Workshop Manual

6E–451
6VE1 3.5L ENGINE DRIVEABILITY AND EMISSIONS
Diagnostic Trouble Code (DTC) P1295 ETC Power Management Mode
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 The mass air flow (MAF) sensor measures the amount
of air which passes through it into the engine during a
given time. The powertrain Control Module (PCM)
uses the mass air flow information to monitor engine
operating conditions for fuel delivery calculations.
A large quantity of air entering the engine indicates
an accelerator or high load situation, while a small
quantity or air indicates deceleration or idle.
The MAF sensor produces a frequency signal which
can be monitored using a Tech 2. The frequency will
vary within a range of around 4 to 7g/s at idle to
around 25 to 40g/s at maximum engine load.
B This DTC detects that if the system is in Power
Management Mode.(Fail safe Mode)
Conditions for setting the DTC
B The ignition is “ON”.
B Power Management Mode is active. (Fail safe Mode)
Action Taken When the DTC Sets
B The PCM will illuminate the malfunction indicator lamp
(MIL) the first time the fault is detected.
B The PCM calculates an air flow value based on throttle
blade position, RPM and barometric pressure.
B The PCM will store conditions which were present
when the DTC was set as Freeze Frame and in the
Failure Records 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 P1295 will clear after 40 consecutive trip
cycles during which the warm up cycles have occurred
without a fault.
B DTC P1295 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