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

Toyota Yaris XP210 (2020-2024) Reapir and Service Manual / Vehicle Exterior / Lighting (ext) / Lighting System / 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.	Detection Item	DTC Detection Condition	Trouble Area
U010087	Lost Communication with ECM/PCM "A" Missing Message	The main body ECU (multiplex network body ECU) does not receive data from the ECM for approximately 10 seconds or more.	CAN communication system ECM
U012087	Lost Communication with Starter / Generator Control Module Missing Message	The main body ECU (multiplex network body ECU) does not receive data from the certification ECU (smart key ECU assembly) for approximately 10 seconds or more.	CAN communication system Certification ECU (smart key ECU assembly)
U012687	Lost Communication with Steering Angle Sensor Module Missing Message	The main body ECU (multiplex network body ECU) does not receive data from the steering sensor for approximately 10 seconds or more.	CAN communication system Steering sensor
U012987	Lost Communication with Brake System Control Module "A" Missing Message	The main body ECU (multiplex network body ECU) does not receive data from the skid control ECU (brake actuator assembly) for approximately 10 seconds or more.	CAN communication system Skid control ECU (brake actuator assembly)
U015187	Lost Communication with Restraints Control Module Missing Message	The main body ECU (multiplex network body ECU) does not receive data from the airbag sensor assembly for approximately 10 seconds or more.	CAN communication system Airbag sensor assembly
U015587	Lost Communication with Instrument Panel Cluster (IPC) Control Module	The main body ECU (multiplex network body ECU) does not receive data from the combination meter assembly for approximately 10 seconds or more.	CAN communication system Combination meter assembly
U016487	Lost Communication with HVAC Control Module Missing Message	The main body ECU (multiplex network body ECU) does not receive data from the air conditioning amplifier assembly for approximately 10 seconds or more.	CAN communication system Air conditioning amplifier assembly
U016887	Lost Communication with Vehicle Security Control Module Missing Message	The main body ECU (multiplex network body ECU) does not receive data from the certification ECU (smart key ECU assembly) for approximately 10 seconds or more.	CAN communication system Certification ECU (smart key ECU assembly)

PROCEDURE

CLEAR DTC

(a) Clear the DTCs.

Body Electrical > Main Body > Clear DTCs

2.	CHECK FOR DTC

(a) Turn the ignition switch to ON.

(b) Wait 20 seconds or more.

(d) Enter the following menus: Body Electrical / Main Body / Trouble Codes.

(e) Check for DTCs.

Body Electrical > Main Body > Trouble Codes

Result	Proceed to
DTC are not output	A
U010087, U012087, U012687, U012987, U015187, U015587, U016487 or U016887 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

Low Beam LH Circuit Voltage Out of Range (B24441C,B24451C)

DESCRIPTION The BIN resistance is equipped for the purpose of correcting variances in brightness (luminous flux) when the light control LED ECU is energizing the LED with a constant current to illuminate it...

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...

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