Page 881 of 1226
303-07A-3 Engine Ignition 303-07A-3
DIAGNOSIS AND TESTING
Engine lgnition
lnspection and Verification
1. Verify the customer concern.
2. Visually inspect for obvious signs of mechanical
or electrical damage.
Visual Inspection Chart
I Mechanical I Electrical I
3. If an obvious cause for an observed or reported
concern is found, correct the cause (if possible)
before proceeding to the next step.
- Spark plug wire(s)
- Spark plug(s)
- Ignition coil pack
4. If the concern remains after visual inspection,
use WDS to diagnose the system.
- Wiring harness
- Electrical
connector(s)
2006.0 Fiesta 1212006 G28729en
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Page 885 of 1226

Engine lgnition - 2.OL Duratec-HE (M14)
DIAGNOSIS AND TESTING
Engine lgnition
General Equipment
I Worldwide Diagnostic System (WDS) I
lnspection and Verification
I. Verify the customer concern.
2. Visually inspect for obvious signs of electrical
damage.
Symptom Chart
Visual lnspection Chart
Symptom Chart Symptom
I Electrical I
( I
Wiring harness
Electrical
connector(s)
Spark plug(s)
Spark plug wire(s)
lgnition coil pack
Powertrain control module (PCM)
Engine misfire
3. If an obvious cause for an observed or reported
concern is found, correct the cause (if possible)
before proceeding to the next step.
4. If the cause is not visually evident, verify the
symptom and refer to the Symptom Chart.
Possible Sources Action
Spark plug(s).
Spark plug wire(s).
CARRY OUT a KV test using
I WDS.
lgnition coil pack.
PCM.
PCM calibration.
REFER to WDS.
Engine stumbling Spark plug(s).
Spark plug wire(s).
CARRY
OUT a KV test using
I WDS.
lgnition coil pack.
PCM.
PCM calibration.
REFER to WDS.
Engine lacks power Spark
plug(s).
spark plug wire(s).
CARRY
OUT a KV test using
I WDS.
nlgniibn coil pack. I REFER to WDS. I
2006.0 Fiesta IZIZOO~ GI 7859en
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Page 900 of 1226

Engine Emission Control - 2.OL Duratec-HE
303-08B-6
(MI41 303-08B-6
DIAGNOSIS AND TESTING
Engine Emission Control
lnspection and Verification
General Equipment Visual Inspection Chart L..
I. Verify the customer concern.
2. Visually inspect for obvious signs of mechanical
or electrical damage.
Worldwide Diagnostic System
(WDS)
- Hose(s)/hose joints
- Gasket(s)
- Positive crankcase
ventilation (PCV)
valve
- PCV separator
Mechanical
- Exhaust gas recircu-
lation (EGR) valve
Electrical
- Electrical
con
nector(s)
- Wiring harness
- Fuse(s)
- Relay
- EGRvalve
- Powertain control
module (PCM)
3. If an obvious cause for an observed or reported
concern is found, correct the cause (if possible)
before proceeding to the next step.
4. If the concern is not visually evident, verify the
symptom and refer to the Symptom Chart.
Symptom Chart
Symptom Chart
Symptom Possible Sources Action
I
Poor engine performance EGR valve.
Using WDS, CHECK the EGR
Valve Duty Cycle input signal
I to the EGR vacuum regulator
valve. If the result is 0%,
REMOVE the EGR valve.
REFER to Exhaust Gas Recir-
culation (EGR) Valve
- in this
section.
INSPECT the EGR valve and
valve seat for damage. Make
sure that the EGR valve is in
the closed position. If the EGR
valve is not closed. INSTALL
a
new EGR valve. TEST the
system for normal operation. If
the result is not 0% continue
the engine diagnostic using
WDS.
2006.0 Fiesta 1212006 G334290en
Excessive crankcase pressure Blocked or damaged PCV
hose(s).
Blocked crankcase vent oil
separator. CHECK
the PCV system
components for blockages, CLEAN or INSTALL new
components as necessary.
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Page 921 of 1226
303-1 3-3 Evaporative Emissions 303-1 3-3
DIAGNOSIS AND TESTING
Evaporative Emissions
i
Inspection and Verification
1. Verify the customer concern.
2. Visually inspect for obvious signs of mechanical
or electrical damage.
Visual Inspection Chart
I Mechanical I Electrical I
- Vacuum line(s)
- Evaporative emis-
sion (EVAP) system
canister
- EVAP system
hose(s)
- EVAP system
canister purge valve
I - Fuse(s) I I - Wiring harness
- Electrical
connector(s)
3. If an obvious cause for an observed or reported
concern is found, correct the cause (if possible)
before proceeding to the next step.
4. If the cause is not visually evident, verify the
i
' symptom and refer to WDS to diagnose the
' system.
2006.0 Fiesta 12/2006 G28748en
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Page 945 of 1226

303-1 4-21 Electronic Engine Controls 303-1 4-21
DIAGNOSIS AND TESTING
lnspection and Verification
MIL Code
U0121
U0122
U0155
B1213
B1600
B1601
B1602
B1681
B2103
B2139
B2141
B2431
U2510
1. Verify the customer concern by operating the
( I system.
2. Visually inspect for obvious signs of mechanical
or electrical damage. Description
CAN missing frame from ABS
CAN missing frame from ESP
CAN missing frame from HEC
Number of Passive Anti-Theft System (PATS) programmed keys is below minimum
PATS ignition key transponder signal is not received
PATS received incorrect key-code from ignition key transponder
PATS received invalid format of key-code from ignition key transponder
PATS transceiver module signal is not received
PATS immobilizer antenna not connected
PATS immobilizer challenge response doesn't match
PATS immobilizer no PCM-ID transferred
PATS immobilizer transponder programming failure
PATS immobilizer problem with messages on data link
Visual Inspection Chart
Mechanical
I Electrical
- Sensors
- Actuators - Wiring harness
- Electrical
connector(s)
- Powertrain control
module (PCM)
3. If an obvious cause for an observed or reported
concern is found, correct the cause (if possible)
before proceeding to the next step.
4. If the cause is not visually evident, verify the
symptom and refer to WDS or equivalent scan
tool for further diagnostics.
- -
2006.0 Fiesta 1212006 G384566en
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Page 948 of 1226

303-1 4-24 Electronic Engine Controls 303-1 4-24
Powertrain Control Module (PCM) - 2.OL Duratec-HE (M14),
Vehicles With: PCM Security Shield c
N0TE:lf a new PCM is being installed connect the 4. Remove the PCM mounting bracket lower
Worldwide Diagnostic System (WDS). Upload the retaining bolt.
PCM configuration information using the
programmable modules installation routine prior to
commencing the removal of the PCM.
1. Remove the battery tray.
For additional information, refer to: Battery
Tray
(414-01, Removal and Installation).
2. Raise and support the vehicle.
For additional information, refer to: Lifting
(1 00-02 Jacking and Lifting, Description
and Operation).
3. Disconnect the ambient air temperature
sensor electrical connector and detach the
wiring harness from the retaining clip.
5. Lower the vehicle.
6. Remove the PCM mounting bracket upper
retaining bolt.
7. Position the PCM, PCM retaining bracket and
PCM mounting bracket on the battery tray
support panel.
8. Remove the components in the order
indicated in the following
illustration(s) and
table(s).
2006.0 Fiesta 1212006 G422234en
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Page 951 of 1226
303-1 4-27 Electronic Engine Controls 303-1 4-27
REMOVAL AND INSTALLATION
Powertrain Control Module (PCM) - 2.OL Duratec-HE (M14),
Vehicles Without: PCM Security Shield
N0TE:lf a new PCM is being installed connect 2. Disconnect the ambient air temperature
WDS. Upload the PCM configuration information sensor electrical connector and detach the
using the programmable modules installation wiring harness from the retaining clip.
routine prior to commencing the removal of the
PCM.
1. Disconnect the battery ground cable.
For additional information, refer to: Battery
Disconnect
(414-01 Battery, Mounting and
Cables, General Procedures).
3. Remove the components in the order
indicated in the following
illustration(s) and
table(s).
2006.0 Fiesta 1212006 G422233en
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Page 989 of 1226

Automatic Transmission/Transaxle -
Vehicles With: 4-Speed Automatic
Transmission (AW81-40)
DESCRIPTION AND OPERATION
Item Description
1 5 1 Generic Electronic Module (GEM) I
I
1 6 1 Turbine Shaft Speed (TSS) sensor I
1 7 1 Output Shaft Speed (OSS) sensor I
1
2
3
4
l tem Description
Transmission control unit
Data Link Connector (DLC)
Powertrain Control Module (PCM)
Instrument cluster
1 8 I Transmission Range (TR) sensor I
1 9 1 Starter inhibit relay I
1 10 1 Backup lamp relay I
11 Transmission Fluid Temperature (TFT)
I I sensor
1 12 loverdrive switch I
1 13 1 Driver's side door ajar switch I
1 14 1 Solenoid valves in the main control body 1
Transmission control unit
Item Description
Electrical connector, vehicle wiring
harness
connector, transmission wiring
harness
--
The transmission control unit is located in the
'engine compartment on the left-hand side member.
The transmission control unit evaluates incoming
signals and controls the actuators accordingly.
2006.0 Fiesta 1212006 G380530en
procarmanuals.com