2007 FORD FIESTA Workshop Manual

31 0-02B-3 Acceleration Control - 2.OL Duratec-HE (M14) 31 0-02B-3
DESCRIPTION AND OPERATION
position from the throttle position (TP) sensors to
make sure that the requested position has been
lachieved .
N0TE:Do not install a new accelerator pedal
unless a relevant accelerator pedal DTC has been
stored in the PCM. For additional information refer
to WDS.
The accelerator pedal is a non-serviceable
component which cannot be adjusted and therefore
must not be disassembled or tampered with.
The throttle body is directly controlled by the PCM
and has two TP sensors, TP
1 and TP 2. The TP
sensors output a voltage to the PCM that
corresponds to the actual throttle plate position.
When the throttle body motor is not being powered
up, the throttle plate sits open at approximately 8
degrees from the closed in-bore position. This
position (also referred to as the default position),
is maintained within the throttle body by two internal
compression return springs acting in opposing
directions, these springs are a non-serviceable
item.
The PCM continuously monitors both APP sensors
and both TP sensors to make sure that the system
,is functioning as expected. All acceleration control
( 'system concerns will be detected by the PCM and
the appropriate diagnostic trouble code (DTC) set.
The malfunction indicator lamp (MIL), located in
the instrument cluster will also be illuminated if a
concern is apparent. As the acceleration control
system is of a safety-critical nature, it is possible
that a system concern will result in a reduced
vehicle performance and a DTC stored in the PCM.
For additional information refer to WDS.
2006.0 Fiesta 1212006 G422706en
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I <:: .
31 0-02B-4 Acceleration Control - 2.OL Duratec-HE (M14) 31 0-02~-4::'
DIAGNOSIS AND TESTING
Acceleration Control
lnspection and Verification
1. Verify the customer concern.
3. If an obvious cause for an observed or reported \.
concern is found, correct the cause (if possible)
before proceeding to the next step.
2. Visually inspect for obvious signs of mechanical 4. If the cause is not visually evident, verify the
or electrical damage. symptom
and refer to Symptom Chart.
Visual lnspection Chart
I Mechanical I Electrical I
- Accelerator pedal
- Electronic throttle
body
Fuse(s)
Wiring harness(s)
Electrical
connector(s)
Accelerator pedal
Electronic throttle
body
Powertrain control
module (PCM)
Symptom Chart
Accelerator pedal does not
return freely
Symptom Chart
Symptom Possible Sources Action
Accelerator pedal is hard to
depress or has a roughlraspy
or sticky feel
Adjacent hardware, wiring
harness(s), trim(s), carpet or
mat(s) incorrectly installed.
High engine idle speed
Adjacent hardware, wiring
harness(s), trim(s), carpet or
mat(s) incorrectly installed.
Worn or damaged accelerator
pedal.
CHECK the accelerator pedal
and adjacent parts for correct
installation.
worn or damaged accelerator
pedal. CHECK the
accelerator pedal
and adjacent parts for correct
installation.
INSTALL a new accelerator
pedal.
INSTALL a new accelerator
pedal.
Electronic throttle body. REFER to WDS to diagnose
the system.
Damaged
accelerator pedal.
I PCM calibration. REFER
to WDS to diagnose
the system.
REFER to WDS to diagnose
the system.
Poor idling I Electronic throttle body.
- - - - - - - -
2006.0 Fiesta 121200s ~426591 en
REFERto WDS todiagnose
the system.
PCM, calibration.
REFER to WDS to diagnose ),
1- ' the system.
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