DTC P0AFA (492) (Battery Condition Monitor Module A)

DTC P0AFA (492): HV Battery System A Voltage Low

General Description

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

The battery condition monitor module A drives the IGB relay and monitors the output voltage. If the IGB voltage decreases even though there is a certain voltage to the IG1MONI, the battery condition monitor module A detects a malfunction and stores a DTC.

Monitor Execution, Sequence, Duration, DTC Type

Execution	Continuous
Sequence	None
Duration	500 milliseconds or more
DTC Type	One drive cycle, MIL on, POWER SYSTEM indicator on, 12 volt battery charging system indicator off

Enable Conditions

Condition
Vehicle	ON mode

Malfunction Threshold

The IGB voltage is 1.0 V or less for at least 500 milliseconds when the IG1MONI voltage is 9.2 V 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.

IGB relay IGHLDB/IG HOLD2 RLY CL- line open
IGB relay IGB line open (include fuse blown)
IGB relay failure
Battery condition monitor module A internal circuit failure

Diagnosis Details

Conditions for setting the DTC

When a malfunction is detected, the MIL and the POWER SYSTEM indicator comes on and a Pending DTC, a Confirmed DTC, and the freeze data are stored in the battery condition monitor module A memory.

Conditions for clearing the DTC

The MIL and the POWER SYSTEM indicator are cleared if the malfunction does not return in three consecutive trips in which the diagnostic runs. The MIL and the POWER SYSTEM indicator, the Pending DTC, the Confirmed DTC, and the freeze data can be cleared with the scan tool Clear command or by disconnecting the 12 volt battery.