6E–384
6VE1 3.5 ENGINE DRIVEABILITY AND EMISSIONS
Diagnostic Trouble Code (DTC) P1271 APS 1– 2 Correlation Error
D06RY00075
Circuit Description
D
The acceleration position (AP) sensor circuit provides
a voltage signal relative to acceleration pedal angle.
The acceleration pedal angle (AP1) will vary about
13% at idle position to about 87% at wide open
throttle(WOT).
This code detects a correlation error between APS1
and APS2.
Conditions for setting the DTC
D
The Ignition is “ON”.
D
The acceleration pedal angle difference is less than 4.5
% between ASP1 and APS2 for 50 counts within 50
test samples (15.6 m sec).
Action Taken When the DTC Sets
D
The PCM will store condition which were present when
the DTC was set as Freeze Frame and in the Failure
Records data.
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 P1271 will clear after 40 consecutive trip
cycle during which the warm up cycles have occurred
without a fault.
D
DTC P1271 can be cleared using the Tech 2 “Clear
Info” function or by disconnecting the PCM battery
feed.
Diagnostic Aids
An intermittent may be caused by the following:
D
Poor connectons.
D
Mis routed harness.
D
Rubbed through wire insulation.
D
Broken wire inside the insulation.
Check for the following conditions:
D
Poor connection at PCM-Inspect harness connectors
for backed out terminals, improper mating, broken
locks, improperly formed or damaged terminals, and
poor terminal to wire connection.
D
Damaged harness-Inspect the wiring harness for
damage. If the harness appears to be OK, observe the
APP sensor 1, APP sensor 2 display on the Tech 2
while moving connectors and wiring harnesses related
to the sensor.
A change in the display will indicate the location of
the fault. If DTC P1271 cannot be duplicated,the
information included in the Faillure Records data can
be useful in determined vehicle mileage since the
DTC was last set.
If it is determined that the DTC occurs intermittently,
performing the DTC P1271 Diagnostic Chart may
isolate the cause of the fault.