Lexus ES manuals

Lexus ES: Lost Communication with ECM / PCM "A" (U0100,U0125,U0126,U0129,U0142,U0293)

Lexus ES (XZ10) Service Manual / Audio & Visual & Telematics / Park Assist / Monitoring / Blind Spot Monitor System(for Hv Model) / Lost Communication with ECM / PCM "A" (U0100,U0125,U0126,U0129,U0142,U0293)

DESCRIPTION

These DTCs are stored if there is a malfunction in the CAN communication system connected to the blind spot monitor sensor.

HINT:

If CAN communication system DTCs are stored, they may also be stored for other systems.

Blind Spot Monitor Master

DTC No.

Detection Item

DTC Detection Condition

Trouble Area

U0100

Lost Communication with ECM / PCM "A"

Lost communication with hybrid vehicle control ECU

CAN communication system

U0125

Lost Communication with Yaw Rate Sensor Module

Lost communication with airbag sensor assembly

CAN communication system

U0126

Lost Communication with Steering Angle Sensor Module

Lost communication with steering sensor

CAN communication system

U0129

Lost Communication with Brake System Control Module

Lost communication with brake system

CAN communication system

U0142

Lost Communication with Body Control Module "B"

Lost communication with main body ECU

CAN communication system

U0293

Lost Communication With Hybrid Vehicle Control System

Lost communication with hybrid vehicle control ECU assembly

CAN communication system

Blind Spot Monitor Slave

DTC No.

Detection Item

DTC Detection Condition

Trouble Area

U0100

Lost Communication with ECM / PCM "A"

Lost communication with hybrid vehicle control ECU

CAN communication system

U0125

Lost Communication with Yaw Rate Sensor Module

Lost communication with airbag sensor assembly

CAN communication system

U0126

Lost Communication with Steering Angle Sensor Module

Lost communication with steering sensor

CAN communication system

U0129

Lost Communication with Brake System Control Module

Lost communication with brake system

CAN communication system

U0142

Lost Communication with Body Control Module "B"

Lost communication with main body ECU

CAN communication system

U0293

Lost Communication With Hybrid Vehicle Control System

Lost communication with hybrid vehicle control ECU assembly

CAN communication system

CAUTION / NOTICE / HINT

NOTICE:

When checking for DTCs, make sure that the blind spot monitor system is turned on.

PROCEDURE

1.

CHECK DTC

(a) Turn the power switch off.

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

(c) Recheck for DTCs and check if the same DTC is output again.

Body Electrical > Blind Spot Monitor Master > Trouble Codes Body Electrical > Blind Spot Monitor Slave > Trouble Codes

Result

Proceed to

Blind Spot Monitor Master DTCs including DTC U0232 are output.

A

Blind Spot Monitor Master DTCs other than DTC U0232 are output.

B

No DTCs are output

C

HINT:

  • If CAN communication system DTCs are stored, they may also be stored for other systems.
  • If the CAN communication system has been inspected and repaired, the DTCs will not be output when rechecking for DTCs.
  • If these DTCs are output frequently, duplicate the conditions that cause the problem symptoms and perform troubleshooting again, even though the DTC was not output when rechecking for DTCs.

    Click here

A

GO TO DTC U0232

B

GO TO CAN COMMUNICATION SYSTEM

C

USE SIMULATION METHOD TO CHECK

READ NEXT:

 Lost Communication with Blind Spot Monitor Slave Module (U0232)

DESCRIPTION This DTC is stored when the blind spot monitor sensor RH judges that there is a communication problem with the blind spot monitor sensor LH. DTC No. Detection Item DTC Detection Con

 Lost Communication with Blind Spot Monitor Master Module (U0233)

DESCRIPTION This DTC is stored when the blind spot monitor sensor LH judges that there is a communication problem with the blind spot monitor sensor RH. DTC No. Detection Item DTC Detection Con

 Software Incompatibility with Body Control Module "B" (U1331)

DESCRIPTION This DTC is stored when the destination information of the main body ECU (multiplex network body ECU) does not match that of the blind spot monitor sensors. Blind Spot Monitor Master DT

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 Installation

INSTALLATION CAUTION / NOTICE / HINT HINT: The parking brake indicator light blinks (red) when the engine switch is turned on (IG) after replacing the brake actuator assembly. Operate the electric parking brake switch assembly to turn off the parking brake indicator light. PROCEDURE 1. INSTALL BRAKE

 Power Steering ECU Communication Stop Mode

DESCRIPTION Detection Item Symptom Trouble Area Power Steering ECU Communication Stop Mode Any of the following conditions are met: Communication stop for "Power Steering (EPS)" is indicated on the "Communication Bus Check" screen of the Techstream. Click here Communication sto

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