Toyota Yaris: Lighting System / Lost Communication with ECM/PCM "A" Missing Message (U010087,U012087,U012687,U012987,U015187,U015587,U016487,U016887)

Toyota Yaris XP210 (2020-2022) Reapir and Service Manual / Vehicle Exterior / Lighting (ext) / Lighting System / Lost Communication with ECM/PCM "A" Missing Message (U010087,U012087,U012687,U012987,U015187,U015587,U016487,U016887)

DESCRIPTION

These DTCs are stored if a CAN communication malfunction occurs between the main body ECU (multiplex network body ECU) and other ECUs.

DTC No.

Detection Item

DTC Detection Condition

Trouble Area

U010087

Lost Communication with ECM/PCM "A" Missing Message

The main body ECU (multiplex network body ECU) does not receive data from the ECM for approximately 10 seconds or more.

  • CAN communication system
  • ECM

U012087

Lost Communication with Starter / Generator Control Module Missing Message

The main body ECU (multiplex network body ECU) does not receive data from the certification ECU (smart key ECU assembly) for approximately 10 seconds or more.

  • CAN communication system
  • Certification ECU (smart key ECU assembly)

U012687

Lost Communication with Steering Angle Sensor Module Missing Message

The main body ECU (multiplex network body ECU) does not receive data from the steering sensor for approximately 10 seconds or more.

  • CAN communication system
  • Steering sensor

U012987

Lost Communication with Brake System Control Module "A" Missing Message

The main body ECU (multiplex network body ECU) does not receive data from the skid control ECU (brake actuator assembly) for approximately 10 seconds or more.

  • CAN communication system
  • Skid control ECU (brake actuator assembly)

U015187

Lost Communication with Restraints Control Module Missing Message

The main body ECU (multiplex network body ECU) does not receive data from the airbag sensor assembly for approximately 10 seconds or more.

  • CAN communication system
  • Airbag sensor assembly

U015587

Lost Communication with Instrument Panel Cluster (IPC) Control Module

The main body ECU (multiplex network body ECU) does not receive data from the combination meter assembly for approximately 10 seconds or more.

  • CAN communication system
  • Combination meter assembly

U016487

Lost Communication with HVAC Control Module Missing Message

The main body ECU (multiplex network body ECU) does not receive data from the air conditioning amplifier assembly for approximately 10 seconds or more.

  • CAN communication system
  • Air conditioning amplifier assembly

U016887

Lost Communication with Vehicle Security Control Module Missing Message

The main body ECU (multiplex network body ECU) does not receive data from the certification ECU (smart key ECU assembly) for approximately 10 seconds or more.

  • CAN communication system
  • Certification ECU (smart key ECU assembly)

PROCEDURE

1.

CLEAR DTC

(a) Clear the DTCs.

Body Electrical > Main Body > Clear DTCs
NEXT

2.

CHECK FOR DTC

(a) Turn the ignition switch to ON.

(b) Wait 20 seconds or more.

(c) Turn the GTS on.

(d) Enter the following menus: Body Electrical / Main Body / Trouble Codes.

(e) Check for DTCs.

Body Electrical > Main Body > Trouble Codes

Result

Proceed to

DTC are not output

A

U010087, U012087, U012687, U012987, U015187, U015587, U016487 or U016887 are output

B

None of the above conditions are met

C

A

USE SIMULATION METHOD TO CHECK

B

GO TO CAN COMMUNICATION SYSTEM

C

GO TO DIAGNOSTIC TROUBLE CODE CHART

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    Categories

    Break-In Period

    No special break-in is necessary, but a few precautions in the first 600 miles (1,000 km) may add to the performance, economy, and life of the vehicle.

    Do not race the engine. Do not maintain one constant speed, either slow or fast, for a long period of time. Do not drive constantly at full-throttle or high engine rpm for extended periods of time. Avoid unnecessary hard stops. Avoid full-throttle starts.

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