Lexus ES manuals

Lexus ES: Control Module Communication Bus Off (U0073,U0100,U0101,U0126,U0129,U0142,U0155,U0242)

Lexus ES (XZ10) Service Manual / Vehicle Exterior / Lighting (ext) / Lighting System (for Gasoline Model) / 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.

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 LH does not send/receive data.

CAN communication system

AFS

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

AFS

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

AFS

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

AFS

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)

AFS

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)

AFS

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

AFS

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

AFS
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 LH does not send/receive data.

CAN communication system

HL AutoLeveling

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

HL AutoLeveling

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

HL AutoLeveling

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

HL AutoLeveling

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)

HL AutoLeveling

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)

HL AutoLeveling

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

HL AutoLeveling

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

HL AutoLeveling

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 / Trouble Codes.

(e) Clear the DTCs.

Body Electrical > AFS > Clear DTCs
NEXT

3.

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 / AFS / Trouble Codes.

(f) Check for DTCs.

Body Electrical > AFS > 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 / Trouble Codes.

(e) Clear the DTCs.

Body Electrical > HL AutoLeveling > 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 / 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

READ NEXT:

 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 D

 Lost Communication With ECM/PCM "A" (U0100,...,U1117)

DESCRIPTION These DTCs are stored if a CAN communication malfunction occurs between the main body ECU (multiplex network body ECU) and other ECUs. DTC No. Detection Item DTC Detection Condition

 Lost Communication with ECM/PCM "A" Missing Message (U010087,U012587,U012987,U014087)

DESCRIPTION These DTCs are stored if a CAN communication malfunction occurs between the forward recognition camera and other ECUs. DTC No. Detection Item DTC Detection Condition Trouble Area

SEE MORE:

 Data List / Active Test

DATA LIST / ACTIVE TEST DATA LIST NOTICE: In the table below, the values listed under "Normal Condition" are reference values. Do not depend solely on these reference values when deciding whether a part is faulty or not. HINT: Using the Techstream to read the Data List allows the values or states of

 Check Bus 4 Line for Short to GND

DESCRIPTION There may be a short circuit between one of the CAN bus lines and GND when there is no resistance between terminal 22 (CA2H) of the central gateway ECU (network gateway ECU) and terminal 4 (CG) of the DLC3, or terminal 7 (CA2L) of the central gateway ECU (network gateway ECU) and termina

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