DTC P1D7A

WARNING: This page is about a different variant/trim than selected.

DTC P1D7A: Reactor Temperature Sensor Circuit Range/Performance Problem

General Description

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

The power control unit (PCU) monitors the reactor temperature sensor value to prevent malfunction of the reactor due to heat generation. If the reactor temperature sensor detection value is a specified value for a specified time, the motor control module in the PCU detects a malfunction and stores a DTC.

Monitor Execution, Sequence, Duration, DTC Type

Execution	Immediately after the vehicle is turned to ON mode
Sequence	None
Duration	100 milliseconds or more
DTC Type	One drive cycle, MIL on, POWER SYSTEM indicator on

Enable Conditions

Condition	Minimum	Maximum
Elapsed time after the vehicle condition is turned to the OFF (LOCK) mode	6 hours	-
Traction motor speed	-	20 rpm
Generator motor speed [Motor Speed (GEN)]	-	20 rpm
12 volt battery voltage	8 V	-

[ ]: HDS Parameter

Malfunction Threshold

The difference between the reactor temperature detection value and the IGBT temperature detection value is more than 72 deg.F (40 deg.C) and continues for 100 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.

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.