DTC P1D7F

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DTC P1D7F: Generator Motor Inverter Malfunction Signal Low (Generator Motor Control Module Detected)

General Description

Courtesy of HONDA, U.S.A., INC.

Symptom 1

When an overcurrent (short circuit current) passes through the IGBT at the generator motor side, the power control unit (PCU) detects a trouble (SC) with the GDIC function and, at the same time when outputting a failure information (SC) to the motor control module, blocks a gate signal. If it is detected for the specified time that the SC signal is unmatched with the CAN information (GEN FO) from the power drive unit (PDU) (SC side: Abnormal, GEN FO side: Normal), the motor control module in the PCU detects a malfunction and stores a DTC.

Symptom 2

When a trouble with the power supply which drives the IGBT at the generator motor side occurs, the PCU detects a trouble (F15V) with the GDIC function and, at the same time when outputting a failure information (F15V) to the motor control module, blocks a gate signal. If it is detected for the specified time that the F15V signal is unmatched with the CAN information (GEN FO) from the PDU (F15V side: Abnormal, GEN FO side: Normal), the motor control module in the PCU detects a malfunction and stores a DTC.

Monitor Execution, Sequence, Duration, DTC Type

Execution	Continuous
Sequence	None
Duration	90 milliseconds or more
DTC Type	One drive cycle, MIL on, POWER SYSTEM indicator on

Enable Conditions

Condition	Minimum	Maximum
12 volt battery voltage	8 V	-

Malfunction Threshold

One of these symptoms occurs:

Symptom 1

If a wiring trouble inside the SC (where an SC signal is detected and the CAN information from the PDU (GEN FO) is normal) continues for at least 90 milliseconds.

Symptom 2

If a wiring trouble inside the F15V (where an F15V signal is detected and the CAN information from the PDU (GEN FO) is normal) continues for at least 90 milliseconds.

Possible Cause

NOTE: The causes shown may not be a complete list of all potential problems, and it is possible that there may be other causes.

PCU internal failure

Diagnosis Details

Conditions for setting the DTC

When a malfunction is detected, the MIL comes on and a Pending DTC, a Confirmed DTC, and the freeze data are stored in the motor control module memory.

Conditions for clearing the DTC

The MIL is cleared if the malfunction does not return in three consecutive trips in which the diagnostic runs. The MIL, the Pending DTC, the Confirmed DTC, and the freeze data can be cleared with the scan tool Clear command.