Isuzu Trooper (2000 year). Manual - part 309
6E–365
TROOPER 6VE1 3.5L ENGINE DRIVEABILITY AND EMISSIONS
Diagnostic Trouble Code (DTC) P0601 PCM Memory
060RY014
Circuit Description
The powertrain control module (PCM) used in this vehicle
utilizes an electrically erasable programmable read-only
memory (EEPROM). The EEPROM contains program
information and the calibrations required for engine,
transmission, and powertrain diagnostics operation.
Unlike the PROM used in past applications, the EEPROM
is not replaceable. When the PCM is replaced or a
calibration update is required, the PCM must be
programmed using a Tech 2. Refer to
On-Vehicle Service
in
Powertrain Control Module and Sensors for the
EEPROM programming procedure.
Conditions for Setting the DTC
D
The PCM detects an internal program fault (check sum
error).
Action Taken When the DTC Sets
D
The PCM will not illuminate the malfunction indicator
lamp (MIL).
D
The PCM will store conditions which were present
when the DTC was set in the Failure Records data only.
Conditions for Clearing the MIL/DTC
D
The PCM will turn the MIL “OFF” on the third
consecutive trip cycle during which the diagnostic has
been run and the fault condition is no longer present.
D
A history DTC P0601 will clear after 40 consecutive
warm-up cycles have occurred without a fault.
D
DTC P0601 can be cleared by using the Tech 2 “Clear
Info” function or by disconnecting the PCM battery
feed.
Diagnostic Aids
D
DTC P0601 indicates that the contents of the
EEPROM have changed since the PCM was
programmed. The only possible repair is PCM
replacement. Remember to program the replacement
PCM with the correct software and calibration for the
vehicle.