Toyota Yaris: Lighting System / Lost Communication With ECM/PCM "A" Missing Message (U010087,U012687,U012987,U013487,U014087)

Toyota Yaris XP210 (2020-2024) Reapir and Service Manual / Vehicle Exterior / Lighting (ext) / Lighting System / Lost Communication With ECM/PCM "A" Missing Message (U010087,U012687,U012987,U013487,U014087)

DESCRIPTION

These DTCs are stored if a CAN communication malfunction occurs between the forward recognition camera and other ECUs.

DTC No.	Detection Item	DTC Detection Condition	Trouble Area
U010087	Lost Communication With ECM/PCM "A" Missing Message	The forward recognition camera does not receive data from the ECM for approximately 5 seconds or more.	CAN communication system ECM
U012687	Lost Communication with Steering Angle Sensor Module Missing Message	The forward recognition camera does not receive data from the steering sensor for approximately 5 seconds or more.	CAN communication system Steering sensor
U012987	Lost Communication with Brake System Control Module Missing Message	The forward recognition camera does not receive data from the skid control ECU (brake actuator assembly) for approximately 5 seconds or more.	CAN communication system Skid control ECU (brake actuator assembly)
U013487	Lost Communication with Power Steering Control Module Rear Missing Message	The forward recognition camera does not receive data from the power steering ECU assembly for approximately 5 secondsor more.	CAN communication system Power steering ECU assembly
U014087	Lost Communication with Body Control Module Missing Message	The forward recognition camera does not receive data from the main body ECU (multiplex network body ECU) for approximately 5 seconds or more.	CAN communication system Main body ECU (multiplex network body ECU)

PROCEDURE

CLEAR DTC

(a) Clear the DTCs.

Body Electrical > Front Recognition Camera (Front Lighting Control) > Clear DTCs

2.	CHECK FOR DTC

(a) Turn the ignition switch to ON.

(b) Wait 10 seconds or more.

(d) Enter the following menus: Body Electrical / Front Recognition Camera (Front Lighting Control) / Trouble Codes.

(e) Check for DTCs.

Body Electrical > Front Recognition Camera (Front Lighting Control) > Trouble Codes

Result	Proceed to
DTC are not output	A
U010087, U012687, U012987, U014087 or U029387 are output	B
None of the above conditions are met	C

USE SIMULATION METHOD TO CHECK

GO TO CAN COMMUNICATION SYSTEM

GO TO DIAGNOSTIC TROUBLE CODE CHART

Lost Communication with ECM/PCM "A" Missing Message (U010087,U012087,U012687,U012987,U015187,U015587,U016487,U016887)

DESCRIPTION These DTCs are stored if a CAN communication malfunction occurs between the main body ECU (multiplex network body ECU) and other ECUs. DTC No...

Lost Communication with Cruise Control Front Distance Range Sensor Signal Sensor or Center Missing Message (U023587)

DESCRIPTION The forward recognition camera and millimeter wave radar sensor assembly communicate via CAN communication. If there is an error in the communication with the millimeter wave radar sensor assembly, the forward recognition camera stores DTC U023587...

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