turn signal FORD MUSTANG 2003 Owner's Manual

Instrument Cluster—
Cobra 14 — Traction control indicator
15 — Overdrive off (O/D OFF) indicator (automatic
transmission)
16 — LOW FUEL level indicator
17 — SERVICE ENGINE SOON indicator
18 — THEFT indicator
19 — AIR BAG warning indicator
20 — Charging system indicator
21 — Safety belt warning indicator
Item Part
Number Description
1 — Fuel gauge
2 — Engine coolant temperature gauge
3 — Speedometer
4 — Turn signal/hazard indicator
5 — High beam indicator
6 — Tachometer
7 — Odometer
8 — Trip odometer reset button
9 — Boost gauge
10 — Oil pressure gauge
11 — CHECK FUEL CAP indicator
12 — BRAKE warning indicator Klj . 3 ba
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z
air bag warning indicator
z BRAKE warning indicator
z charging system indicator
z fail safe cooling warning indicator
z low coolant level indicator
z low fuel warning indicator
z traction control indicator
Instrument Cluster Replacement
When it is necessary to install a new instrument cluster, contact the Instrument Cluster Program.
Gauge Indication Systems
Tachometer
Engine rpm information is relayed to the instrument cluster from the powertrain control module (PCM)
over the standard corporate protocol (SCP) network.
Speedometer
The instrument cluster receives the vehicle speed signal from the PCM over the SCP network and
displays it on the speedometer gauge. If the instrument cluster receives no vehicle speed signal after
one second, the speedometer defaults to 0.0 km/h (0.0 mph).
Odometer
The instrument cluster receives an odometer message from the PCM and stores the mileage in
memory. When the instrument cluster fails to receive the odometer message for more than two
seconds, the odometer will display dashes.
Fuel Gauge
The fuel sender is hardwired to the fuel gauge. When the instrument cluster fails to receive the fuel
level signal for more than 33 seconds, the fuel level gauge will move below E (empty). If the fuel level
signal operates correctly for more than 33 seconds, the fuel gauge will return to the correct position.
Fuel fills of less than 9.5 liters (2.5 gallons) require at least 10 minutes to update the fuel gauge
indication.
Engine Coolant Temperature Gauge
Engine coolant temperature information is received by the instrument cluster from the PCM over the
SCP network. Engine coolant temperatures above 121°C (250°F) will cause the gauge to indicate
above the normal band. If the engine coolant temperature information is missing or invalid for five
seconds, the temperature gauge will indicate below the cold (C) position.
Voltage Gauge (except Cobra)
The voltage gauge displays the system voltage as measured at the instrument cluster run input. Boost Gauge (Cobra only) Klj . 2 ba
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The boost pressure gauge on the instrument cluster receives and measures the boost pressure
directly from the intake manifold. The boost pressure gauge will display between 0.0-
0.48 kpa (0.0-10
psi) boost pressure dependent upon accelerator position, engine load, and engine rpm.
LOW FUEL Level Indicator
The low fuel level indicator is hardwired from the fuel sender to the instrument cluster. The instrument
cluster will illuminate the low fuel indicator when the usable fuel quantity is less than 1/8 tank (15%) of
fuel tank capacity.
Oil Pressure Gauge
The oil pressure gauge is hardwired from the oil pressure switch to the instrument cluster. The oil
pressure gauge will indicate either normal or no oil pressure.
CHECK FUEL CAP
The CHECK FUEL CAP indicator is used to indicate significant leaks in the fuel tank evaporative
system due to a loose fuel cap. Fuel tank pressure is monitored by the PCM. If a leak is detected the
PCM signals a fault to the instrument cluster via the SCP network. Once the PCM has detected a
loose fuel cap and the CHECK FUEL CAP indicator is illuminated, the indicator will remain illuminated
until the fuel cap is secured and the vehicle has been running for several minutes. For additional
information, refer to the Powertrain Control/Emissions Diagnosis (PC/ED) manual.
BRAKE Warning Indicator
The BRAKE warning indicator activates when the generic electronic module (GEM) detects the ignition
switch circuits are in the RUN state, when the GEM detects low brake fluid level, or that the parking
brake is applied. The BRAKE warning indicator will prove out starting when the GEM detects that the
ignition circuits have made a transition to RUN or START from OFF, ACC, or keyout and ending when
either three seconds have elapsed or when the GEM detects the ignition circuits have made a
transition to OFF, ACC, or keyout.
Safety Belt Warning Indicator
The safety belt switch is hardwired to the GEM. The safety belt warning indicator will be illuminated
when the GEM sends a ground signal to the instrument cluster.
ABS Warning Indicator
The ABS warning indicator will be illuminated when the anti- lock brake control module sends a ground
signal to the instrument cluster. The prove- out of the ABS indicator is controlled by the anti- lock brake
control module.
SERVICE ENGINE SOON Indicator
The SERVICE ENGINE SOON indicator receives its signal from the PCM over the SCP network. If the
instrument cluster does not receive a message from the PCM within five seconds, the instrument
cluster will illuminate the SERVICE ENGINE SOON indicator and log a diagnostic trouble code (DTC).
High Beam Indicator
The high beam indicator will illuminate when the steering column multifunction switch is in the high
beam position by sending a battery signal to the instrument cluster. Right and Left Turn Indicator Klj . 3 ba
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The right and left turn indicators will illuminate when the steering column multifunction switch is in
either turn signal position or hazard lamps position by sending a battery signal to the instrument
cluster.
AIR BAG Warning Indicator
The AIR BAG warning indicator will be illuminated when the restraint control module (RCM) sends a
ground signal to the instrument cluster. The prove-
out of the AIR BAG warning indicator is controlled
by the RCM.
THEFT Indicator
The THEFT indicator provides a passive anti- theft system (PATS) prove-out. The THEFT indicator will
prove out for three seconds following the ignition switch cycle and will flash following an ignition switch
OFF transition to indicate that PATS is active.
Charging System Indicator
The charging system indicator will be illuminated when the generator provides a ground signal to the
instrument cluster. The instrument cluster provides a prove- out when the ignition switch is in the RUN
position with the engine off. When the engine is started, the generator removes the ground to the
instrument cluster and extinguishes the charging system indicator.
Overdrive Off (O/D OFF) Indicator
The O/D OFF indicator is controlled by the off/on message sent from the PCM over the SCP network.
The instrument cluster does not provide a prove- out for the O/D OFF indicator, but will remain
illuminated if the overdrive has been commanded off following the instrument cluster prove- out.
Traction Control Indicator
During initialization, the instrument cluster will receive the traction control system state status message
from the traction control module to determine if the vehicle is equipped with traction control. If the
vehicle is equipped with traction control, this information will be stored in random access memory
(RAM) and the indicator will prove out for three seconds during each ignition cycle. If this message is
not received, the instrument cluster will assume that the vehicle is not traction control equipped and
the indicator will remain off. When the traction control is active, the traction control module sends the
instrument cluster a traction control active signal and the instrument cluster illuminates the traction
control indicator. When the traction control is inactive, the traction control module removes the traction
control active signal and the instrument cluster turns off the indicator.
In the event of a traction control failure, the traction control indicator will remain off and the ABS
indicator will illuminate.
Inspection and Verification 1. Verify the customer concern.
2. Visually inspect for obvious signs of mechanical and electrical damage.
Visual Inspection Chart Mechanical Electrical
z
Fuel tank z
Central junction box (CJB) fuse(s): Klj . 4 ba
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PINPOINT TEST T: THE TURN/HAZARD INDICATOR IS
NEVER/ALWAYS ON CLUSTER SERVICE ENGINE SOON
INDICATOR ACTIVE COMMAND
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 MIL.
z Did the SERVICE ENGINE SOON
indicator illuminate? Yes
REFER to the Powertrain Control/Emissions
Diagnosis (PC/ED) manual.
No
GO to
S2 .
S2 CHECK FOR CORRECT
INSTRUMENT CLUSTER OPERATION z
Disconnect all instrument cluster
connectors.
z Check for:
zcorrosion
z pushed- out pins
z Connect all instrument cluster
connectors and make sure they seat
correctly.
z Operate the system and verify the
concern is still present.
z Is the concern still present? Yes
INSTALL a new instrument cluster. REFER to
Instrument Cluster
in this section. TEST the
system for 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 T1 CHECK THE TURN SIGNAL AND HAZARD LAMPS OPERATION
CAUTION: Use the correct probe adapter(s) when making
measurements. Failure to use the correct probe adapter(s) may
damage the connector.
z Key in ON position.
z Operate the left and right turn signals.
z Operate the hazard lamps.
z Do the turn signals and hazard lamps operate correctly? Yes
GO to
T2 .
No
REFER to Section 417 - 01 .
T2 CHECK THE CIRCUIT IN QUESTION —
CIRCUIT 2 (WH/LB) (RH)
OR CIRCUIT 3 (LG/WH) (LH) z
Key in OFF position.
z Disconnect: Instrument Cluster C220a (RH) or C220b (LH).
z Key in ON position.
z Measure the voltage between the instrument cluster C220a pin 3,
circuit 3 (LG/WH), harness side and ground, while the steering
column multifunction switch is placed in the left turn position (LH); or
between the instrument cluster C220b pin 3, circuit 2 (WH/LB),
harness side and ground, while the steering column multifunction
switch is placed in the right turn position (RH). Yes
GO to
T3 .
No
REPAIR the circuit
(s) in question.
TEST the system for
normal operation. Klj . 36 ba
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PINPOINT TEST U: THE TRACTION CONTROL INDICATOR IS
NEVER/ALWAYS ON z
Does the voltage alternate between 0 volts and 10 volts with
the turn signal on? T3 CHECK FOR CORRECT INSTRUMENT CLUSTER OPERATION
z
Disconnect all instrument cluster connectors.
z Check for:
zcorrosion
z pushed- out pins
z Connect all instrument cluster connectors and make sure they seat
correctly.
z Operate the system and verify the concern is still present.
z Is the concern still present? Yes
INSTALL a new
instrument cluster.
REFER to
Instrument Cluster
in this section.
TEST the system for
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
U1 DETERMINE IF THE TRACTION
CONTROL INDICATOR IS ALWAYS ON z
Observe the traction control indicator.
z Is the indicator always on? Yes
REFER to
Section 206 - 09B .
No Klj . 37 ba
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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
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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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for normal
operation.
D8 CHECK FOR POWER TO THE AFFECTED SUBWOOFER
AMPLIFIER z
Key in OFF position.
z Disconnect: Mach 1000 Affected Subwoofer Amplifier.
z Measure the voltage between affected subwoofer amplifier pin 5,
circuit 828 (VT/LB) (left amplifiers) and ground, or between pin 5,
circuit 829 (WH/VT) (right amplifiers) and ground.
z Is the voltage greater than 10 volts? Yes
GO to
D9 .
No
REPAIR the circuit
(s) in question.
TEST the system
for normal
operation. D9 CHECK FOR GROUND TO THE AFFECTED SUBWOOFER
AMPLIFIER z
NOTE: Ground circuit 694 is located in the same cavity in all four
subwoofer amplifiers.
z Measure the resistance between affected subwoofer amplifier pin 2,
circuit 694 (BK/LG) and ground.
z Is the resistance less than 5 ohms? Yes
GO to
D10 .
No
REPAIR the circuit
(s) in question.
TEST the system
for normal
operation. D10 CHECK FOR AN AUDIO SIGNAL TO THE AFFECTED
SUBWOOFER AMPLIFIER z
Key in ON position.
z NOTE: Audio signal circuits 169 and 172 are located in the same
cavity on all four subwoofer amplifiers.
z Turn on the audio unit and check for a fluctuating AC voltage
between affected subwoofer amplifier pin 8, circuit 172 (LB/RD) and
pin 7, circuit 169 (LG/BK). Yes
GO to
D12 .
No
GO to D11 . Klj . 10 ba
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z
Does the voltage vary as the volume is adjusted? D11 CHECK AUDIO SIGNAL CIRCUITS AT THE AFFECTED
SUBWOOFER AMPLIFIER FOR OPEN AND SHORT TO GROUND z
Key in OFF position.
z Disconnect: Audio Unit C290a.
z Measure the resistance between the affected subwoofer amplifier
and the audio unit C290a, and between the affected subwoofer
amplifier and ground as follows:
z Is the resistance less than 5 ohms between the audio unit and
subwoofer amplifier and greater that 10,000 ohms between the
subwoofer amplifier and ground? Speaker Circuits Audio Unit C290a Pin Subwoofer Amplifier Pin Circuit
2 8 172 (LB/RD)
8 7 169 (LG/BK) Yes
SEND the audio
unit to an
authorized Ford
audio system
repair facility.
TEST the system
for normal
operation.
No
REPAIR the circuit
(s) in question.
TEST the system
for normal
operation.
D12 CHECK FOR AN AUDIO SIGNAL AT THE AFFECTED
SUBWOOFER z
Key in OFF position.
z Connect: Affected Subwoofer Amplifier.
z Disconnect: Affected Subwoofer Speaker .
z Key in ON position.
z Turn on the audio unit and check for a fluctuating AC voltage
between affected subwoofer as follows: For right subwoofer pin 4,
circuit 187 (DB/OG) and pin 2, circuit 189 (LG/BK) harness side; and
between pin 3, circuit 179 (OR/RD) and pin 1, circuit 176 (PK/LG)
harness side. For left subwoofer pin 1, circuit 187 (DB/OR) and pin 3,
circuit 189 (LG/BK) harness side; and between pin 2, circuit 179
(OR/RD) and pin 4, circuit 176 (PK/LG) harness side.
z Does the voltage vary as the volume is adjusted? Yes
INSTALL a new
subwoofer
speaker.
No
GO to
D13 .
D13 CHECK FOR AN OPEN AND SHORT TO GROUND BETWEEN THE
AFFECTED SUBWOOFER AND ITS RESPECTIVE AMPLIFIERS z
Key in OFF position. Yes Klj . 11 ba
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