Lexus ES manuals

Lexus ES: Lost Communication with ECM/PCM "A" Missing Message (U010087,U012587,U012687,U012987,U014087)

Lexus ES (XZ10) Service Manual / Engine & Hybrid System / Cruise Control / Front Camera System (for Gasoline Model) / Lost Communication with ECM/PCM "A" Missing Message (U010087,U012587,U012687,U012987,U014087)

DESCRIPTION

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

DTC No.

Detection Item

DTC Detection Condition

Trouble Area

U010087

Lost Communication with ECM/PCM "A" Missing Message

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

U012587

Lost Communication with Multi-axis Acceleration Sensor Module Missing Message

3 seconds after the engine switch is turned on (IG), 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

U012687

Lost Communication with Steering Angle Sensor Module Missing Message

3 seconds after the engine switch is turned on (IG), a communication error between the steering sensor and the forward recognition camera is detected for approximately 5 seconds or more.

CAN communication system

U012987

Lost Communication with Brake System Control Module Missing Message

3 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

U014087

Lost Communication with Body Control Module Missing Message

3 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 U010087, U012587, U012687, U012987 and U014087 are not output

A

DTC U010087, U012587, U012687, U012987 or U014087 is output

B

A

USE SIMULATION METHOD TO CHECK

B

GO TO CAN COMMUNICATION SYSTEM

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DESCRIPTION The forward recognition camera receives vehicle information from the main body ECU (multiplex network body ECU) via CAN communication. DTC U032251 is stored when the forward recognition ca

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