Workshop Manual

6E–490
6VE1 3.5L ENGINE DRIVEABILITY AND EMISSIONS
Diagnostic Trouble Code (DTC)
P1523 Actuator Control Return Performance
D06RY00111
Circuit Description
B The throttle position (TP) sensor circuit provides a
voltage signal relative to throttle position (blade angle).
The throttle blade angle will vary from about 8 % at
closed throttle to about 92 % at wide open
throttle(WOT).
B The DC motor circuit provides a voltage signal relative
to command throttle position (blade angle).
B This DTC detects if the throttle return to the default
position at key on is steady.
Conditions for setting the DTC
B The ignition is “ON”.
B Normalized TPS is less than 7 % or Normalized TPS
is more than 25 %.
Action Taken When the DTC Sets
B The PCM will not turn the malfunction indicator lamp
(MIL) “ON”.
B 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 MIL/DTC
B 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.
B A history DTC P1523 will clear after 40 consecutive trip
cycles during which the warm up cycles have occurred
without a fault.
B DTC P1523 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:
B Poor connections.
B Misrouted harness.
B Rubbed through wire insulation.
B Broken wire inside the insulation.
Check for the following conditions:
B 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.
B Damaged harness-Inspect the wiring harness for
damage. If the harness appears to be OK, observe the
TP sensor 1, TP 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 P1523 cannot be duplicated, the
information included in the Failure Records data can
be useful in determining vehicle mileage since the
DTC was last set.