Toyota Yaris: Dynamic Radar Cruise Control System / Lost Communication with ECM/PCM "A" Missing Message (U010087,U010487,U012287)

Toyota Yaris XP210 (2020-2023) Reapir and Service Manual / Engine & Hybrid System / Cruise Control / Dynamic Radar Cruise Control System / Lost Communication with ECM/PCM "A" Missing Message (U010087,U010487,U012287)

DESCRIPTION

The ECM communicates with each sensor and ECU via CAN communication.

If any malfunction is detected in a CAN communication circuit, one or more CAN communication system DTCs are stored.

DTC No.	Detection Item	DTC Detection Condition	Trouble Area	DTC Output from
U010087	Lost Communication with ECM/PCM "A" Missing Message	When the dynamic radar cruise control system is operating, a communication malfunction between the skid control ECU (brake actuator assembly) and ECM is detected for approximately 1 second or more.	CAN communication system	Radar Cruise1
U010487	Lost Communication with Cruise Control Module Missing Message	When the ignition switch is ON and the dynamic radar cruise control system is operating, a communication malfunction between the millimeter wave radar sensor assembly and ECM is detected for approximately 1 second or more.	CAN communication system	Radar Cruise1
U012287	Lost Communication with Vehicle Dynamics Control Module Missing Message	When the ignition switch is ON and the dynamic radar cruise control system is operating, a communication malfunction between the skid control ECU (brake actuator assembly) and ECM is detected for approximately 2.6 seconds or more.	CAN communication system	Radar Cruise1

PROCEDURE

CLEAR DTC

(a) Clear the DTCs.

Powertrain > Radar Cruise1 > 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.

Powertrain > Radar Cruise1 > Trouble Codes

Result	Proceed to
DTC U010087, U010487 or U012287 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

Communication Error from ECM to VSC Invalid Serial Data Received (P163181)

DESCRIPTION The skid control ECU (brake actuator assembly) sends signals such as brake request signals to the ECM. When the ECM detects logic error signals sent from the skid control ECU (brake actuator assembly) for a certain period of time, DTC P163181 is stored...

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

DESCRIPTION The millimeter wave radar sensor assembly communicates with each sensor and ECU via CAN communication. If any malfunction is detected in a CAN communication circuit, one or more CAN communication system DTCs are stored...

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