Diagnostic Trouble Code (Dtc) P1625 Pcm Unexpected Reset - Isuzu 1999 RODEO Workshop Manual

6E1–346 RODEO X22SE 2.2L ENGINE DRIVEABILITY AND EMISSION

Diagnostic Trouble Code (DTC) P1625 PCM Unexpected Reset

Circuit Description
The powertrain control
unexpected PCM reset. This will not turn on MIL light on,
only records code DTC P1625.
Conditions for Setting the DTC
f Clock or COP (Computer Operating Properly) reset.
Action Taken When the DTC Sets
f The PCM will not illuminate the malfunction indicator
lamp (MIL).
f The PCM will store conditions which were present
when the DTC was set as Failure Records only. This
information will not be stored as Freeze Frame data.
Conditions for Clearing the DTC
f 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.
module (PCM) monitors
f A history DTC P1625 will clear after 40 consecutive
warm-up cycles have occurred without a fault.
f DTC P1625 can be cleared by using the Tech 2 "Clear
Info" function or by disconnecting the PCM battery
feed.
Diagnostic Aids
Check for the following conditions:
f P1625 alone stored does not need diagnosis. Clear
DTC code.
NOTE: DTC P1625 is a DTC to record a PCM reset
history. If DTC P1625 is not reset and no engine
abnormality is found after clearance of DTC, it is not
necessary to do any farther processing.
014RX002