DTC P062F: Powertrain Control Module (PCM) Internal Control Module Keep Alive Memory (KAM) Error (V6)

General Description 

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

The powertrain control module (PCM) is equipped with a keep alive memory (KAM). The data (control learn data, etc.) for powertrain control and information (vehicle identification number (VIN), etc.) related to the vehicle control is stored in the KAM, so that it can be maintained even when power is not supplied to the PCM, such as when the 12 volt battery is disconnected. When powered up, the CPU retrieves the stored information from the KAM, as well as writes data to the KAM (control related data is written when the vehicle is turned to the ON mode, and vehicle information when commanded from the HDS). When the data retrieval or data writing process is not finished normally, the PCM detects a malfunction and stores a DTC.

Monitor Execution, Sequence, Duration, DTC Type, OBD Status 

Execution	Continuous
Sequence	None
Duration	1 second or more
DTC Type	One drive cycle, MIL on
OBD Status	PASSED/FAILED/NOT COMPLETED (STILL TESTING)

Enable Conditions 

Condition
Vehicle	ON mode

Malfunction Threshold 

A malfunction is detected whenever the keep alive data retrieval and writing process is not completed normally.

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.

• PCM internal circuit 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 PCM 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 or by disconnecting the 12 volt battery.