DTC P06B4 (Generator Motor Control Module)

DTC P06B4:  Generator Motor Phase Current Sensor Power Supply Circuit Low (Phase V)

General Description 

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

The power control unit (PCU) controls the motor output based on the generator phase V current sensor signals. When the power supply voltage is out of a specified range for a set time, 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	200 milliseconds or more
DTC Type	Two drive cycles, MIL on, POWER SYSTEM indicator on

Enable Conditions 

Condition	Minimum	Maximum
12 volt battery voltage	8 V	-

Malfunction Threshold 

The generator phase V current sensor power supply voltage is 4.65 V or less or 5.35 V or more for at least 200 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 during the first drive cycle, a Pending DTC is stored in the motor control module memory. If the malfunction returns in the next (second) drive cycle, the MIL comes on and a Confirmed DTC and the freeze data are stored.

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.