DTC P18A3-00: Coupling Component Temperature Sensor: High Input
P18A3: 00 (PCM (H3T)) DETECTION CONDITION AND POSSIBLE CAUSE
| System malfunction location |
Coupling component temperature sensor: High input |
| Detection condition |
- The PCM detects an open circuit or short to power supply in the coupling component temperature sensor signal circuit.
|
| Fail-safe |
|
| Possible cause |
- Coupling component temperature sensor malfunction (Refer to [
COUPLING COMPONENT TEMPERATURE SENSOR INSPECTION]
in service information).
- Malfunction in wiring harness (including connector/terminal) between coupling component temperature sensor (electronic control coupling) and electrical supply unit (ESU) (See CIRCUIT INSPECTION
.) (See CONNECTOR INSPECTION
.)
- Electrical supply unit (ESU) malfunction (Refer to [ELECTRICAL SUPPLY UNIT (ESU) REMOVAL/INSTALLATION
] in service information).
- PCM malfunction (Refer to [PCM REMOVAL/INSTALLATION
] in service information).
|
| Repeatability verification procedure |
1. Clear the DTC recorded in the memory. (See CLEARING DTC
.) |
 Courtesy of MAZDA MOTORS CORP.
|
| 1 |
Electrical supply unit (ESU) |
| 2 |
Coupling component temperature sensor (electronic control coupling) |