Toyota Avalon (XX50) 2019-2022 Service & Repair Manual: Lost Communication with ECM / PCM "A" (U0100,U0101,U0123,U0129,U0142)

Toyota Avalon (XX50) 2019-2022 Service & Repair Manual / Engine / Cruise Control / Front Camera System(for Gasoline Model) / Lost Communication with ECM / PCM "A" (U0100,U0101,U0123,U0129,U0142)

DESCRIPTION

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

DTC No.

Detection Item

DTC Detection Condition

Trouble Area

U0100

Lost Communication with ECM / PCM "A"

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

CAN communication system

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 (ECM) 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 engine switch is turned on (IG), a communication error between the skid control ECU (brake actuator 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 engine 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

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 U0100, U0101, U0123, U0129 and U0142 are not output

A

DTC U0100, U0101, U0123, U0129 or U0142 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)

    See More:

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