HYBRID CONTROL SYSTEM, Diagnostic DTC:P1D72-450, P1D73-450
| DTC Code | DTC Name |
|---|---|
| P1D72-450 | FC Air Compressor Motor Inverter Temperature Sensor "A" Circuit Low |
| P1D73-450 | FC Air Compressor Motor Inverter Temperature Sensor "A" Circuit High |
DESCRIPTION
The MG ECU, which is built into in the inverter with converter assembly, detects the temperature of the FC air compressor motor inverter using the temperature sensor built into the inverter with converter assembly. The inverter cooling system operates independently of the engine cooling system. The MG ECU uses signals from the FC air compressor motor inverter temperature sensor to check the effectiveness of the inverter cooling system. If necessary, the MG ECU will limit inverter output to help prevent inverter overheating. The ECU also detects malfunctions in the FC air compressor motor inverter temperature sensor and its wiring.
| DTC No. | Detection Item | DTC Detection Condition | Trouble Area | Warning Indicate |
|---|---|---|---|---|
| P1D72-450 | FC Air Compressor Motor Inverter Temperature Sensor "A" Circuit Low | Short to ground in the FC air compressor motor inverter temperature sensor signal circuit (1 trip detection logic) |
Inverter with converter assembly | Master Warning Light: Comes on |
| P1D73-450 | FC Air Compressor Motor Inverter Temperature Sensor "A" Circuit High | Open or short to +B in the FC air compressor motor inverter temperature sensor signal circuit (1 trip detection logic) |
Inverter with converter assembly | Master Warning Light: Comes on |
| DTC No. | Data List |
|---|---|
| P1D72-450 | FC Air Compressor Inverter Temperature |
| P1D73-450 |
CAUTION / NOTICE / HINT
Note
When the vehicle is parked with the power switch off, if the FC control ECU judges that the FC stack temperature will go below 0°C (32°F), it activates the FC air compressor, hydrogen pump and FC cooling water pump for a maximum of 180 seconds and drains water from the FC stack assembly. When performing inspection or repairs with the power switch off (not on (IG) or on (READY)), disconnect the cable from the negative (-) auxiliary battery terminal before performing work (If the auxiliary battery voltage is needed to conduct inspection, warm up the FC system beforehand).
Tech Tips
After the repair, clear the DTCs and perform the following procedure to check that DTCs are not output.
-
Turn the power switch on (IG) and wait for 5 seconds or more.
