HYBRID CONTROL SYSTEM, Diagnostic DTC:P0A94-589, P0A94-590

DTC Code DTC Name
P0A94-589 Boosting Converter Performance
P0A94-590 Boosting Converter Performance

DESCRIPTION

The MG ECU, which is built into the inverter with converter assembly, detects pre-boosting high voltage (VL) using the voltage sensor in the boost converter to control boosting. The MG ECU also monitors the boost converter voltage sensor signal line and detects malfunctions.

DTC No. Detection Item DTC Detection Condition Trouble Area Warning Indicate
P0A94-589 Boosting Converter Performance

Boost converter voltage (VL) signal is stuck (Low)

(1 trip detection logic)

 Inverter with converter assembly

Master Warning Light:

Comes on
P0A94-590 Boosting Converter Performance

Boost converter voltage (VL) signal is stuck (High)

(1 trip detection logic)

 Inverter with converter assembly

Master Warning Light:

Comes on
Related Data List
DTC No. Data List
P0A94-589 VL-Voltage before Boosting
P0A94-590

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.


  1. Turn the power switch on (IG) and wait for 5 seconds or more.

PROCEDURE


  1. REPLACE INVERTER WITH CONVERTER ASSEMBLY

    Click here

    Tech Tips

    The boost converter voltage (VL) sensor is connected to the MG ECU inside the inverter with converter assembly. If P0A94-589 or P0A94-590 is output, replace the inverter with converter assembly.

    Result
    Proceed to
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    COMPLETED