Lexus RX (RX 350L, RX450h) 2016-2024 Repair Manual: Lost Communication with ECM / PCM "A" (U0100,U0126,U0129,U0140,U0163,U0233,U1110)

Lexus RX (RX 350L, RX450h) 2016-2024 Repair Manual / Audio & Visual & Telematics / Park Assist / Monitoring / Parking Assist Monitor System / Lost Communication with ECM / PCM "A" (U0100,U0126,U0129,U0140,U0163,U0233,U1110)

DESCRIPTION

These DTCs are stored if there is a malfunction in the CAN communication system connected to the rear television camera assembly.

HINT:

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

DTC No.

Detection Item

DTC Detection Condition

Trouble Area

U0100

Lost Communication with ECM / PCM "A"

Lost Communication with ECM

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 skid control ECU

CAN communication system

U0140

Lost Communication with Body Control Module

Lost communication with main body ECU (multiplex network body ECU)

CAN communication system

U0163

Lost Communication with Navigation Control Module

Lost communication with radio receiver assembly

CAN communication system

U0233

Lost Communication with Blind Spot Monitor Master Module

Lost communication with blind spot monitor sensor LH

CAN communication system

U1110

Lost Communication with Intuitive Parking Assist Module

Lost communication with clearance warning ECU assembly

CAN communication system

PROCEDURE

1.

CHECK DTC OUTPUT

(a) Clear the DTCs.

Click here

Chassis > Rear Camera > Clear DTCs

(b) Recheck for DTCs and check that no DTCs are output.

Click here

Chassis > Rear Camera > Trouble Codes

HINT:

  • If CAN communication system DTCs are stored, they may also be stored in other systems.
  • If the CAN communication system has been inspected and repaired in other systems, 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 the inspection again, even if the DTCs were not output when rechecking for DTCs.

    Click here

Result

Proceed to

DTCs are output

A

No DTCs are output

B

A

GO TO CAN COMMUNICATION SYSTEM

B

USE SIMULATION METHOD TO CHECK

    Steering Angle Initialization Incomplete (C1694)
    DESCRIPTION This DTC is stored when the rear television camera assembly judges that the maximum steering angle has not been memorized (steering angle setting is incomplete). DTC No. Detection Ite ...

    CAN Communication Failure (Message Registry) (U1000)
    DESCRIPTION This DTC is stored when the rear television camera assembly judges that it has an internal CAN malfunction. DTC No. Detection Item DTC Detection Condition Trouble Area U1000 ...

    Other materials:

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    DESCRIPTION for Optitron Meter Type: These DTCs are stored when the skid control ECU (brake actuator assembly) receives an internal malfunction signal from the yaw rate and acceleration sensor (airbag sensor assembly). for TFT Meter Type: These DTCs are stored when the skid control ECU (bra ...

    Lexus RX (RX 350L, RX450h) 2016-2024 Repair Manual > Blind Spot Monitor System: Vehicle Speed Sensor (C1A45)
    DESCRIPTION The blind spot monitor sensor receives vehicle speed signals from the skid control ECU via CAN communication. DTC No. Detection Item DTC Detection Condition Trouble Area C1A45 Vehicle Speed Sensor A fail flag is transmitted from the skid control ECU Vehicle stabilit ...

    Lexus RX (RX 350L, RX450h) 2016-{YEAR} Owners Manual

    Lexus RX (RX 350L, RX450h) 2016-{YEAR} Repair Manual

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