DTC Advanced Diagnostics: P065A (3.0L Engine)

DTC P065A: ACG No Charging Malfunction

General Description

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

Driven by the engine, the alternator generates electricity according to the commands from the powertrain control module (PCM). The local interconnect network (LIN) line is connected to the alternator and transmits/receives information to/from the PCM. If the PCM receives mechanically or electrically abnormal of the alternator, 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 PCM receives mechanically or electrically abnormal of the alternator 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.

Alternator internal failure (voltage regulator failure)
Alternator rotation defection

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.