HYBRID CONTROL SYSTEM, Diagnostic DTC:P0C3A-621, P0C3B-622, P0C3F-623, P0C40-624
| DTC Code | DTC Name |
|---|---|
| P0C3A-621 | Boosting Converter Temperature Sensor "A" Low |
| P0C3B-622 | Boosting Converter Temperature Sensor "A" High |
| P0C3F-623 | Boosting Converter Temperature Sensor "B" Low |
| P0C40-624 | Boosting Converter Temperature Sensor "B" High |
DESCRIPTION
The MG ECU, which is built into in the inverter with converter assembly, detects the boost converter temperature using the temperature sensor in the boost converter. The boost converter temperature sensor outputs voltage that changes between 0.5 and 4.5 V according to changes in temperature. The higher the boost converter temperature is, the lower the output voltage will be. Conversely, the lower the boost converter temperature is, the higher the output voltage will be. The MG ECU controls load based on signals sent from the boost converter temperature sensor to prevent overheating. The MG ECU detects malfunctions in the boost converter temperature sensor and its wiring.
| DTC No. | Detection Item | DTC Detection Condition | Trouble Area | Warning Indicate |
|---|---|---|---|---|
| P0C3A-621 | Boosting Converter Temperature Sensor "A" Low | Open or short to ground in the boost converter temperature sensor (upper) signal circuit (1 trip detection logic) |
Inverter with converter assembly | Master Warning Light: Comes on |
| P0C3B-622 | Boosting Converter Temperature Sensor "A" High | Short to +B in the boost converter temperature sensor (upper) signal circuit (1 trip detection logic) |
Inverter with converter assembly | Master Warning Light: Comes on |
| P0C3F-623 | Boosting Converter Temperature Sensor "B" Low | Open or short to ground in the boost converter temperature sensor (lower) signal circuit (1 trip detection logic) |
Inverter with converter assembly | Master Warning Light: Comes on |
| P0C40-624 | Boosting Converter Temperature Sensor "B" High | Short to +B in the boost converter temperature sensor (lower) signal circuit (1 trip detection logic) |
Inverter with converter assembly | Master Warning Light: Comes on |
| DTC No. | Data List |
|---|---|
| P0C3A-621 | Boosting Converter Temperature (Upper) |
| P0C3B-622 | |
| P0C3F-623 | Boosting Converter Temperature (Lower) |
| P0C40-624 |
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.
