Last Modified: 05-13-2024 6.11:8.1.0 Doc ID: RM1000000024XSA
Model Year Start: 2023 Model: GR Corolla Prod Date Range: [09/2022 -           ]
Title: ACOUSTIC VEHICLE ALERTING SYSTEM: ACOUSTIC VEHICLE ALERTING SYSTEM: U012987,...,U029387; Lost Communication With Brake System Control Module Missing Message; 2023 - 2025 MY Corolla Corolla Hatchback Corolla HV GR Corolla [09/2022 -        ]

DTC

U012987

Lost Communication With Brake System Control Module Missing Message

DTC

U014087

Lost Communication with Body Control Module Missing Message

DTC

U029387

Lost Communication with Hybrid/EV Powertrain Control Module Missing Message

DESCRIPTION

These DTCs are stored when the CAN communication system is malfunctioning.

DTC No.

Detection Item

DTC Detection Condition

Trouble Area

U012987

Lost Communication With Brake System Control Module Missing Message

The vehicle approaching speaker controller 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)

U014087

Lost Communication with Body Control Module Missing Message

The vehicle approaching speaker controller does not receive data from the main body ECU (multiplex network body ECU) for approximately 10 seconds or more.
  • CAN communication system
  • Main body ECU (multiplex network body ECU)

U029387

Lost Communication with Hybrid/EV Powertrain Control Module Missing Message

The vehicle approaching speaker controller does not receive data from the hybrid vehicle control ECU for approximately 10 seconds or more.
  • CAN communication system
  • Hybrid vehicle control ECU

PROCEDURE

1.

CHECK FOR DTC

(a) Check for DTCs.

Body Electrical > Acoustic Vehicle Alerting System > Trouble Codes

HINT:

When DTCs indicating a CAN communication system malfunction are output, perform troubleshooting for the CAN communication system before the acoustic vehicle alerting system.

NEXT

GO TO CAN COMMUNICATION SYSTEM