DTC P0AF2

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

DTC P0AF2: Traction Motor Inverter Temperature Sensor 2 Circuit

General Description

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

The power control unit (PCU) monitors the IGBT chip and board temperature sensor values to prevent malfunctions of the chip and other parts due to heat generation. The motor control module in the PCU compares the output temperature difference between the IGBT chip temperature sensor and the board temperature sensor at system activation timing, and if the difference exceeds a malfunction threshold for a specified time, the motor control module detects a malfunction and stores a DTC.

Monitor Execution, Sequence, Duration, DTC Type

Execution	Continuous
Sequence	None
Duration	100 milliseconds or more
DTC Type	Two drive cycles, MIL on, POWER SYSTEM indicator on

Enable Conditions

Condition	Minimum	Maximum
Elapsed time after the vehicle 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	-
High voltage side power supply voltage (6 V)	5 V	-

[ ]: HDS Parameter

Malfunction Threshold

The output temperature difference between the IGBT chip temperature sensor and the board temperature sensor at system activation timing is more than 84 deg.F (47 deg.C) or less than -83 deg.F (-46 deg.C) for at least 100 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.