DTC Advanced Diagnostics: P16E4 (3.0L Engine)

DTC P16E4: ACG High-temperature

General Description

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

The powertrain control module (PCM) monitors the temperature of the alternator. If the alternator temperature is a specified value, the PCM detects a malfunction and stores a DTC.

Monitor Execution, Sequence, Duration, DTC Type

Execution	Continuous
Sequence	None
Duration	60 seconds or more
DTC Type	One drive cycle, MIL off

Enable Conditions

Condition	Minimum	Maximum
Engine speed [Engine Speed]	500 rpm	-
Other	LIN communication is OK

[ ]: HDS Parameter

Malfunction Threshold

The alternator internal temperature is 338 deg.F (170 deg.C) or more for at least 60 seconds.

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.

Ambient temperature extreme increase
Alternator internal failure

Diagnosis Details

Conditions for setting the DTC

When a malfunction is detected, a Pending DTC, a Confirmed DTC, the freeze data, and the on-board snapshot are stored in the PCM memory. The MIL does not come on.

Conditions for clearing the DTC

The Pending DTC, the Confirmed DTC, the freeze data, and the on-board snapshot can be cleared with the scan tool clear command.