turn signal FORD MUSTANG 2003 Workshop Manual

„
Loudness proportional to vehicle speed. Low- frequency noise at high
speeds, noise and loudness increase with speed. GO to Symptom Chart —
Driveline Noise/Vibration .
„ A low- pitched noise (drumming). GO to Symptom Chart — Engine
Noise/Vibration .
„ Vibration occurs at a particular speed (mph) regardless of acceleration or
deceleration. GO to Symptom Chart — Tire Noise/Vibration .
„ Noise varies with wind/vehicle speed and direction. GO to Symptom Chart — Air Leak and Wind Noise .
„ Related to engine speed.
„Noise varies with engine rpm. GO to Symptom Chart — Engine
Noise/Vibration .
„ Vibration occurs at a particular speed (mph) regardless of engine speed
(rpm).
2. Acceleration
„Wide open throttle (WOT)
„Engine induced contact between components. Inspect and repair as
necessary.
„ Noise is continuous throughout WOT. Exhaust system or engine ground
out. GO to Symptom Chart — Engine Noise/Vibration .
„ Light/moderate acceleration
„Tip- in moan. Engine/exhaust noise. GO to Symptom Chart — Engine
Noise/Vibration .
„ Knock-type noise. GO to Symptom Chart — Engine Noise/Vibration .
„ Driveline shudder. GO to Symptom Chart — Driveline Noise/Vibration .
„ Engine vibration. GO to Symptom Chart — Engine Noise/Vibration .
3. Turning noise. GO to Symptom Chart — Steering Noise/Vibration .
4. Braking
„Clicking sound is signaling ABS is active. Acceptable ABS sound.
„ A continuous grinding/squeal. GO to Symptom Chart — Brake Noise/Vibration .
„ Brake vibration/shudder. GO to Symptom Chart — Brake Noise/Vibration .
5. Clutching
„A noise occurring during clutch operation. GO to Symptom Chart — Transmission
(Manual) and Transfer Case Noise/Vibration .
„ Vibration. GO to Symptom Chart — Transmission (Manual) and Transfer Case
Noise/Vibration .
6. Shifting
„Noise or vibration condition related to the transmission (automatic). GO to
Symptom Chart — Transmission (Automatic) Noise/Vibration .
„ Noise or vibration related to the transmission (manual). GO to Symptom Chart —
Transmission (Manual) and Transfer Case Noise/Vibration .
7. Engaged in four- wheel drive. GO to Symptom Chart — Transmission (Manual) and
Transfer Case Noise/Vibration .
8. Cruising speeds
„Accelerator pedal vibration. GO to Symptom Chart — Engine Noise/Vibration .
„ Driveline vibration. GO to Symptom Chart — Driveline Noise/Vibration .
„ A shimmy or shake. GO to Symptom Chart — Tire Noise/Vibration .
9. Driving at low/medium speeds Klj . 11 ba
702003 Mustang Workshop Manual
17. 11. 2011file:///C:/Ford/2000 - 2004/tsocache/SHEF_4464/S3B~us~en~ ...

3. If the concern remains after the inspection, connect the scan tool to the data link connector
(DLC) located beneath the instrument panel and select the vehicle to be tested from the scan
tool menu. If the scan tool does not communicate with the vehicle: 1. Check that the program card is correctly installed.
2. Check the connections to the vehicle.
3. Check the ignition switch position.
4. If the scan tool still does not communicate with the vehicle, refer to the scan tool Manual.
5. Carry out the DATA LINK DIAGNOSTIC TEST. If the scan tool responds with: 1. CKT914, CKT915 or CKT70 = ALL ECUS NO RESP/NOT EQUIP, refer to Section 418-00.
2. NO RESP/NOT EQUIP for the anti- lock brake control module, Go To Pinpoint Test A .
3. SYSTEM PASSED, retrieve and record the continuous diagnostic trouble codes (DTCs), erase the continuous DTCs and carry out self- test diagnostics for the anti-lock brake
control module.
6. If the DTCs retrieved are related to the concern, go to the Anti- Lock Brake Control Module
Diagnostic Trouble Code (DTC) Reference Chart to continue diagnostics.
7. If no DTCs related to the concern are retrieved, GO to Symptom Chart to continue diagnostics.
Anti-Lock Brake Control Module Diagnostic Trouble Code (DTC) Index
NOTE: If a wheel speed signal fault or a pump motor fault is detected, the yellow ABS warning
indicator cannot be reset with the key OFF and key ON method. The vehicle must be driven over 12
km/h (8 mph) for the anti- lock brake control module to carry out a re- check of the system before the
yellow ABS warning indicator is turned OFF. Visual Inspection Chart Mechanical Electrical
z
Low brake fluid
z Anti- lock brake sensor
z Anti- lock brake sensor indicator
z Base brake system z
Central junction box (CJB)Fuse:
„15 (10A)
„ 29 (15A)
„ 33 (15A)
„ 35 (15A)
z Battery junction box (BJB) Fuse:
„ABS 1 (50A)
„ ABS 2 (20A)
z Circuitry
z Damaged or corroded connectors
z Yellow ABS warning indicator
z Loose grounds
Anti-Lock Brake Control Module Diagnostic Trouble Code (DTC) Index DTC Description Source Action
B1318 Battery Voltage Low ABS Go To Pinpoint Test C .
B1342 ECU Is Defective ABS INSTALL a new anti-
lock brake control module;
REFER to Module . REPEAT the self-
test. B1484 Brake Pedal Input Open Circuit ABS Go To Pinpoint Test D . Klj . 2 ba
162003 Mustang Workshop Manual
17. 11. 2011file:///C:/Ford/2000 - 2004/tsocache/SHEF_4464/S3B~us~en~ ...

Inspection and Verification
1. Verify the customer concern by operating the system.
2. Visually inspect for obvious signs of mechanical and electrical damage.
3. If the concern remains after the inspection, connect the scan tool to the data link connector (DLC) located beneath the instrument panel and select the vehicle to be tested from the scan
tool menu. If the scan tool does not communicate with the vehicle: 1. Check that the program card is correctly installed.
2. Check the connections to the vehicle.
3. Check the ignition switch position.
4. If the scan tool still does not communicate with the vehicle, refer to the scan tool manual.
5. Carry out the DATA LINK DIAGNOSTIC TEST. If the scan tool responds with: 1. CKT914, CKT915 or CKT70 = ALL ECUS NO RESP/NOT EQUIP, refer to Section 418-00.
2. NO RESP/NOT EQUIP for the anti- lock brake control module, Go To Pinpoint Test A .
3. SYSTEM PASSED, retrieve and record the continuous diagnostic trouble codes (DTCs),
erase the continuous DTCs and carry out self- test diagnostics for the anti-lock brake
control module.
6. If the DTCs retrieved are related to the concern, go to the Anti- Lock Brake Control Module
Diagnostic Trouble Code (DTC) Index to continue diagnostics.
7. If no DTCs related to the concern are retrieved, GO to Symptom Chart to continue diagnostics.
Anti-Lock Brake Control Module Diagnostic Trouble Code (DTC) Index
NOTE: If a wheel speed signal fault or a pump motor fault is detected, the yellow ABS warning
indicator cannot be reset with the key OFF and key ON method. The vehicle must be driven over 12
km/h (8 mph) for the anti- lock brake control module to do a re- check of the system before the yellow
ABS warning indicator is turned OFF. Visual Inspection Chart Mechanical Electrical
z
Low brake fluid
z Anti- lock brake sensor
z Anti- lock brake sensor indicator
z Base brake system
z Wheel bearings z
Central junction box (CJB) Fuse:
„5 (15A)
„ 15 (10A)
„ 29 (15A)
„ 33 (15A)
„ 35 (15A)
z Battery junction box (BJB) Fuse:
„ABS 1 (50A)
„ ABS 2 (20A)
z Circuitry
z Damaged or corroded connectors
z ABS warning indicator
z Loose grounds Klj . 2 ba
202003 Mustang Workshop Manual
17. 11. 2011file:///C:/Ford/2000 - 2004/tsocache/SHEF_4464/S3B~us~en~ ...

DESCRIPTION AND OPERATION
Steering Column Switches
The steering column switches system consists of the following components:
zmultifunction switch (13K359)
z key release button (manual transmission only) (3F527)
z ignition switch (11572)
The integrated multifunction switch is mounted to the LH side of the steering column and controls the
turn signals, hazard flasher, windshield wiper/washer control, and headlamp dimmer/flash- to-pass.
The key release button is equipped with manual transmissions only.
The ignition switch is mounted below the steering column and is activated by rotating the key lock
cylinder on the steering column. SECTION 211-
05: Steering Column Switches 2003 Mustang Workshop Manual Klj . 1 ba
12003 Mustang Workshop Manual
17. 11. 2011file:///C:/Ford/2000 - 2004/tsocache/SHEF_4464/S3B~us~en~ ...

DIAGNOSIS AND TESTING
Steering Column Switches
Refer to Wiring Diagrams Cell
13 , Power Distribution for schematic and connector information.
Refer to Wiring Diagrams Cell 81 , Interval Wiper/Washer for schematic and connector information.
Refer to Wiring Diagrams Cell 85 , Headlamps for schematic and connector information.
Refer to Wiring Diagrams Cell 90 , Turn/Stop/Hazard Lamps for schematic and connector information.
Inspection and Verification 1. Verify the customer concern by operating the multifunction or ignition switch.
2. Visually inspect for obvious signs of mechanical and electrical damage.
3. If the concern remains after the inspection, connect the scan tool to the data link connector (DLC) located beneath the instrument panel and select the vehicle to be tested from the scan
tool menu. If the scan tool does not communicate with the vehicle:
zcheck that the program card is correctly installed.
SECTION 211-
05: Steering Column Switches 2003 Mustang Workshop Manual Special Tool(s)
Worldwide Diagnostic System
(WDS)
418-
F224,
New Generation STAR (NGS)
Tester
418- F052, or equivalent scan
tool 73 Digital Multimeter
105-
R0051 or equivalent
Visual Inspection Chart Mechanical Electrical
z
Ignition key
z Ignition switch
z Multifunction switch
z Turn signal switch
z Hazard/flasher switch z
Battery junction box (BJB) Fuses:
„(3) IGN (40A)
z Central junction box (CJB) Fuses:
„6 (25A)
„ 39 (5A)
z Damaged wiring harness
z Loose or corroded connections Klj . 1 ba
82003 Mustang Workshop Manual
17. 11. 2011file:///C:/Ford/2000 - 2004/tsocache/SHEF_4464/S3B~us~en~ ...

DESCRIPTION AND OPERATION
Engine Ignition
The ignition coil (12029), which is mounted on the upper intake manifold, can be described as a coil
pack containing three separate coil units. Each coil unit is individually controlled by the powertrain
control module (PCM) (12A650) through separate wire leads. Each coil unit activates two spark plugs
wired in a series by the spark plug wires (12286).
zOne spark plug activates on the compression stroke and uses the majority of the ignition coil's
stored energy.
z The other spark plug activates on the exhaust stroke and uses very little of the ignition coil's
stored energy.
z Because the pairs of spark plugs are connected in a series, one spark will travel from ground to
the electrode while the other spark will travel from the electrode to ground.
The spark plug (12405):
zchanges the high voltage pulse into a spark which ignites the fuel and air mixture.
z originally equipped on the vehicle has a platinum- enhanced active electrode for long life.
The crankshaft position (CKP) sensor (6C315):
NOTE: Initial engine ignition timing is set at 10 degrees ± 2 degrees before top dead center (BTDC)
and is not adjustable.
zis a variable reluctance sensor triggered by a 36- minus-1 tooth trigger pulse wheel located on
the crankshaft (6303) inside the engine front cover (6019).
The sine wave type signal generated from the crankshaft position sensor provides two types of
information:
zposition of the crankshaft in 10 degree increments
z the crankshaft speed (rpm)
The powertrain control module (PCM) (12A650) uses this information to determine ignition coil turn ON
and turn OFF times and misfire detection.
For additional information, refer to Section 303 - 14 .
SECTION 303-
07A: Engine Ignition — 3.8L 2003 Mustang Workshop Manual Klj . 1 ba
22003 Mustang Workshop Manual
18. 11. 2011file:///C:/Ford/2000 - 2004/tsocache/SHEF_4464/S3B~us~en~ ...

DESCRIPTION AND OPERATION
Engine Ignition
Eight separate ignition coils (12029):
zare mounted directly above each spark plug (12405).
z are controlled by the powertrain control module (PCM) for correct firing sequence.
The spark plug:
zchanges the high voltage pulse into a spark which ignites the fuel and air mixture.
z originally equipped on the vehicle has a platinum- enhanced active electrode for long life.
Crankshaft position (CKP) sensor (6C315):
NOTE: Initial engine ignition timing is set at 10 degrees ± 2 degrees before top dead center (BTDC)
and is not adjustable. For additional information, refer to the Powertrain Control/Emissions Diagnosis
(PC/ED) manual.
zis a variable reluctance sensor triggered by a 36- minus-1 tooth trigger pulse wheel located on
the crankshaft (6303) inside the engine front cover (6019).
The sine wave type signal generated from the crankshaft position sensor provides two types of
information:
zposition of the crankshaft in 10 degree increments
z the crankshaft speed (rpm)
The powertrain control module (PCM) (12A650) uses this information to determine ignition coil turn ON
and turn OFF times and misfire detection.
For additional information, refer to Section 303 - 14 .
SECTION 303-
07B: Engine Ignition — 4.6L (2V) 2003 Mustang Workshop Manual Klj . 1 ba
22003 Mustang Workshop Manual
18. 11. 2011file:///C:/Ford/2000 - 2004/tsocache/SHEF_4464/S3B~us~en~ ...

z
the color stripe of the vacuum hoses.
The PCV system uses the intake manifold vacuum to ventilate the crankcase and return the fumes to
the intake manifold for combustion.
EGR System Components
The EGR system returns a portion of the exhaust gas to the intake manifold to reduce the combustion
temperature. This results in lower nitrous oxide formation.
The powertrain control module (PCM) controls the EGR vacuum regulator solenoid . The EGR vacuum
regulator solenoid controls the vacuum to the EGR valve. When the EGR valve opens, exhaust gas
flows to the intake manifold. The EGR transducer measures the flow through the EGR valve to exhaust
manifold tube and sends a signal to the powertrain control module. A metering orifice in the EGR valve
to exhaust manifold tube restricts the flow rate when the EGR valve is open.
The PCV valve:
zcontrols the amount of ventilating air and blow- by gases going to the intake manifold.
z prevents a backfire from reaching the crankcase.
The EGR valve to exhaust manifold tube:
zconnects the exhaust manifold to the EGR valve.
z has two tubes connecting to the EGR transducer for EGR flow monitoring.
The EGR transducer:
zmonitors the EGR flow rate through the EGR valve to exhaust manifold tube.
z sends an EGR flow rate signal to the powertrain control module.
The EGR vacuum regulator solenoid uses input from the powertrain control module to change the
EGR valve operation. Item Part Number Description
1 12A65 Powertrain control module
2 9J459 EGR vacuum regulator solenoid
3 9D475 EGR valve
4 9J433 EGR transducer
5 — Metering orifice
6 9D477 EGR valve to exhaust manifold tube Klj . 2 ba
32003 Mustang Workshop Manual
18. 11. 2011file:///C:/Ford/2000 - 2004/tsocache/SHEF_4464/S3B~us~en~ ...

DIAGNOSIS AND TESTING
Transmission Connector Layouts
Transmission Vehicle Harness Connector
Transmission Internal Harness Connector SECTION 307-
01: Automatic Transaxle/Transmission 2003 Mustang Workshop Manual Pin Number Circuit Circuit Function
1 — NOT USED
2 — Signal Return
3 — Torque Converter Clutch (TCC) Solenoid
4 — Vehicle Power
5 — Transmission Fluid Temperature (TFT) Input
6 — Electronic Pressure Control (EPC) Solenoid
7 — SSA
8 — SSB
9 — NOT USED
10 — NOT USED Klj . 1 ba
42003 Mustang Workshop Manual
18. 11. 2011file:///C:/Ford/2000 - 2004/tsocache/SHEF_2748/S3B~us~en~ ...

Digital Transmission Range (TR) Sensor Connector Pin Number Circuit Circuit Function
1 — NOT USED
2 — Signal Return Transmission Fluid Temperature (TFT)
3 — Torque Converter Clutch (TCC)
4 — Vehicle Power To Solenoid
5 — Transmission Fluid Temperature (TFT)
6 — Electronic Pressure Control
7 — SSA
8 — SSB
9 — NOT USED
10 — NOT USED
Pin Number Circuit Circuit Function Klj . 2 ba
42003 Mustang Workshop Manual
18. 11. 2011file:///C:/Ford/2000 - 2004/tsocache/SHEF_2748/S3B~us~en~ ...