Fail-Safe Table
When any of the following malfunctions (DTCs) is detected, fail-safe mode is activated.
However, when HVAC control module detects normal operation of A/C system, fail-safe mode is canceled.
DTC FAIL-SAFE TABLE CHART
| DTC No. | Trouble Area | Fail-Safe Operation | |
|---|---|---|---|
| Detection of malfunction when ignition switch is turned ON | Detection of malfunction during ignition switch is ON | ||
| B1501 | Outside air temperature sensor and/or its circuit | 20°C (68 °F) | HVAC control module keeps condition just before detection. |
| B1502 | Inside air temperature sensor and/or its circuit | 25 °C (77°F) | |
| B1503 | A/C evaporator outlet temperature sensor | 0 °C (32 °F) | |
| B1504 | Sunload sensor and/or its circuit | 175 W/m2 | |
| B1510 | Water temperature sensor and/or its circuit | 80°C(176°F) | |
| B1511 | Temperature control actuator (position sensor) and/or its circuit | The operation of actuator stops. | |
| B1512 | Air flow control actuator (position sensor) and/or its circuit | ||
| B1513 | Temperature control actuator and/or its circuit | ||
| B1514 | Air flow control actuator and/or its circuit | ||
| B1520 | Temperature selector and/or its circuit | 23 °C (73 °F) | |
| B1521 | Blower speed selector and/or its circuit | 1st | |
| B1522 | Air flow selector and/or its circuit | DEF | |
NOTE:
In case that all of temperature selector, blower speed selector, and air flow selector are abnormal, the operation of air conditioning system stops.