Toyota Yaris: Active Noise Control System / Lost Communication With ECM/PCM "A" Missing Message (U010087,U012987,U014087)

Toyota Yaris XP210 (2020-2024) Reapir and Service Manual / Audio & Visual & Telematics / Audio / Video / Active Noise Control System / Lost Communication With ECM/PCM "A" Missing Message (U010087,U012987,U014087)

DESCRIPTION

These DTCs are stored when a malfunction occurs in the CAN communication circuit.

DTC No.

Detection Item

DTC Detection Condition

Trouble Area

U010087

Lost Communication With ECM/PCM "A" Missing Message

When the stereo component equalizer assembly detects a CAN communication malfunction in the engine system for 1 second or more continuously 3 seconds after the ignition switch is turned to ON*

CAN communication system

U012987

Lost Communication With Brake System Control Module Missing Message

When the stereo component equalizer assembly detects a CAN communication malfunction in the brake system for 1 second or more continuously 3 seconds after the ignition switch is turned to ON*

CAN communication system

U014087

Lost Communication with Body Control Module Missing Message

When the stereo component equalizer assembly detects a CAN communication malfunction in the main body ECU for 3 seconds or more continuously 3 seconds after the ignition switch is turned to ON*

CAN communication system

HINT:

*: Malfunction monitoring is not performed under the following conditions, in order to prevent erroneous detection.

  • After ignition switch is turned to ACC for 3 seconds or more.
  • After the auxiliary battery voltage returns to normal for 3 seconds.
  • Before 3 seconds have elapsed after auxiliary battery voltage has returned to normal.

PROCEDURE

1.

CLEAR DTC

(a) Clear the DTCs.

Body Electrical > Active Noise Control > Clear DTCs
NEXT

2.

CHECK FOR DTC

(a) Check for DTCs.

Body Electrical > Active Noise Control > Trouble Codes

Result

Proceed to

DTC U010087, U012987 and U014087 are not output

A

DTC U010087, U012987 and U014087 are output

B

HINT:

  • If CAN communication system malfunction DTCs are output, they may also be output for other systems.
  • If the CAN communication system has been checked and repaired in other systems, the DTC will not be output after rechecking for DTCs.
  • If the DTC is output frequently, duplicate the conditions that cause a malfunction and perform the check again, even though the DTC was not output after rechecking for DTCs.

    Click here

A

USE SIMULATION METHOD TO CHECK

B

GO TO CAN COMMUNICATION SYSTEM

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