Toyota Yaris: Pre-collision System / Lost Communication with ECM/PCM "A" Missing Message (U010087,U010187,U012687,U012987,U015587)

Toyota Yaris XP210 (2020-2024) Reapir and Service Manual / Vehicle Interior / Pre-collision / Pre-collision System / Lost Communication with ECM/PCM "A" Missing Message (U010087,U010187,U012687,U012987,U015587)

DESCRIPTION

The following DTCs are stored when there is a communication malfunction between the millimeter wave radar sensor and each sensor or ECU.

DTC No.	Detection Item	DTC Detection Condition	Trouble Area
U010087	Lost Communication with ECM/PCM "A" Missing Message	When the ignition switch is ON for 3 seconds or more, an ECM communication malfunction continues for approximately 3 seconds or more.	CAN communication system
U010187	Lost Communication with TCM Missing Message	When the ignition switch is ON for 3 seconds or more, a ECM communication malfunction continues for approximately 8 seconds or more.	CAN communication system
U012687	Lost Communication with Steering Angle Sensor Module Missing Message	When the ignition switch is ON for 3 seconds or more, a steering sensor communication malfunction continues for approximately 1 second or more.	CAN communication system
U012987	Lost Communication with Brake System Control Module Missing Message	When the ignition switch is ON for 3 seconds or more, a communication error between the skid control ECU (brake actuator assembly) and the millimeter wave radar sensor assembly is detected for approximately 1 second or more.	CAN communication system
U015587	Lost Communication with Instrument Panel Cluster (IPC) Control Module Missing Message	When the ignition switch is ON for 3 seconds or more, a combination meter assembly communication malfunction continues for 8 seconds or more.	CAN communication system

PROCEDURE

CLEAR DTC

(a) Clear the DTCs.

Body Electrical > Pre-Collision System > Clear DTCs

2.	CHECK FOR DTCs

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

HINT:

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

(b) Check for DTCs.

Body Electrical > Pre-Collision System > Trouble Codes

Result	Proceed to
U010087, U010187, U012687, U012987 or U015587 is output	A
DTCs are not output	B
None of the above conditions are met	C

GO TO CAN COMMUNICATION SYSTEM

USE SIMULATION METHOD TO CHECK

GO TO DTC CHART

Stop Light Relay Actuator Stuck (C142571)

DESCRIPTION The stop light switch and skid control ECU (brake actuator assembly) output stop light signals. If the skid control ECU (brake actuator assembly) detects a malfunction in circuits related to the stop light, it informs the millimeter wave radar sensor assembly via CAN communication, and DTC C142571 is stored...

Lost Communication with Image Processing Module "A" Missing Message (U023A87)

DESCRIPTION The millimeter wave radar sensor assembly is connected to the forward recognition camera via the CAN communication line. If the millimeter wave radar sensor assembly receives signals indicating that its communication with the forward recognition camera is abnormal, the millimeter wave radar sensor assembly stores DTC U023A87...

Other information:

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