Toyota Avalon (XX50) 2019-2022 Service & Repair Manual: Lost Communication with TCM (U0101,U0123,U0129,U0142,U0293)

Toyota Avalon (XX50) 2019-2022 Service & Repair Manual / Engine / Cruise Control / Front Camera System(for Hv Model) / Lost Communication with TCM (U0101,U0123,U0129,U0142,U0293)

DESCRIPTION

When a malfunction is detected between various ECUs and sensors, these DTCs are stored.

DTC No.

Detection Item

DTC Detection Condition

Trouble Area

U0101

Lost Communication with TCM

While the vehicle is being driven at 1 km/h or 1 mph or more, a communication error between the TCM (hybrid vehicle control ECU) and the forward recognition camera is detected for approximately 5 seconds or more.

CAN communication system

U0123

Lost Communication with Yaw Rate Sensor Module

While the vehicle is being driven at 1 km/h or 1 mph or more, a communication error between the yaw rate sensor (airbag ECU assembly) and the forward recognition camera is detected for approximately 5 seconds or more.

CAN communication system

U0129

Lost Communication with Brake System Control Module

2 seconds after the power switch is turned on (IG), a communication error between the skid control ECU (brake booster with master cylinder assembly) and the forward recognition camera is detected for approximately 5 seconds or more.

CAN communication system

U0142

Lost Communication with Body Control Module "B"

2 seconds after the power switch is turned on (IG), a communication error between the main body ECU (multiplex network body ECU) and the forward recognition camera is detected for approximately 5 seconds or more.

CAN communication system

U0293

Lost Communication with HV ECU

2 seconds after the power switch is turned on (IG), a communication error between the hybrid vehicle control ECU and the forward recognition camera is detected for approximately 5 seconds.

CAN communication system

PROCEDURE

1.

CHECK FOR DTCs

(a) Clear the DTCs.

Chassis > Front Recognition Camera > Clear DTCs

(b) Make sure that the DTC detection conditions are met.

HINT:

If the detection conditions are not met, the system cannot detect the malfunction.

(c) Check for DTCs.

Chassis > Front Recognition Camera > Trouble Codes

Result

Proceed to

DTC U0101, U0123, U0129, U0142 and U0293 are not output

A

DTC U0101, U0123, U0129, U0142 or U0293 is output

B

A

USE SIMULATION METHOD TO CHECK

B

GO TO CAN COMMUNICATION SYSTEM

    Terminals Of Ecu

    Lost Communication with Cruise Control Front Distance Range Sensor (U0235)

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