Toyota Yaris: Dynamic Radar Cruise Control System / Lost Communication with ECM/PCM "A" Missing Message (U010087,U012687,U012987,U015587)

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,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.

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 ECM and millimeter wave radar sensor assembly is detected for 1 second or more.

CAN communication system

Radar Cruise2

U012687

Lost Communication with Steering Angle Sensor Module Missing Message

When the dynamic radar cruise control system is operating, a communication error between the millimeter wave radar sensor assembly and steering sensor continues for 5 seconds or more.

CAN communication system

Radar Cruise2

U012987

Lost Communication with Brake System Control Module Missing Message

When the dynamic radar cruise control system is operating, a communication error between the millimeter wave radar sensor assembly and skid control ECU (brake actuator assembly) continues for 5 seconds or more.

CAN communication system

Radar Cruise2

U015587

Lost Communication with Instrument Panel Cluster (IPC) Control Module Missing Message

When the dynamic radar cruise control system is operating, a communication error between the millimeter wave radar sensor assembly and combination meter assembly continues for 12 seconds or more.

CAN communication system

Radar Cruise2

PROCEDURE

1.

CLEAR DTC

(a) Clear the DTCs.

Powertrain > Radar Cruise2 > 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 Cruise2 > Trouble Codes

Result

Proceed to

DTC U010087, U012687, U012987 or U015587 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

    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...

    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:

    Toyota Yaris XP210 (2020-2024) Reapir and Service Manual: Terminals Of Ecu


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    Toyota Yaris XP210 (2020-2024) Reapir and Service Manual: Security Indicator Light Does not Blink


    DESCRIPTION The certification ECU (smart key ECU assembly) blinks the security indicator light (combination meter assembly) when the immobiliser is set (engine switch off). The certification ECU (smart key ECU assembly) receives the security indicator light signal from the main body ECU (multiplex network body ECU) via CAN communication when the theft deterrent system is in the arming preparation state or alarm sounding state...

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    If a key is left in the vehicle, the functions of the key left in the vehicle are temporarily suspended to prevent theft of the vehicle.

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