2003 FORD MUSTANG door lock

REMOVAL AND INSTALLATION
Switch —
Door Ajar Switch
Removal 1. Remove the door trim panel (23942). For additional information, refer to Section 501 - 05 .
2. Remove the door latch (21812). For additional information, refer to Latch — Door .
3. Remove the door ajar switch. zRelease the locking tab.
Installation 1. To install, reverse the removal procedure.
SECTION 501-
14A: Handles, Locks, Latches and Mechanisms 2003 Mustang Workshop Manual Klj . 1 ba
12003 Mustang Workshop Manual
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REMOVAL AND INSTALLATION
Switch —
Door Lock
Removal
1. CAUTION: Place a rag between the window regulator switch plate and the door trim
panel to avoid damaging the door trim panel.
Position the window regulator switch plate (14524) aside. 1. Pull at service notch.
2. Lift to release the clip at the rear edge.
2. Remove the screws and the door lock switch (14017).
Installation 1. To install, reverse the removal procedure.
SECTION 501-
14A: Handles, Locks, Latches and Mechanisms 2003 Mustang Workshop Manual Klj . 1 ba
22003 Mustang Workshop Manual
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DESCRIPTION AND OPERATION
Keyless Entry
The electronic door lock system has two main components:
zgeneric electronic module (GEM)(14B204)
z keyless entry remote transmitter (15K601)
SECTION 501-
14B: Keyless Entry/Computer Operated Locks 2003 Mustang Workshop Manual Klj . 1 ba
12003 Mustang Workshop Manual
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DIAGNOSIS AND TESTING
Keyless Entry
Refer to Wiring Diagrams Cell
59 , Generic Electronic Module for schematic and connector
information.
Refer to Wiring Diagrams Cell 111 , Remote Keyless Entry (RKE) for schematic and connector
information.
Principles of Operation
NOTE: Battery power and ground must be remove before disconnecting the GEM connectors to avoid
setting false codes.
Power Locks Operation
The power locks feature allows the customer to lock and unlock the doors via momentary switches
located on the driver and passenger door. When the GEM detects a momentary press of the driver or
passenger lock button, the GEM will supply power to the driver or passenger lock actuators for
approximately 250 ms from relays internal to the GEM. When the GEM detects a momentary press of
the driver or passenger unlock button, the GEM will supply power to the driver or passenger unlock
actuators for approximately 250 ms from relays internal to the GEM.
Remote Keyless Entry Door Locks Operation
The remote entry feature allows the customer to unlock the driver door, unlock all doors, and lock all
doors using a valid remote transmitter as long as the ignition switch is not in RUN or START. The
driver door is unlocked whenever the GEM detects a valid remote transmitter unlock transmission. All
the doors are unlocked when the GEM detects a second valid remote transmitter unlock transmission
within three seconds of the first transmission. All the doors are locked when the GEM detects a valid
remote transmitter lock transmission. If the GEM detects a second valid remote transmitter lock
transmission within three seconds of the first transmission, the doors will lock again, the horn will
sound for 20 ms and the parking lamps will flash for 200 ms to indicate the doors are locked. If the
GEM detects the driver or passenger door is ajar during the second lock transmission, the doors are
locked again and the horn is sounded twice. If the GEM detects a valid remote transmitter lock
transmission within three seconds of detecting a valid remote transmitter unlock transmission, the SECTION 501-
14B: Keyless Entry/Computer Operated Locks 2003 Mustang Workshop Manual Special Tool(s)
73 Digital Multimeter or
equivalent
105-
R0051 Worldwide Diagnostic System
(WDS)
418-
F224
New Generation STAR (NGS)
Tester
418- F052, or equivalent scan
tool Klj . 1 ba
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GEM will lock all the doors.
Remote Keyless Entry Luggage Compartment Operation
The luggage compartment lid is released whenever the GEM detects a valid remote transmitter
luggage compartment release transmission.
Panic Alarm Operation
The panic alarm feature allows the vehicle to initiate an alarm for 2.75 minutes to identify itself using a
valid remote transmitter. The panic alarm is activated whenever the GEM detects the ignition switch is
in the OFF position or if the key is removed from the ignition, and the GEM detects a valid PANIC
response from the remote transmitter. When the panic alarm is activated, the GEM:
zilluminates the courtesy lamps.
z flashes the parking lamps.
z toggles the horn on and off.
The panic alarm is deactivated whenever GEM detects:
zif the key causes a transition of the ignition switch circuits to
„ACC.
„ RUN.
„ START.
z the remote transmitter
„panic button.
„ unlock button.
The panic alarm is also deactivated after 2.75 minutes have gone by.
Remote Transmitter Programming Operation
This feature allows the customer to program up to four different transmitter identification codes (TIC)
for four remote transmitters to the vehicle at any time. For additional information, refer to
Programming — Keyless Entry Remote Transmitter .
Inspection and Verification 1. The keyless entry system is a generic electronic module (GEM).
2. Verify the customer concern by using the remote transmitters to operate the keyless entry system.
3. Visually inspect for the following obvious signs of mechanical and electrical damage.
Visual Inspection Chart Klj . 2 ba
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Short to Ground
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 DTC. 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 GO to
Pinpoint Test B .
B1397 Power Door Unlock Circuit
Short to Battery GEM GO to
Pinpoint Test B .
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 .
B1833 Door Unlock Disarm Switch
Circuit Short to Ground GEM REFER to
Section 419 - 01 .
B1498 Decklid Punch-Out Sensor
Ground Short. GEM GO to
Pinpoint Test D .
B1603 Lamp Anti-
Theft Indicator
Circuit Failure GEM REFER to
Section 413 - 01 .
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 . Klj . 4 ba
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Symptom Chart 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 GO to
Pinpoint Test D .
B1553 Decklid Release Circuit Short
to Battery GEM GO to
Pinpoint Test D .
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 Output
Circuit Failure GEM REFER to
Section 417 - 01 .
B1605 Lamp Anti-
Theft Indicator
Circuit Short to Battery GEM REFER to
Section 501 - 16 .
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
Circuitry.
z CJB Fuse 39 (5A).
z GEM. z
GO to
Pinpoint Test A .
z All door locks are inoperative zCJB Fuse 19 (15A).
z BJB Fuse POWER
WINDOWS (40A).
z Circuitry.
z GEM.
z Switches.
z Lock actuators. z
GO to
Pinpoint Test B .
z The doors do not lock/unlock
using the remote transmitter z
Ignition switch.
z GEM. z
GO to
Pinpoint Klj . 5 ba
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Pinpoint Tests
PINPOINT TEST A: NO COMMUNICATION WITH THE GENERIC
ELECTRONIC MODULE z
Remote transmitter.
z Remote transmitter
batteries. Test C .
z The luggage compartment door
is inoperative using the remote
transmitter z
CJB Fuse 25 (25A).
z Remote transmitter
batteries.
z Remote transmitter.
z GEM.
z Circuitry.
z Luggage
compartment lid
release relay. z
GO to
Pinpoint Test D .
z Panic function does not operate
correctly z
GEM.
z Driver door unlock
relay.
z Circuitry.
z Remote transmitter
and batteries.
z Courtesy lamps.
z Horn relay.
z Horn.
z Parklamps. z
GO to
Pinpoint Test E .
Test Step Result / Action to Take
CAUTION: Use the correct probe adapter(s) when making measurements. Failure to
use the correct probe adapter(s) may damage the connector. A1 CHECK THE GENERIC ELECTRONIC MODULE (GEM)
POWER SUPPLY z
Key in OFF position.
z Disconnect: Generic Electronic Module (GEM) C201a.
z Disconnect: GEM C201b.
z Key in ON position.
z Using the following table, measure the voltage between the
GEM, harness side and ground.
z Are the voltages greater than 10 volts? Connector Pin Circuit
C201a 4 400 (LB/BK)
C201a 1 1006 (DG/WH)
C201b 2 1001 (WH/YE)
C201b 3 193 (YE/LG) Yes
GO to
A2 .
No
REPAIR the circuit(s) in
question. TEST the system
for normal operation. A2 CHECK THE GEM GROUND CIRCUIT 397 (BK/WH) FOR
OPEN z
Key in OFF position. Yes Klj . 6 ba
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