DIAGNOSIS FUNCTION
| Condition | Detection Condition | Response when malfunction detected | Recovery Conditions |
|---|---|---|---|
| ECU malfunction | Internal malfunction detected in the steering vibration and heater ECU | ECU reset | Malfunctions cleared during reset |
| Thermistor malfunction | When an open circuit or short occurs in the thermistor inside the steering wheel assembly for 2 seconds or more | Heater output off | Normal condition of the thermistor is restored |
| Heater OFF request signal received | |||
| Heater malfunction | Overcurrent protection or overheating protection operates | Heater output off | Heater OFF request signal received |
| Lost communication | Lost communication with air conditioning amplifier assembly continuously for 15 seconds | Heater output off | Normal communication continues for 10 seconds |
FAIL-SAFE FUNCTION
| Content | Operation | |
|---|---|---|
| ECU malfunction | Internal malfunction detected in the steering vibration and heater ECU | ECU reset |
| Heater malfunction | Drive element overcurrent detection | Heater output off |
| Drive element overheat detection | Heater output off | |
| Power source malfunction | Low-voltage detection | Heater output off |
| Overvoltage detection | Heater output off | |