL AutoLeveling (Sub) > Trouble Codes

OK:

DTCs are not output.

OK

USE SIMULATION METHOD TO CHECK

NG

GO TO CAN COMMUNICATION SYSTEM

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