2003 FORD MUSTANG lock

DIAGNOSIS AND TESTING
Instrument Cluster
Refer to Wiring Diagrams Cell
60 , Instrument Cluster for schematic and connector information.
Principles of Operation
NOTE: A new instrument cluster must be reconfigured. Refer to Section 418 - 01 .
The instrument cluster is a hybrid electronic cluster (HEC). The instrument cluster uses both hardwired
and the standard corporate protocol (SCP) communication network to transmit and receive
information. As a technician it is very important to understand:
zwhere the input originates from.
z all information necessary in order for a feature to operate.
z which module(s) receive(s) the input or command message.
z does the module which received the input control the output of the feature, or does it output a
message over the SCP network to another module?
z which module controls the output of the feature.
The instrument cluster carries out a display prove- out to verify that the warning/indicator miniature
bulbs for monitored systems are functioning correctly. When the ignition switch is in the ON position
with the engine off, the following warning indicators will prove out:
zanti- lock brake (ABS) warning indicator
SECTION 413-
01: Instrument Cluster 2003 Mustang Workshop Manual Special Tool(s)
Worldwide Diagnostic System
(WDS)
418-
F224,
New Generation STAR (NGS)
Tester
418- F052, or equivalent
diagnostic tool Instrument Gauge System
Tester
014-
R1063 or equivalent 73III Automotive Meter
105-
R0057 or equivalent Klj . 1 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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GEM Diagnostic Trouble Code (DTC) Index
DTC Description Source Action
B1218 Horn Relay Coil Circuit Short to
VBatt GEM REFER to
Section 501 - 14B .
B1312 Lamp Headlamp Input Circuit
Short to Battery GEM REFER to
Section 413 - 09 .
B1317 Battery Voltage High GEM REFER to
Section 414 - 00 .
B1318 Battery Voltage Low GEM REFER to
Section 414 - 00 .
B1322 Driver Door Ajar Circuit Short to
Ground GEM REFER to
Section 417 - 02 .
B1330 Passenger Door Ajar Circuit
Short to Ground GEM REFER to
Section 417 - 02 .
B1334 Decklid Ajar Rear Door Circuit
Short to Ground GEM REFER to
Section 417 - 02 .
B1339 Chime Input Request Circuit
Short to Battery GEM REFER to
Section 413 - 09 .
B1340 Chime Input Request Circuit
Short to Ground GEM REFER to
Section 413 - 09 .
B1342 ECU is Defective GEM Clear the DTCs. Retrieve the DTCs. If DTC B1342
is retrieved, INSTALL a new GEM. REFER to Section 419 - 10 .
B1353 Ignition Key-
In Circuit Open GEM REFER to
Section 413 - 09 .
B1359 Ignition Run/Acc Circuit Failure GEM REFER to
Section 211 - 05 .
B1396 Power Door Lock Circuit Short
to Battery GEM REFER to
Section 501 - 14B .
B1397 Power Door Unlock Circuit
Short to Battery GEM REFER to
Section 501 - 14B .
B1405 Driver Power Window Down
Circuit Short to Battery GEM REFER to
Section 501 - 11 .
B1408 Driver Power Window Up
Circuit Short to Battery GEM REFER to
Section 501 - 11 .
B1426 Lamp Safety Belt Circuit Short
to Battery GEM Go To Pinpoint Test K .
B1428 Lamp Safety Belt Circuit Failure GEM Go To Pinpoint Test K .
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 . Klj . 8 ba
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z
Powertrain
control module
(PCM). manual.
z The CHECK FUEL CAP
INDICATOR is never on z
Circuitry.
z Standard
corporate
protocol (SCP)
network.
z Powertrain
control module
(PCM). z
Go To Pinpoint Test N .
z The CHECK FUEL CAP
INDICATOR is always
on z
Circuitry.
z Powertrain
control module
(PCM).
z Fuel system. z
REFER to the Powertrain
Control/Emissions
Diagnosis (PC/ED)
manual.
z The BRAKE warning
indicator is never/always
on z
Circuitry.
z Low brake fluid
level.
z Brake fluid
level switch.
z Parking brake
switch.
z Instrument
cluster.
z Generic
electronic
module (GEM). z
Go To Pinpoint Test O .
z The charging system
warning indicator is
never/always on z
Circuitry.
z Generator.
z Charging
system warning
indicator bulb.
z Instrument
cluster. z
Go To Pinpoint Test P .
z The high beam indicator
is never/always on z
Circuitry.
z High beam
indicator bulb.
z Instrument
cluster. z
Go To Pinpoint Test Q .
z The air bag warning
indicator is never/always
on z
Circuitry.
z Air bag warning
indicator bulb.
z Instrument
cluster.
z Restraint
control module
(RCM). z
REFER to Section 501 -
20B .
z The anti- lock brake
system (ABS) warning
indicator is never on z
Circuitry.
z ABS warning
indicator bulb.
z Anti- lock brake
control module.
z Instrument
cluster. z
Go To Pinpoint Test R .
z The ABS warning
indicator is always on z
Circuitry.
z Anti- lock brake
control module. z
REFER to Section 206 -
09A or
Section 206 - 09B . Klj . 12 ba
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PINPOINT TEST R: THE ABS WARNING INDICATOR IS NEVER ON z
Key in OFF position.
z Disconnect: Instrument Cluster C220b.
z Key in ON position.
z Measure the voltage between the instrument cluster C220b
pin 2, circuit 12 (LG/BK), harness side and ground, while
turning the high beams on and off.
z Is the voltage 0 volts with the high beams off and
greater than 10 volts with the high beams on? Yes
GO to
Q3 .
No
REPAIR the circuit. TEST
the system for normal
operation. Q3 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
R1 CHECK THE ABS WARNING INDICATOR 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 Observe the ABS warning indicator. The ABS indicator
should prove out for approximately six seconds then turn off.
z Does the ABS warning indicator operate correctly? Yes
The system is operating
normally at this time.
No
If the indicator is
inoperative, GO to
R2 .
If the indicator is always
on, REFER to Section 206 -
09A or
Section 206 - 09B .
R2 CHECK THE INSTRUMENT CLUSTER INPUT
z
Key in OFF position.
z Disconnect: Anti- Lock Brake Control Module C135.
z Connect a fused (10A) jumper wire between the anti- lock
brake control module C135 pin 16, circuit 603 (DG), harness Yes
REFER to
Section 206 - 09A
or
Section 206 - 09B . Klj . 34 ba
412003 Mustang Workshop Manual
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PINPOINT TEST S: THE SERVICE ENGINE SOON INDICATOR IS
NEVER/ALWAYS ON side and ground.
z Key in ON position.
z Does the ABS indicator illuminate? No
GO to
R3 .
R3 CHECK CIRCUIT 603 (DG) FOR AN OPEN
z
Key in OFF position.
z Disconnect: Instrument Cluster C220b.
z Measure the resistance between the instrument cluster
C220b pin 15, circuit 603 (DG), harness side and the anti-
lock brake control module C135 pin 16, circuit 603 (DG),
harness side.
z Is the resistance less than 5 ohms? Yes
GO to
R4 .
No
REPAIR the circuit. TEST
the system for normal
operation. R4 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
S1 CARRY OUT THE INSTRUMENT Klj . 35 ba
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REMOVAL AND INSTALLATION
Warning Indicator Bulb
Removal and Installation
1. Remove the instrument cluster. Refer to Instrument Cluster in this section.
2. Remove the necessary instrument cluster bulbs by rotating one quarter turn counterclockwise.
3. To install, reverse the removal procedure.
SECTION 413-
01: Instrument Cluster 2003 Mustang Workshop Manual Klj . 1 ba
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REMOVAL AND INSTALLATION
Switch —
Key-In-Ignition Warning
Removal 1. Remove the ignition switch lock cylinder. 1. Insert the ignition key and turn to the RUN position.
2. Insert a punch in the access hole of the steering column and press the release tab while pulling out the ignition switch lock cylinder.
2. Remove the key- in-ignition warning switch.
1. Release the clip.
2. Push the key- in-ignition warning switch off the rear of the ignition switch lock cylinder.
Installation 1. To install, reverse the removal procedure. zVerify ignition switch lock cylinder operation.
SECTION 413-
09: Warning Devices 2003 Mustang Workshop Manual Klj . 1 ba
22003 Mustang Workshop Manual
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