DTC P1D84 (484) : Intelligent Power Module Malfunction OR Signal Line Hi (2017)

General Description

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

The motor control module detects OR signals from all abnormality detection signals coming from motor power inverter (MPI) module. If FOALL signal without the OR signal of MPI module is high, and other abnormality detection signal is low and continues to be so for a set time, the motor control module detects a malfunction and stores a DTC.

Monitor Execution, Sequence, Duration, DTC Type, OBD Status

Execution	Continuous
Sequence	None
Duration	350 milliseconds or more
DTC Type	One drive cycle, MIL off, POWER SYSTEM indicator on
OBD Status	PASSED/FAILED/NOT COMPLETED (STILL TESTING)

Enable Conditions

Condition	Minimum	Maximum
12 volt battery voltage	9.0 - 9.2 V*	-

*: Hysteresis voltage width

Malfunction Threshold

If FOALL signal without the OR of the abnormality signal from MPI module is high, and other abnormality signal is low and continues to be so for 350 milliseconds or more.

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.

Abnormal detection line failure
MPI module failure
Motor control module failure

Diagnosis Details

Conditions for setting the DTC

When a malfunction is detected, the POWER SYSTEM indicator 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 Pending DTC, the Confirmed DTC, the POWER SYSTEM indicator and the freeze data can be cleared with the scan tool Clear command or by disconnecting the 12 volt battery.