| Detection condition |
- The TCM cannot receive CAN signal from backup power supply unit.
Precondition
- Battery voltage is the standard or more.
|
| Fail-safe |
|
| Possible cause |
- Malfunction in wiring harness (including connector/terminal) between backup power supply unit and TCM (See CIRCUIT INSPECTION
.) (See CONNECTOR INSPECTION
.)
- Backup power supply unit malfunction (Refer to [BACKUP POWER SUPPLY UNIT REMOVAL/INSTALLATION
] in service information).
- Control valve body malfunction (TCM malfunction) (Refer to [CONTROL VALVE BODY REMOVAL/INSTALLATION
] in service information).
|
| Repeatability verification procedure |
- Clear the DTC recorded in the memory. (See CLEARING DTC
.)
- Perform the following procedure to ensure that the DTC has been resolved:
- Switch the ignition ON (engine off or on).
|
 Courtesy of MAZDA MOTORS CORP.
|
| 1 |
TCM |
| 2 |
Backup power supply unit |