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

Toyota Yaris XP210 (2020-2024) 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

1.

CLEAR DTC

(a) Clear the DTCs.

Powertrain > Radar Cruise1 > Clear DTCs
NEXT

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

A

GO TO CAN COMMUNICATION SYSTEM

B

USE SIMULATION METHOD TO CHECK

C

GO TO DTC CHART

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    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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