DTC P1602: Notes
DTC P1602 [AJ] DETECTION CONDITION AND POSSIBLE CAUSES
| DTC P1602 |
Immobilizer unit-PCM communication error |
| DETECTION CONDITION |
- Command transmission from the PCM to the immobilizer control module exceeds limit.
- No response from immobilizer control module.
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| POSSIBLE CAUSE |
- Immobilizer unit malfunction
- Coil (immobilizer system) malfunction
- Key (transponder) malfunction
- PCM malfunction
- Open circuit in wiring between immobilizer control module terminal A and PCM terminal 64
- Open circuit in wiring between immobilizer control module terminal C and body ground
- Open circuit in wiring between immobilizer control module terminal F and coil terminal A
- Open circuit in wiring between immobilizer control module terminal D and coil terminal C
- Short to ground circuit in wiring between immobilizer control module terminal A and PCM terminal 64
- Short to ground circuit in wiring between immobilizer control module terminal F and coil terminal A
- Short to ground circuit in wiring between immobilizer control module terminal D and coil terminal C
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 Courtesy of MAZDA MOTORS CORP.
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