2003 FORD MUSTANG oil

PINPOINT TEST C: INCORRECT OIL PRESSURE GAUGE
INDICATION z
Operate the system and verify the concern is still present.
z Is the concern still present? normal operation.
No
The system is
operating correctly at
this time. Concern may
have been caused by
a loose or corroded
connector. CLEAR the
DTCs. REPEAT the
self-
test. Test Step Result / Action to
Take C1 CHECK THE INSTRUMENT CLUSTER OPERATION
CAUTION: Use the correct probe adapter(s) when
making measurements. Failure to use the correct probe
adapter(s) may damage the connector.
z Connect the diagnostic tool.
z Key in ON position.
z Enter the following diagnostic mode on the diagnostic tool:
Instrument Cluster Active Command.
z Trigger the instrument cluster active command OIL GAUGE.
Scroll to 0%, 50%, and 100%.
z Did the gauge display L at 0%, the middle of the gauge at
50%, and H at 100%? Yes
GO to
C2 .
No
GO to C3 .
C2 CHECK CIRCUIT 31 (WH/RD) FOR OPEN OR SHORT TO
GROUND z
Key in OFF position.
z Disconnect: Instrument Cluster C220b.
z Disconnect: Oil Pressure Switch C103.
z Measure the resistances between the instrument cluster C220b
pin 16, circuit 31 (WH/RD), harness side and the oil pressure
switch C103, circuit 31 (WH/RD), harness side; and between the
instrument cluster C220b pin 16, circuit 31 (WH/RD), harness
side and ground.
z Is the resistance less than 5 ohms between the instrument
cluster and the oil pressure switch, and greater than 10,000
ohms between the instrument cluster and ground? Yes
INSTALL a new oil
pressure switch. TEST
the system for normal
operation.
No
REPAIR the circuit.
TEST the system for
normal operation.
C3 CHECK FOR CORRECT INSTRUMENT CLUSTER OPERATION
z
Disconnect all instrument cluster connectors. Yes
INSTALL a new Klj . 18 ba
412003 Mustang Workshop Manual
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DESCRIPTION AND OPERATION
Charging System
The charging system is a negative ground system consisting of the following:
zgenerator
z internal voltage regulator
z charging system warning indicator
z storage battery
z necessary wiring and cables
The generator is belt- driven by the engine accessory drive system.
With the ignition key in the run position, voltage is applied through the warning indicator I circuit to the
voltage regulator. This turns the regulator on, allowing current to flow from battery sense A circuit to
the generator field coil. When the engine is started, the generator begins to generate alternating
current (AC) which is converted to direct current (DC) internally. This current is then supplied to the
vehicle's electrical system through the output terminal (B+) of the generator.
Once the generator begins generating current, a voltage signal is taken from the generator stator and
fed back to the internal regulator. This voltage feedback signal (typically half the battery voltage) is
used to turn off the warning indicator.
With the system functioning normally, the generator output current is determined by the voltage of the
A circuit. This A circuit voltage (battery sense circuit) is compared to a set voltage internal to the
regulator, and the regulator controls the generator field current to maintain the correct generator
output.
The set voltage will vary with temperature and is typically higher in cold temperatures than in warm
temperatures. This allows for better battery recharge in the winter and reduces the chance of
overcharging in the summer.
The battery is a 12 volt direct current source connected in a negative ground system. The battery case
is sealed and includes two vent holes to release gases. The battery has three major functions:
zengine cranking power source
z voltage stabilizer for the electrical system
z temporary power when electrical loads exceed the generator output current
Circuit Description
Battery Output Terminal (B+)
The generator output is supplied through the battery positive output (B+) terminal on the back of the
generator to the battery and electrical system.
I Circuit 904 (LG/RD)
The I (ignition) circuit is used to turn on the voltage regulator. This circuit is powered up with the
ignition key in the run position. This circuit is also used to turn the charging system warning indicator
on if there is a fault in the charging system operation. SECTION 414-
00: Charging System — General Information 2003 Mustang Workshop Manual Klj . 1 ba
22003 Mustang Workshop Manual
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Functionality
With the ignition switch in the RUN position, voltage is applied through the warning indicator I circuit
904 (LG/RD) to the voltage regulator. This turns the regulator on, allowing current to flow from battery
sense A circuit 36 (YE/WH) to the generator field coil. When the engine is started, the generator
begins to generate alternating current (AC) which is internally converted to direct current (DC). This
current is then supplied to the vehicle's electrical system through the output (B+) terminal of the
generator.
Once the generator begins generating current, a voltage signal is taken from the generator stator and
fed back to the regulator internally. This voltage feedback signal (typically half the battery voltage) is
used to turn off the warning indicator.
With the system functioning normally, the generator output current is determined by the voltage of the
A circuit. The A circuit voltage is compared to a set voltage internal to the regulator, and the regulator
controls the generator field current to maintain the correct generator output.
The set voltage will vary with temperature and is typically higher in cold temperatures and lower in
warm temperatures. This allows for better battery recharge in the winter and reduces the chance of
overcharging in the summer.
Battery Positive Output Circuit 38 (B+) (BK/OG)
The generator output is supplied through the battery positive output (B+) terminal on the back of the
generator to the battery and electrical system.
I Circuit 904 (LG/RD)
The I (ignition) circuit is used to turn on the voltage regulator. This circuit is powered up with the
ignition key in the run position. This circuit is also used to turn the charging system warning indicator
on if there is a fault in the charging system operation.
A Circuit 36 (YE/WH)
The A circuit or battery sense circuit is used to sense battery voltage. This voltage is used by the
regulator to determine generator output. This circuit is used to supply current to the generator field
(rotor). The amount of current supplied to the rotor will determine generator output.
Inspection and Verification
WARNING: Batteries contain sulfuric acid. Avoid contact with skin, eyes, or clothing.
Also, shield your eyes when working near batteries to protect against possible splashing of the
acid solution. In case of acid contact with skin or eyes, flush immediately with water for a
minimum of 15 minutes and get prompt medical attention. If acid is swallowed, call a physician
immediately.
WARNING: Batteries normally produce explosive gases which can cause personal injury.
Therefore, do not allow flames, sparks or lighted substances to come near the battery. When
charging or working near a battery, always shield your face and protect your eyes. Always Connector C102a End View
A Circuit 36 (YE/WH)
I Circuit 904 (LG/RD) Klj . 2 ba
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the oil pan clips.
10. NOTE: 4.6L 4V shown; 3.8L and 4.6L 2V similar.
Disconnect the oil pressure sender unit electrical connector.
11. CAUTION: Failure to tighten the negative cable ground nut may cause ground
circuit failure or arcing.
NOTE: 4.6L 2V shown; 3.8L and 4.6L 4V similar.
Remove the battery ground cable nut at the engine block.
12. Remove the nut and disconnect the generator electrical connections. zPosition the cover aside. Klj . 3 ba
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B1408 Driver Power Window Up
Circuit Short to Battery GEM REFER to
Section 501 - 11 .
B1410 Driver Power Window Motor
Circuit Failure GEM REFER to
Section 501 - 11 .
B1426 Lamp Safety Belt Circuit
Short to Battery GEM REFER to
Section 413 - 01 .
B1428 Lamp Safety Belt Circuit
Failure GEM REFER to
Section 413 - 01 .
B1431 Wiper Brake/Run Relay
Circuit Failure GEM REFER to
Section 501 - 16 .
B1432 Wiper Brake/Run Relay
Circuit Short to Battery GEM REFER to
Section 501 - 16 .
B1434 Wiper Hi/Low Speed Relay
Coil Circuit Failure GEM REFER to
Section 501 - 16 .
B1436 Wiper Hi/Low Speed Relay
Coil Circuit Short to Battery GEM REFER to
Section 501 - 16 .
B1438 Wiper Mode Select Switch
Circuit Failure GEM REFER to
Section 501 - 16 .
B1441 Wiper Mode Select Switch
Circuit Short to Ground GEM REFER to
Section 501 - 16 .
B1446 Wiper Park Sense Circuit
Failure GEM REFER to
Section 501 - 16 .
B1448 Wiper Park Sense Circuit
Short to Battery GEM REFER to
Section 501 - 16 .
B1450 Wiper Wash/Delay Switch
Circuit Failure GEM REFER to
Section 501 - 16 .
B1453 Wiper Wash/Delay Switch
Circuit Short to Ground GEM REFER to
Section 501 - 16 .
B1458 Wiper Washer Pump Motor
Relay Circuit Failure GEM REFER to
Section 501 - 16 .
B1460 Wiper Washer Pump Motor
Relay Coil Circuit Short to Battery GEM REFER to
Section 501 - 16 .
B1462 Safety Belt Switch Circuit
Failure GEM REFER to
Section 413 - 09 .
B1466 Wiper Hi/Low Speed Not
Switching GEM REFER to
Section 501 - 16 .
B1473 Wiper Low Speed Circuit
Motor Failure GEM REFER to
Section 501 - 16 .
B1476 Wiper High Speed Circuit
Motor Failure GEM REFER to
Section 501 - 16 .
B1551 Decklid Release Circuit
Failure GEM REFER to
Section 501 - 14B .
B1553 Decklid Release Circuit
Short to Battery GEM REFER to
Section 501 - 14B .
B1555 Ignition Run/Start Circuit
Failure GEM REFER to
Section 211 - 05 .
B1687 Lamp Dome Input Circuit
Short to Battery GEM REFER to
Section 417 - 02 .
B2486 LF Side Repeater Lamp GEM REFER to
Section 417 - 01 . Klj . 4 ba
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Symptom Chart B2139 PCM ID Does Not Match Between Instrument Cluster and
PCM ICM GO to
Pinpoint Test J .
B2141 NVM Configuration Failure (No PCM ID Exchange
Between Instrument Cluster and PCM) ICM GO to
Pinpoint Test K .
B2143 NVM Memory Failure ICM REFER to
Section 413
- 01
C1284 Oil Pressure Switch Failure ICM REFER to
Section 413
- 01 .
U1147 SCP Invalid or Missing Data for Vehicle Security PCM/SCP GO to
Pinpoint Test C .
U1262 Missing SCP Message J1850 REFER to
Section 418
- 00 .
Symptom Chart Condition
Possible Sources Action
z No communication
with the instrument
cluster z
Central junction box
Fuses:
„5 (15A)
„ 21 (5A)
„ 34 (20A)
z Circuitry
z Instrument cluster z
GO to Pinpoint Test A .
z The anti- theft
indicator is
always/never on —
no three second
theft indicator prove
out z
Instrument cluster
z Theft indicator z
GO to Pinpoint Test B .
z The vehicle does not
start — theft
indicator proves out
for three seconds as
normal z
Less than two keys
programmed to the
system
z Transceiver not
connected/defective
z Circuitry
z Transceiver internal
antenna damaged
z NON- PATS key,
damaged key or no
code received
z Partial key read of
PATS key
z Unprogrammed
PATS key z
CARRY OUT Instrument
Cluster On- Demand
Self- Test. RETRIEVE
DTCs. If DTCs are
present, GO to
Instrument Cluster
Diagnostics Trouble
Code (DTC) Index. If no
DTCs are retrieved,
CHECK for other
possible no- start
causes.
z No PCM ID stored in
PATS
z PATS/PCM ID do not
match
z Problem with SCP
link z
CLEAR the stored
DTCs. CYCLE the
ignition key from OFF to
RUN. RETRIEVE
continuous DTCs. If
DTCs are present, GO
to Instrument Cluster
Diagnostics Trouble
Code (DTC) Index. If no Klj . 3 ba
182003 Mustang Workshop Manual
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SPECIFICATIONS
SECTION 501-
03: Body Closures 2003 Mustang Workshop Manual General Specifications
Item Specification
Premium Long Life Grease XG-1-
C or
XG -1-K ESA-
M1C75- B Silicone Lubricant (Aerosol) F5AZ-
19553-
AA ESR-
M13P4-A Multi-
Purpose Grease Spray XL-5 ESB-
M1C93- B Flowable air dry paintable caulk ESB-
M4G24- A Door clearance: bottom of the door to
the rocker panel 3.0-
7.0 mm (0.118- 0.275 in) parallel top to bottom within
2.0 mm (0.08 in) Door clearance: front and rear of the
door to the body 3.0-
7.0 mm (0.118- 0.275 in) parallel with the body opening
within 1.0 mm (0.04 in) Door flushness: door to the front fender -
1.0- 0.00 mm (- 0.04-0.00 in)
Torque Specifications Description Nm lb-
ft lb-
in Door latch striker plate bolts 25 18 —
Door hinge nuts and bolts 30 22 —
Luggage compartment lid hinge bolts 30 22 —
Luggage compartment lid hinge nuts 13 10 —
Rear spoiler nuts/screws 9 — 80 Klj . 1 ba
22003 Mustang Workshop Manual
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SPECIFICATIONS
SECTION 501-
08: Exterior Trim and Ornamentation 2003 Mustang Workshop Manual Torque Specifications
Description Nm lb-
in Hood scoop 3 27
Radiator grille screws 6 53
Rear spoiler nuts/screws 9 80
Roof side moulding screws 3 27
Roof side moulding nuts 3 27 Klj . 1 ba
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