DTC B1B71-15: Evaporator Temperature Sensor Circuit Malfunction
B1B71:15 (DASH_ESU) DETECTION CONDITION AND POSSIBLE CAUSE
| System malfunction location |
Evaporator temperature sensor circuit malfunction |
| Detection condition |
- The dash-electrical supply unit detects an open circuit in evaporator temperature sensor circuit.
|
| Fail-safe |
- Fixes the evaporator temperature sensor input value at 0°C {32°F} and performs control.
|
| Possible cause |
- Malfunction in wiring harness (including connector/terminal) between evaporator temperature sensor and dash-electrical supply unit (See CIRCUIT INSPECTION
.) (See CONNECTOR INSPECTION
.)
- Evaporator temperature sensor malfunction (Refer to [EVAPORATOR TEMPERATURE SENSOR INSPECTION
]
).
- Dash-electrical supply unit malfunction (Refer to [DASH-ELECTRICAL SUPPLY UNIT REMOVAL/INSTALLATION
]
).
|
| Repeatability verification procedure |
- Clear the DTC recorded in the memory. (See CLEARING DTC
.)
|
 Courtesy of MAZDA MOTORS CORP.
|
| 1 |
Dash-electrical supply unit |
| 2 |
Evaporator temperature sensor |