2003 FORD MUSTANG warning

REMOVAL AND INSTALLATION
Bulb —
Headlamp
Removal
WARNING: The halogen bulb contains gas under pressure. The bulb may shatter if the
glass envelope is scratched or if the bulb is dropped. Handle the bulb only by its base. Grasp
the bulb only by its base. Avoid touching the glass envelope.
NOTE: The headlamp bulb should not be removed from the headlamp until just before a replacement
bulb is installed. Removing the bulb for an extended period of time may effect headlamp bulb
performance. Contaminants may enter the headlamp where they can settle on the lens and reflector.
Never turn on the headlamps with the bulb removed.
1. Remove the headlamp assembly. For additional information, refer to Lamp Assembly —
Headlamp .
2. Rotate the headlamp bulb retainer counterclockwise.
3. Remove the headlamp bulb and retainer. zGrasp the headlamp bulb by its base and remove the bulb.
Installation 1. WARNING: The halogen bulb contains gas under pressure. The bulb may shatter if
the glass envelope is scratched or if the bulb is dropped. Handle the bulb only by its
base. Grasp the bulb only by its base. Avoid touching the glass envelope.
To install, reverse the removal procedure.
SECTION 417-
01: Exterior Lighting 2003 Mustang Workshop Manual Klj . 1 ba
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Symptom Chart
Pinpoint Tests
CAUTION: Before removing and installing the GEM or its connectors, disconnect the Output Circuit Failure
B2488 RF Side Repeater Lamp
Output Circuit Failure GEM REFER to
Section 417 - 01 .
C1189 Brake Fluid Level Sensor
Input Short Circuit to Ground GEM REFER to
Section 413 - 01 .
C1223 Lamp Brake Warning
Output Circuit Failure GEM REFER to
Section 413 - 01 .
C1225 Lamp Brake Warning
Output Circuit Short to
Battery GEM REFER to
Section 413 - 01 .
Symptom Chart Condition
Possible Sources Action
z No communication with the generic
electronic module z
CJB Fuse 39
(5A)
z GEM.
z Circuitry. z
GO to
Pinpoint Test A .
z The courtesy lamps are inoperative zCJB Fuse 7
(20A).
z Door ajar switch
(es).
z Courtesy lamp
assemblies.
z Circuitry.
z GEM.
z Ignition Switch.
z Headlamp
Switch. z
GO to
Pinpoint Test B .
z The demand lighting is inoperative zCJB Fuse 7
(20A).
z Circuitry.
z GEM.
z Door ajar switch
(es).
z Demand lamp
assemblies.
z Ignition Switch.
z Headlamp
Switch. z
GO to
Pinpoint Test C .
z The illuminated entry is inoperative
when using the remote transmitter z
Remote
transmitter.
z GEM. z
GO to
Pinpoint Test D .
z The battery saver does not
deactivate after timeout z
Circuitry.
z GEM. z
GO to
Pinpoint Test E . Klj . 5 ba
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The generic electronic module (GEM) is on the ISO 9141 network. The GEM module controls a variety
of systems including one touch down windows, wipers, perimeter anti-
theft, and warning chimes. For
additional information, refer to Section 419 - 10 .
The anti- lock brake control module communicates over the ISO 9141 communication network when
not equipped with traction control and communicates over the SCP communication network when it is
equipped with the traction control option. The anti- lock brake control module controls the brake
pressure to the four wheels to keep the vehicle under control while braking. For additional information
on anti- lock brake control module without traction control, refer to Section 206 - 09A . For additional
information on anti- lock brake control module with traction control, refer to Section 206 - 09B .
The instrument cluster is on the SCP communication network. The instrument cluster displays driver
information. The instrument cluster incorporates the PATS control module functions. For additional
information on the PATS system, refer to Section 419 - 01 . For additional information on the instrument
cluster, refer to Section 413 - 01 .
Inspection and Verification 1. Verify the customer concern.
2. Visually inspect for obvious signs of electrical damage.
3. If the concern remains after the inspection, connect diagnostic tool to the data link connector (DLC) located beneath the instrument panel and select the vehicle to be tested from diagnostic
tool menu. If diagnostic tool does not communicate with the vehicle:
zcheck that the program card is correctly installed.
z check that the correct version of the program card is installed.
z check the connections to the vehicle.
z check the ignition switch position.
If the diagnostic tool still does not communicate with the vehicle, go to Pinpoint Test H. 4. Go to Pinpoint Test PC.
System Precheck Visual Inspection Chart Electrical
z
Central junction box (CJB) Fuse 31 (5A)
z Damaged wiring harness
z Loose or corroded connections
z Anti- lock brake control module without traction control (optional)
z Anti- lock brake control module with traction control (optional)
z Generic electronic module (GEM)
z Restraint control module (RCM)
z Powertrain control module (PCM)
z Instrument cluster Klj . 2 ba
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Programmable Parameters Index
System Programmable Parameter Items
Warnings & Chimes Belt Minder Klj . 3 ba
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PINPOINT TEST C: THE ANTI-
THEFT SYSTEM DOES NOT OPERATE
CORRECTLY — THE VEHICLE STARTS BUT FLASHES A FAULT
CODE ON THE THEFT INDICATOR AT KEY ON z
Key in OFF position.
z Connect the diagnostic tool.
z Enter the instrument cluster active command mode.
z Can the instrument cluster active command
mode be entered? Yes
GO to
B2 .
No
Go To Pinpoint Test A .
B2 TRIGGER THE ANTI-
THEFT INDICATOR z
Trigger the instrument cluster active command
WARNING LAMPS AND CHIME to ON.
z Does the anti- theft indicator illuminate? Yes
The anti-
theft indicator is OK.
VERIFY the concern with the
customer.
No
GO to B3 .
B3 CHECK THE ANTI-
THEFT INDICATOR z
Key in OFF position.
z Disconnect: Anti- Theft LED.
z Measure the resistance between the pins of the
anti- theft LED in both directions.
z Is the resistance greater than 10,000 ohms in
one direction, and 10- 20 ohms in the other
direction? Yes
INSTALL a new instrument cluster;
for additional information, REFER to
Section 413
- 01 . CYCLE the ignition
to RUN using two encoded ignition
keys. Go To Pinpoint Test J to
initialize the module. REPEAT the
self- test. CLEAR the DTCs.
No
INSTALL a new anti- theft LED. For
additional information, REFER to
Section 413 - 01 . REPEAT the self-
test. CLEAR the DTCs. Test Step Result / Action to Take
C1 CHECK THE ANTI-
THEFT INDICATOR FOR
CORRECT OPERATION z
Key in START position.
z Verify the theft indicator
proves out correctly.
z Does the vehicle start
once the theft proves
out? Yes
If the vehicle starts, VERIFY correct PCM calibration for vehicle.
REFER to Powertrain Control/Emissions Diagnosis (PC/ED)
manual Section 3.
No
GO to
C2 .
C2 CHECK THE PCM
DIAGNOSTIC CAPABILITY z
Connect the diagnostic
tool.
z Retrieve and document
continuous DTCs.
z Enter the following Yes
GO to
C3 .
No
REFER to Section 418 - 00 . Klj . 6 ba
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DESCRIPTION AND OPERATION
Module Controlled Functions
The generic electronic module (GEM)(14B205) is the only multifunction control module on this vehicle.
The GEM controls the following functions:
zwarning chimes and warning lamps
z one- touch down window
z windshield washers and wipers
z battery saver
z illuminated entry with keyless remote entry
z interior lighting
SECTION 419-
10: Multifunction Electronic Control Modules 2003 Mustang Workshop Manual Klj . 1 ba
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DIAGNOSIS AND TESTING
Multifunction Electronic Module
For warning chime concerns, refer to
Section 413 - 09 .
For courtesy lamps/illuminated entry and battery saver concerns, refer to Section 417 - 02 .
For one- touch window concerns, refer to Section 501 - 11 .
For wiper/washer control and interval timer concerns, refer to Section 501 - 16 .
For keyless entry and power door lock concerns, refer to Section 501 - 14B .
For anti- theft concerns, refer to Section 419 - 01 .
SECTION 419-
10: Multifunction Electronic Control Modules 2003 Mustang Workshop Manual Klj . 1 ba
12003 Mustang Workshop Manual
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B1450 Wiper Wash/delay Switch
Circuit Failure GEM GO to
Section 501 - 16 .
B1453 Wiper Wash/delay Switch
Circuit Short to Ground GEM GO to
Section 501 - 16 .
B1458 Wiper Washer Pump Motor
Relay Circuit Failure GEM GO to
Section 501 - 16 .
B1460 Wiper Washer Pump Motor
Relay Circuit Short to Battery GEM GO to
Section 501 - 16 .
B1462 Safety Belt Switch Circuit
Failure GEM GO to
Section 413 - 09 .
B1466 Wiper High/low Speed Not
Switching GEM GO to
Section 501 - 16 .
B1473 Wiper Low Speed Circuit
Motor Failure GEM GO to
Section 501 - 16 .
B1476 Wiper High Speed Circuit
Motor Failure GEM GO to
Section 501 - 16 .
B1498 Decklid Punch-
out Sensor
Ground Short GEM GO to
Section 419 - 01 .
B1551 Decklid Release Circuit
Failure GEM GO to
Section 501 - 14B .
B1553 Decklid Release Circuit Short
to Battery GEM GO to
Section 501 - 14B .
B1555 Ignition RUN/START Circuit
Failure GEM GO to
Section 211 - 05 .
B1603 Lamp Anti-
Theft Indicator
Circuit Failure GEM GO to
Section 419 - 01 .
B1605 Lamp Anti-
Theft Indicator
Circuit Short to Battery GEM GO to
Section 419 - 01 .
B1687 Lamp Dome Input Circuit
Short to Battery GEM GO to
Section 417 - 02 .
B1833 Door Unlock Disarm Switch
Circuit Short to Ground GEM GO to
Section 419 - 01 .
B2486 Parklamp Output Relay Driver
Circuit Failure GEM GO to
Section 419 - 01 .
B2488 Parklamp Output Relay Driver
Circuit Short to Battery GEM GO to
Section 419 - 01 .
C1189 Brake Fluid Level Sensor
Input Circuit Short to Ground GEM REFER to
Section 413 - 01 .
C1223 Lamp Brake Warning Output
Circuit Failure GEM REFER to
Section 413 - 01 .
C1225 Lamp Brake Warning Output
Circuit Short to Battery GEM REFER to
Section 413 - 01 .
ICM DIAGNOSTIC TROUBLE CODE (DTC) INDEX DTC Description Source Action
B1343 Heated Backlight Input Circuit Failure ICM GO to
Pinpoint Test H . Klj . 4 ba
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