DTC U0401-00: Correct Data Cannot Be Received From PCM: Notes
DTC U0401:00 (DSC HU/CM) DETECTION CONDITION AND POSSIBLE CAUSE
| DTC |
U0401:00 |
Abnormal message from PCM |
| DETECTION CONDITION |
- Correct data cannot be received from PCM
|
| FAIL-SAFE FUNCTION |
Refer to "DTC Table" and "Fail-safe Function Malfunction Contents". (See DTC TABLE [DSC HU/CM] ). |
| POSSIBLE CAUSE |
- DTCs are stored in the PCM
- DTCs are stored in the TCM
- Short to ground or open circuit in backup voltage circuit: VIN Y
- Short to ground in wiring harness between MAIN 200 A fuse and PCM terminal 2O
- MAIN 200 A fuse and/or ENG.+B 7.5 A fuse malfunction
- Open circuit in wiring harness between battery positive terminal and PCM terminal 2O VIN M
- Short to ground in wiring harness between MAIN 200 A fuse and PCM terminal 2A
- MAIN 200 A fuse and/or ENG.+B 7.5 A fuse malfunction
- Open circuit in wiring harness between battery positive terminal and PCM terminal 2A
- PCM malfunction
- TCM malfunction
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 Courtesy of MAZDA MOTORS CORP.
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