Toyota Corolla Cross: Lost Communication With Brake System Control Module Missing Message (U012987,U014087,U029387)
DESCRIPTION
These DTCs are stored when the CAN communication system is malfunctioning.
|
DTC No. | Detection Item |
DTC Detection Condition | Trouble Area |
DTC Output from | Priority |
|---|---|---|---|---|---|
|
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. |
| Acoustic Vehicle Alerting System |
A |
| 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. |
| Acoustic Vehicle Alerting System |
A |
| 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. |
| Acoustic Vehicle Alerting System |
A |
PROCEDURE
| 1. |
CHECK FOR DTC |
(a) Check for DTCs.
Body Electrical > Acoustic Vehicle Alerting System > Trouble CodesHINT:
When DTCs indicating a CAN communication system malfunction are output, perform troubleshooting for the CAN communication system before the acoustic vehicle alerting system.
| NEXT | .gif) | GO TO CAN COMMUNICATION SYSTEM |
READ NEXT:
Software Incompatibility with Body Control Module Invalid/Incompatible Software Component (U032257)
DESCRIPTION The vehicle approaching speaker controller receives vehicle information from the main body ECU (multiplex network body ECU) via CAN communication.
This DTC is stored when the vehicle info
There is No Sound Made
DESCRIPTION Based on signals received from each ECU, the vehicle approaching speaker controller outputs warning sounds through the vehicle approaching speaker assembly. WIRING DIAGRAM
CAUTION / NOTI
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Problem Symptoms Table
PROBLEM SYMPTOMS TABLE NOTICE: When replacing the combination meter assembly, always replace it with a new one. If a combination meter assembly which was installed to another vehicle is used, the information stored in it will not match the information from the vehicle and a DTC may be stored.
HINT
Backup Boost Converter Circuit
DESCRIPTION A backup boost converter is built into the engine stop and start ECU. The backup boost converter helps maintain the power source voltage when the engine is restarted by stop and start control.
This prevents various functions such as the audio and visual system from malfunctioning if th
