HYBRID CONTROL SYSTEM, Diagnostic DTC:P1D7B-450, P1D7E-450

DTC Code DTC Name
P1D7B-450 FC Air Compressor Motor "A" Temperature Sensor Circuit Correlation
P1D7E-450 FC Air Compressor Motor "A" Temperature Sensor Circuit Intermittent

DESCRIPTION

The resistance of the thermistor built into the FC air compressor motor temperature sensor changes in accordance with changes in FC air compressor motor temperature. The lower the FC air compressor motor temperature, the higher the thermistor resistance. Conversely, the higher the FC air compressor motor temperature, the lower the resistance.

A01MGOSE17
*1 Resistance (kΩ)
*2 Temperature (°C (°F))
DTC No. Detection Item DTC Detection Condition Trouble Area Warning Indicate
P1D7B-450 FC Air Compressor Motor "A" Temperature Sensor Circuit Correlation

FC air compressor motor temperature sensor output does not increase in which the value should increase, or output does not decrease under conditions in which the value should decrease.

(1 trip detection logic)

 FC air compressor with motor assembly (FC air compressor motor temperature sensor)

Master Warning Light:

Comes on
P1D7E-450 FC Air Compressor Motor "A" Temperature Sensor Circuit Intermittent

Sudden change in FC air compressor motor temperature sensor output or hunting:

Unusual sudden change in FC air compressor motor temperature sensor output occurs and offset condition continues for a certain period of time, or unusual change in motor temperature sensor output occurs repeatedly.

(1 trip detection logic)

 FC air compressor with motor assembly (FC air compressor motor temperature sensor)

Master Warning Light:

Comes on
Related Data List
DTC No. Data List
P1D7B-450 FC Air Compressor Motor Temperature
P1D7E-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


  • If DTC P1D7B-450 is output, clear the DTCs, perform the following procedure, and check that the same DTC is not output after the repair.


    1. Drive the vehicle (stop and go driving) on urban roads for approximately 5 minutes. If the Data List item "FC Air Compressor Motor Temperature" shows both increases and decreases in temperature, suspected areas indicated by this DTC are not malfunctioning.

  • If DTC P1D7E-450 is output, clear the DTCs, perform the following procedure, and check that the same DTC is not output after the repair.


    1. Turn the power switch on (READY) and wait for 30 seconds or more.

    2. Drive the vehicle for approximately 5 minutes according to the freeze frame data items "Vehicle Speed", "Inverter Coolant Water Temperature", "Drive Motor Temperature" and "FC Air Compressor Motor Temperature".

PROCEDURE


  1. REPLACE FC AIR COMPRESSOR WITH MOTOR ASSEMBLY

    Click here

    Tech Tips

    The FC air compressor motor temperature sensor is not available as a supply part. If it requires replacement, replace the FC air compressor with motor assembly.

    Result
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