| Detection condition |
- TCM detects a CAN bus communication line (AT-bus) error.
Precondition
- Battery voltage is the standard or more.
|
| Fail-safe |
|
| Possible cause |
- DTCs are stored in the following modules.
- Malfunction in wiring harness (including connector/terminal) between PCM and TCM (See CIRCUIT INSPECTION
.) (See CONNECTOR INSPECTION
.)
- Malfunction in wiring harness (including connector/terminal) between selector lever and TCM (See CIRCUIT INSPECTION
.) (See CONNECTOR INSPECTION
.)
- Malfunction in wiring harness (including connector/terminal) between backup power supply unit and TCM (See CIRCUIT INSPECTION
.) (See CONNECTOR INSPECTION
.)
- Malfunction in wiring harness (including connector/terminal) between drive motor control module and TCM (WITH M Hybrid BOOST) (See CIRCUIT INSPECTION
.) (See CONNECTOR INSPECTION
.)
- Malfunction in wiring harness (including connector/terminal) between Mazda M Hybrid Boost battery and TCM (WITH M Hybrid BOOST) (See CIRCUIT INSPECTION
.) (See CONNECTOR INSPECTION
.)
- 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 |
PCM |
| 3 |
Selector lever |
| 4 |
Backup power supply unit (Without Mazda M Hybrid boost) |
| 5 |
Drive motor control module (With Mazda M Hybrid boost) |
| 6 |
Mazda M Hybrid Boost battery (With Mazda M Hybrid boost) |