Last Modified: 12-11-2024 6.11:8.1.0 Doc ID: RM100000002PY8M
Model Year Start: 2025 Model: GR Corolla Prod Date Range: [09/2024 -           ]
Title: G16E-GTS (ENGINE CONTROL): SFI SYSTEM: U115C87; Lost Communication with ECM/PCM "A" (ch5) Missing Message; 2025 MY GR Corolla [09/2024 -        ]

DTC

U115C87

Lost Communication with ECM/PCM "A" (ch5) Missing Message

DESCRIPTION

The ECM and skid control ECU (brake actuator assembly) transmit and receive date via CAN communication.

Detection overview

If a communication error occurs between the ECM and skid control ECU (brake actuator assembly), the ECM stores this DTC.

DTC No.

Detection Item

DTC Detection Condition

Trouble Area

MIL

DTC Output from

Priority

Note

U115C87

Lost Communication with ECM/PCM "A" (ch5) Missing Message

Diagnostic condition:

  • IG ON

Abnormal condition:

  • There is no communication between the ECM and skid control ECU (brake actuator assembly).

Abnormal period:

  • -

Number of trips:

  • 1 trip

Detection method:

  • Constant monitor

Sensors/component parts used for detection:

  • ECM
  • Wire harness or connector
  • Skid control ECU (brake actuator assembly)
  • ECM

Does not come on

Engine

B

SAE Code: U115C

CONFIRMATION DRIVING PATTERN

By performing a confirmation drive, you can confirm the reoccurrence of DTC.

  1. Clear the DTCs (even if no DTCs are stored, perform the clear DTC procedure).
  2. Turn the ignition switch off and wait for at least 30 seconds.
  3. Turn the ignition switch to ON and wait for 5 seconds or more.
  4. Enter the following menus: Powertrain / Engine / Trouble Codes.

    HINT:

    • If a pending DTC is output, the system is malfunctioning.
    • If a pending DTC is not output, perform the following procedure.
  5. Enter the following menus: Powertrain / Engine / Utility / All Readiness.
  6. Input the DTC: U115C87.
  7. Check the DTC judgment result.

    HINT:

    • If the judgment result shows NORMAL, the system is normal.
    • If the judgment result shows ABNORMAL, the system is malfunctioning.

PROCEDURE

1.

GO TO CAN COMMUNICATION SYSTEM

Click here 2025 MY Corolla Corolla Hatchback GR Corolla [09/2024 -        ]; NETWORKING: CAN COMMUNICATION SYSTEM (for Gasoline Model): HOW TO PROCEED WITH TROUBLESHOOTING

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END