AC system FORD MUSTANG 2003 Workshop Manual

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
18. 11. 2011file:///C:/Ford/2000 - 2004/tsocache/SHEF_5108/S3B~us~en~ ...

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
212003 Mustang Workshop Manual
18. 11. 2011file:///C:/Ford/2000 - 2004/tsocache/SHEF_5108/S3B~us~en~ ...

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
212003 Mustang Workshop Manual
18. 11. 2011file:///C:/Ford/2000 - 2004/tsocache/SHEF_5108/S3B~us~en~ ...

4. If the concern remains after the inspection, connect the scan tool to the data link connector
(DLC) located beneath the instrument panel and select the vehicle to be tested from the scan
tool menu. If the scan tool does not communicate with the vehicle:
zcheck that the program card is correctly installed.
z check the connections to the vehicle.
z check the ignition switch position.
5. If the scan tool still does not communicate with the vehicle, refer to the scan tool manual.
6. Carry out the DATA LINK DIAGNOSTIC TEST. If the scan tool responds with: zCKT914, CKT915 or CKT70 = ALL ECUS NO RESP/NOT EQUIP, refer to Section 418 -
00 .
z NO RESP/NOT EQUIP for GEM, go to Pinpoint Test A.
z SYSTEM PASSED, retrieve and record the continuous diagnostic trouble codes (DTCs),
erase the continuous DTCs, and carry out the self- test diagnostics for the GEM.
7. If the DTCs retrieved are related to the concern, go to the GEM Diagnostic Trouble Code (DTC) Index to continue diagnostics.
8. If no DTCs related to the concern are retrieved, proceed to Symptom Chart to continue diagnostics.
GEM Diagnostic Trouble Code (DTC) Index Mechanical Electrical
z
Binding latches z
CJB Fuses:
„39 (5A)
„ 19 (15A)
„ 25 (25A)
z BJB Fuse POWER WINDOWS (40A)
z Damaged wiring harness
z Loose or corroded connector(s)
z Circuitry open/shorted
z Damaged relays
z Remote transmitter
z Remote transmitter batteries DTC Description Source Action
B1217 Horn Relay Coil Circuit Failure GEM GO to
Pinpoint Test E .
B1218 Horn Relay Coil Circuit Short to
Vbatt GEM GO to
Pinpoint Test E .
B1312 Lamp Headlamp Input Circuit
Short to Battery GEM REFER to
Section 417 - 01 .
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 GEM REFER to
Section 417 - 02 . Klj . 3 ba
212003 Mustang Workshop Manual
18. 11. 2011file:///C:/Ford/2000 - 2004/tsocache/SHEF_5108/S3B~us~en~ ...

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
212003 Mustang Workshop Manual
18. 11. 2011file:///C:/Ford/2000 - 2004/tsocache/SHEF_5108/S3B~us~en~ ...

PINPOINT TEST B: ALL DOOR LOCKS ARE INOPERATIVE z
Measure the reistance between the GEM C201b pin 4, circuit
397 (BK/WH), harness side and ground.
z Is the reistance less than 5 ohms? GO to
A3 .
No
REPAIR the circuit(s) in
question. TEST the system
for normal operation. A3 CHECK CIRCUIT 397 (BK/WH) FOR SHORT TO POWER
z
Measure the voltage between the GEM C201b pin 4, circuit
397 (BK/WH), harness side and ground.
z Is any voltage present? Yes
REPAIR the circuit. TEST
the system for normal
operation.
No
REFER to
Section 418 - 00 .
Test Step Result / Action to
Take B1 CHECK POWER LOCK INPUTS TO THE GEM
z
Connect the diagnostic tool.
z Monitor the GEM PIDS DR_LOCK, DR_UNLK, PD_LOCK,
PD_UNLK, while depressing the driver and passenger power door
lock and unlock switches.
z Do the PID values agree with the switch positions? Yes
GO to
B11 .
No
GO to B2 .
B2 ISOLATE BETWEEN THE DRIVER AND PASSENGER POWER
DOOR LOCK SWITCHES NOTE:
This PID may not be supported in the normal scan tool PID
list. It can be located in the Function test —"Transmitter Tic/Data".
When this test is activated, the appropriate results may be obtained
when pressing the keyfob buttons.
z Connect the diagnostic tool.
z Monitor the GEM PIDS DR_LOCK and DR_UNLK, while
depressing the driver power door lock and unlock switches.
z Do the PID values agree with the switch positions? Yes
GO to
B7 .
No
GO to B3 .
B3 CHECK CIRCUIT 326 (WH/VT) FOR VOLTAGE —
DRIVER SIDE z
Disconnect: Master Window/Door Lock Control Switch C508.
z Measure the voltage between master window/door lock control
switch C508 Pin 3, Circuit 326 (WH/VT), harness side and ground. Yes
GO to
B4 .
No Klj . 7 ba
212003 Mustang Workshop Manual
18. 11. 2011file:///C:/Ford/2000 - 2004/tsocache/SHEF_5108/S3B~us~en~ ...

PINPOINT TEST D: THE LUGGAGE COMPARTMENT DOOR IS
INOPERATIVE USING THE REMOTE TRANSMITTER the normal scan tool PID list. It can be
located in the Function Test —
"
Transmitter Tic/DATA". When this test is
activated, the appropriate results may be
obtained when pressing the keyfob
buttons.
z Remove the ignition key from the ignition.
z Connect the diagnostic tool.
z Monitor the GEM FUNCTION TEST
TIC/DATA while pressing the lock and
unlock buttons on the remote transmitter.
z Does LAST DATA RECEIVED match
the button presses of the remote
transmitter? INSTALL a new GEM. For additional
information, REFER to
Section 419 - 10 .
REPEAT the self- test. CLEAR the DTCs.
No
GO to C4 .
C4 CHECK THE BATTERIES IN THE
REMOTE TRANSMITTER z
Install new batteries in the remote
transmitter.
z Connect the diagnostic tool.
z Monitor the GEM FUNCTION TEST
TIC/DATA while pressing the lock and
unlock buttons on the remote transmitter.
z Does LAST DATA RECEIVED match
the button presses of the remote
transmitter? Yes
SYSTEM is OK. REPEAT the self-test.
CLEAR the DTCs.
No
GO to
C5 .
C5 REPROGRAM THE REMOTE
TRANSMITTERS TO THE GEM z
NOTE: When carrying out the following
procedure it must be noted that all
previous programmed remote transmitters
will be erased. The customer needs to be
informed that any remote transmitters not
present during the programming mode will
not operate the vehicle. All remote
transmitters must be programmed at the
same time.
z Reprogram the remote transmitter to the
GEM. For additional information, refer to
Programming — Keyless Entry Remote
Transmitter .
z Connect the diagnostic tool.
z Monitor the GEM FUNCTION TEST
TIC/DATA while pressing the lock and
unlock buttons on the remote transmitter.
z Does LAST DATA RECEIVED match
the button presses of the remote
transmitter? Yes
SYSTEM is OK. REPEAT the self-test.
CLEAR the DTCs.
No
PROGRAM a new remote transmitter to the
vehicle. For additional information, REFER to
Programming
— Keyless Entry Remote
Transmitter . REPEAT the self-
test. CLEAR
the DTCs. If the problem still remains,
INSTALL a new GEM and program the remote
transmitters to the vehicle. For additional
information, REFER to Section 419 - 10 .
REPEAT the self- test. CLEAR the DTCs. Test Step Result / Action to Take
D1 CHECK IGNITION STATES
z
Connect the diagnostic tool.
z Monitor the GEM PIDS IGN_KEY, IGN_A, IGN_S, and
IGN_R while cycling the ignition switch through the OFF,
ACC, RUN, START and key out positions. Yes
GO to
D2 .
No Klj . 14 ba
212003 Mustang Workshop Manual
18. 11. 2011file:///C:/Ford/2000 - 2004/tsocache/SHEF_5108/S3B~us~en~ ...

z
Do the PID values agree with the ignition switch
positions? REFER to
Section 413 - 09 for
key- in-ignition warning chime
concerns. D2 CHECK THE GEM PID LAST DATA RECEIVED FOR
LUGGAGE COMPARTMENT z
Remove the ignition key from the ignition.
z Connect the diagnostic tool.
z Monitor the GEM PID LAST DATA RECEIVED while
pressing and releasing the luggage compartment, panic,
lock, and unlock buttons of the remote transmitter.
z Does LAST DATA RECEIVED match the button
presses of the remote transmitter? Yes
GO to
D5 .
No
GO to D3 .
D3 CHECK THE BATTERIES IN THE REMOTE
TRANSMITTER z
Install new batteries in the remote transmitter.
z Connect the diagnostic tool.
z Monitor the GEM FUNCTION TEST TIC/DATA while
pressing the luggage compartment button on the remote
transmitter.
z Does LAST DATA RECEIVED match the button
presses of the remote transmitter? Yes
SYSTEM is OK. REPEAT the
self-
test. CLEAR the DTCs.
No
GO to D4 .
D4 REPROGRAM THE REMOTE TRANSMITTERS TO THE
GEM z
NOTE: When carrying out the following procedure, it
must be noted that all previous programmed remote
transmitters will be erased. The customer needs to be
informed that any remote transmitters not present during
the programming mode will not operate the vehicle. All
remote transmitters must be programmed at the same
time.
z Reprogram the remote transmitter to the GEM. For
additional information, refer to Programming — Keyless
Entry Remote Transmitter .
z Connect the diagnostic tool.
z Monitor the GEM FUNCTION TEST TIC/DATA while
pressing the lock and unlock buttons on the remote
transmitter.
z Does LAST DATA RECEIVED match the button
presses of the remote transmitter? Yes
SYSTEM is OK. REPEAT the
self-
test. CLEAR the DTCs.
No
PROGRAM a new remote
transmitter to the vehicle. For
additional information, REFER
to Programming — Keyless
Entry Remote Transmitter .
REPEAT the self- test. CLEAR
the DTCs. If the problem still
remains, INSTALL a new GEM
and program the remote
transmitters to the vehicle. For
additional information, REFER
to Section 419 - 10 . REPEAT
the self- test. CLEAR the
DTCs. D5 CHECK THE GEM OUTPUT TO THE LUGGAGE
COMPARTMENT z
Trigger the GEM active command RELEASE to ON and
OFF.
z Did the luggage compartment release? Yes
INSTALL a new GEM. For
additional information, REFER
to
Section 419 - 10 . REPEAT
the self- test. CLEAR the
DTCs.
No
GO to D6 .
D6 CHECK CIRCUIT 931 (OG) FOR OPEN
z
Disconnect: Luggage Compartment Lid Release Relay.
z Measure the voltage between luggage compartment lid
release relay Pin 2, Circuit 931 (OG), harness side and
ground; and between luggage compartment lid release Yes
GO to
D7 .
No Klj . 15 ba
212003 Mustang Workshop Manual
18. 11. 2011file:///C:/Ford/2000 - 2004/tsocache/SHEF_5108/S3B~us~en~ ...

PINPOINT TEST E: PANIC FUNCTION DOES NOT OPERATE
CORRECTLY z
Is the resistance less than 5 ohms? D14 CHECK CIRCUIT 1205 (BK) FOR OPEN
z
Measure the resistance between luggage compartment
lid release solenoid C430 Pin 1, Circuit 1205 (BK),
harness side and ground.
z Is the resistance less than 5 ohms? Yes
INSTALL a new luggage
compartment lid release
switch. REPEAT the self-test.
CLEAR the DTCs.
No
REPAIR Circuit 1205 (BK).
REPEAT the self- test. CLEAR
the DTCs. Test Step Result / Action to Take
E1 CHECK IGNITION STATES
z
Connect the diagnostic tool.
z Monitor the GEM PIDS IGN_KEY, IGN_A, IGN_S, and
IGN_R while cycling the ignition switch through the OFF,
ACC, RUN, START and key out positions.
z Do the PID values agree with the ignition switch
positions? Yes
GO to
E2 .
No
REFER to Section 413 -
09 .
E2 CHECK THE GEM PID LAST DATA RECEIVED FOR PANIC
z
Remove the ignition key from the ignition.
z Connect the diagnostic tool.
z Monitor the GEM PID LAST DATA RECEIVED while pressing
and releasing the luggage compartment, panic, lock, and
unlock buttons of the remote transmitter.
z Does LAST DATA RECEIVED match the button presses
of the remote transmitter? Yes
GO to
E3 .
No
GO to Pinpoint Test D .
E3 CHECK THE COURTESY LAMPS
z
Connect the diagnostic tool.
z Trigger the GEM active command COURTESYL ON and
OFF.
z Do the courtesy lamps illuminate and turn off? Yes
GO to
E4 .
No
REFER to Section 417 -
02 . TEST the system for Klj . 18 ba
212003 Mustang Workshop Manual
18. 11. 2011file:///C:/Ford/2000 - 2004/tsocache/SHEF_5108/S3B~us~en~ ...

DESCRIPTION AND OPERATION
Wipers and Washers
The wiper and washer system consists of the following components:
zwindshield wiper mounting arm and pivot shaft
z pivot arms
z windshield wiper blades
z windshield washer reservoir
z windshield washer pump
z windshield wiper motor
z generic electronic module (GEM)
z multi- function switch
z windshield washer nozzle and bracket
SECTION 501-
16: Wipers and Washers 2003 Mustang Workshop Manual Klj . 1 ba
12003 Mustang Workshop Manual
18. 11. 2011file:///C:/Ford/2000 - 2004/tsocache/SHEF_5108/S3B~us~en~ ...