Diagnostic Trouble Code (Dtc) P1627 - Isuzu 1999 RODEO Workshop Manual

6E1–348 RODEO X22SE 2.2L ENGINE DRIVEABILITY AND EMISSION
DIAGNOSTIC TROUBLE CODE (DTC) P1627 PCM A/D CONVERSION
Circuit Description
The Powertrain Control Module (PCM) monitors the 5 volt
reference signal when the Ignition is ON. If the PCM
senses an Analog to Digital (A/D) conversion error within
the PCM, then DTC P1627 will set. DTC P1627 is a type A
code.
Conditions for Setting the DTC
f Engine is running.
f Any A/D DTC's set.
Action Taken When the DTC Sets
f The PCM will illuminate the Malfunction Indicator Lamp
(MIL) the first time the fault is detected.
f The PCM will store the conditions that were present
when the DTC was set as Freeze Frame and in Failure
Records.
MALFUNCTION
Conditions for Clearing the MIL/DTC
f The PCM will turn OFF the MIL on the third consecutive
trip without a reported failure.
f A History DTC will clear after 40 consecutive trips
without a reported failure.
f The DTC can be cleared using the Scan Tool's "Clear
Info" function.
Diagnostic Aids
f Poor connections, or a damaged harness – Inspect the
harness connectors for: backed–out terminals,
improper mating or damaged terminals. Also, check for
open circuits, shorts to ground, and shorts to voltage.
014RX002