convertible FORD MUSTANG 2003 User Guide

PINPOINT TEST G: POOR QUALITY SOUND FROM ALL SPEAKERS
PINPOINT TEST H: THE SUBWOOFER IS INOPERATIVE z
Turn on the audio unit.
z Is the sound quality OK? system for normal
operation.
No
GO to
F7 .
F11 CHECK THE AUDIO UNIT
z
Key in OFF position.
z Substitute the affected audio unit with a known good component.
z Key in ON position.
z Turn on the audio unit.
z Is the sound quality OK? Yes
SEND the audio
unit to an
authorized Ford
audio system
repair facility.
TEST the system
for normal
operation.
No
REMOVE the
subwoofer
amplifier and
SEND it to an
authorized Ford
audio system
repair facility.
TEST the system
for normal
operation.
Test Step Result / Action to Take
G1 CHECK POOR SOUND QUALITY IN
ALL SPEAKERS z
Key in ON position.
z Turn on the audio unit.
z Carry out the speaker walk- around test
by pressing preset buttons 3 and 6
simultaneously.
z Is there poor quality or distortion in
all speakers? Yes
REMOVE the audio unit and SEND it to an
authorized Ford audio system repair facility.
TEST the system for normal operation.
No
GO to
Pinpoint Test F .
Test Step Result / Action to
Take H1 CHECK THE SUBWOOFER OPERATION
z
Key in ON position.
z Turn on the audio unit and listen for correct subwoofer operation.
z Are all subwoofers inoperative? Yes
GO to
H16 .
No
For convertible,
GO to H2 .
For coupe, GO to
H6 . Klj . 17 ba
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PINPOINT TEST I: LOUD POPPING WHEN CYCLING THE IGNITION
SWITCH—
CONVERTIBLE z
Is the resistance less than 5 ohms between the amplifier and
subwoofer speaker and greater that 10,000 ohms between the
subwoofer speaker harness and ground? 4 3 187
(DB/OR)
Speaker Circuits— Left Side Affected Subwoofer
Speaker Pin Respective Amplifier
Pin Circuit
1 4 176
(PK/LG) 3 3 179
(OR/RD) 2 4 189
(TN/LB) 4 3 187
(DB/OR) H16 CHECK THE AUDIO UNIT
z
Substitute a known good audio unit.
z Verify the operation of the audio unit.
z Does the audio unit operate correctly? Yes
SEND the audio
unit to an
authorized Ford
audio system
repair facility.
TEST the system
for normal
operation.
No
REMOVE the
subwoofer
amplifier and
SEND it to an
authorized Ford
audio system
repair facility.
TEST the system
for normal
operation.
Test Step Result / Action to Take
I1 CHECK SUBWOOFERS FOR LOUD
POPS z
Key in ON position.
z Listen to see whether the loud pops
are from the LH or RH subwoofer
amplifiers for the convertible.
z Are the pops from both subwoofer Yes
REMOVE the audio unit and SEND it to an
authorized Ford audio system repair facility.
TEST the system for normal operation. Klj . 23 ba
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amplifiers for the convertible? No
If the loud pops are from the convertible LH
subwoofer amplifier only, REPAIR circuit 173
(DG/VT). TEST the system for normal operation.
If the loud pops are from the convertible RH
subwoofer amplifier only, REPAIR circuit 174
(GY/BK). TEST the system for normal operation. Klj . 24 ba
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REMOVAL AND INSTALLATION
Subwoofer Amplifier —
Convertible
Removal and Installation 1. NOTE: The convertible top needs to be in the up position to remove the subwoofer amplifiers.
From inside the luggage compartment, remove the forward panel. 1. Remove the pin- type retainers.
2. Remove the forward panel.
2. NOTE: LH and RH subwoofer amplifiers are similar.
Remove the subwoofer amplifiers. 1. Disconnect the electrical connectors.
2. Remove the nuts.
3. Remove the subwoofer amplifiers.
3. To install, reverse the removal procedure.
SECTION 415-
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DESCRIPTION AND OPERATION
Speakers
NOTE:
Premium sound speakers (18808) are labeled with either 6 OHMS or 8 OHMS.
z The coupe has a four-speaker system, with two door- mounted speakers and two in the package
tray panel (46506).
z On the convertible, the two rear speakers are located behind the quarter trim panel. (31012)
z The MACH 460 subwoofer system has eight speakers. On the coupe, two are located in each
door and four are in the subwoofer assembly. On the convertible, two speakers are in each door
and two are mounted in each subwoofer assembly behind the rear quarter trim panels. Both the
coupe and convertible subwoofer assemblies are not repairable.
z The MACH 1000 has all the components of the MACH 460 system plus two additional
subwoofers located on each side of the trunk and four additional amplifiers. These subwoofers
can be serviced independently.
SECTION 415-
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REMOVAL AND INSTALLATION
Subwoofer Speaker —
Convertible
Removal and Installation 1. Remove the rear quarter trim panel. For additional information, refer to Section 501 - 05 .
2. Remove the subwoofer assembly. 1. Disconnect the electrical connectors.
2. Remove the screws.
3. Remove the subwoofer assembly.
3. To install, reverse the removal procedure.
SECTION 415-
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DESCRIPTION AND OPERATION
Interior Lighting
The interior lighting system consists of the following:
zmap/dome lamp assembly
z rear- high mount/cargo lamp assembly
z dimmer switch
z door ajar switch (located on the door latches)
z rear view mirror interior lamp (convertible only)
z courtesy lamp
z vanity mirror lamp assembly
z transmission range indicator
SECTION 417-
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as detected by the door ajar circuit. For vehicles equipped with the remote keyless entry feature, any
signal the GEM detects when a valid remote transmitter button is depressed will reset both the
demand and courtesy lamp battery saver timers. This battery saver relay then restores power to both
the demand and courtesy lamp circuits.
Base Courtesy and Extended Lighting
The base courtesy lighting feature provides interior lighting for the convenience of the vehicle's
occupants. The courtesy lamps consist of the map/dome lamps for the coupe and the map lamps for
the convertible. All lamps designated as courtesy lamps will be illuminated whenever the GEM detects
that the driver or passenger doors become ajar, by means of the driver or passenger door ajar circuits.
The courtesy lamps will also be illuminated when the GEM detects that the dome lamp switch has
been activated, by means of the dome lamp switch circuit.
The extended courtesy lighting feature provides temporary extended illumination of the courtesy lamps
after the customer has entered the vehicle. The courtesy lamps will remain illuminated for 25 seconds
after the GEM detects that the driver and passenger doors are closed, as detected by the door ajar
circuits. The extended courtesy lighting feature will be terminated after the 25 second time-
out period,
or if the GEM detects that the ignition switch has been moved from the OFF position to either the RUN,
ACC, or START positions.
Demand Lighting
The GEM does not provide any special features to the demand lighting group with the exception of
providing a power source when the battery saver feature is active. The demand lighting group consists
of the luggage compartment lamp, the driver and passenger vanity mirror lamps, and the map lamps.
Illuminated Entry with Remote Keyless Entry
The illuminated entry with remote keyless entry feature, provides power to the courtesy lamps when
the remote transmitter is used. When the GEM detects that the ignition switch is in the OFF or key out
positions, and it detects that a valid remote transmitter unlock button has been depressed, power to
the courtesy lamps will be enabled. The courtesy lamp circuit will remain powered until one of the
following occurs:
zThe GEM detects that the ignition switch has been moved from the OFF, to the RUN, START,
or ACC position.
z The GEM detects any valid remote transmitter lock button is depressed.
z The courtesy lamp circuit has been powered for 25 seconds.
If the GEM detects any valid remote transmitter unlock button has been depressed, and the ignition
switch is in the OFF or key out position during the 25 second time- out, the courtesy lamp circuits will
remain powered for an additional 25 seconds.
Inspection and Verification
1. The interior lighting system is a generic electronic module (GEM) controlled system.
2. Verify the customer concern by operating the interior lighting system.
3. Visually inspect for the following obvious signs of mechanical and electrical damage. Klj . 2 ba
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z
Monitor the GEM PID DECKLID, while opening and closing
the luggage compartment lid.
z Does the GEM PID DECKLID agree with the dome switch
position? Yes
GO to
B5 .
No
GO to B16 .
B5 CHECK THE COURTESY LAMP CIRCUITS
z
Close the luggage compartment lid and all doors are closed.
z Turn the dome and map lamp switches to the off position.
z Are the courtesy lamps illuminated? Yes
GO to
B12 .
No
GO to B6 .
B6 CHECK THE GEM CONTROL OF THE COURTESY LAMPS
z
Trigger the GEM active command COURTESYL ON and then
OFF.
z Do the courtesy lamps illuminate when the GEM active
command COURTESYL ON is triggered, and go out when
the GEM active command COURTESYL OFF is triggered? Yes
INSTALL a new GEM. For
additional information,
REFER to
Section 419 -
10 . REPEAT the self-
test.
CLEAR the DTCs.
No
GO to B7 .
B7 CHECK THE GEM FOR AN INTERNAL FAULT
z
Trigger the GEM active command COURTESYL ON, then
OFF.
z Can an audible click be heard coming from the GEM,
while triggering the active command COURTESYL ON? Yes
GO to
B8 .
No
INSTALL a new GEM. For
additional information,
REFER to Section 419 -
10 . REPEAT the self-
test.
CLEAR the DTCs. B8 CHECK CIRCUIT 1034 (BK/WH) FOR VOLTAGE
z
Disconnect the dome lamp C929 (coupe) or map lamp C978
(convertible)
z Trigger the GEM active command COURTESYL ON.
z Measure the voltage between dome/map lamp C929 (coupe)
Pin 3 or map lamp C978 (convertible) Pin 4, Circuit 1034
(BK/WH), harness side and ground.
z Is the voltage greater than 10 volts? Yes
GO to
B11 .
No
GO to B9 .
B9 CHECK CIRCUIT 1006 (DG/WH) FOR OPEN
NOTE:
Verify battery voltage at CJB Fuse 7 (20A) before
carrying out this test.
z Disconnect: GEM C201a.
z Measure the voltage between GEM C201a Pin 1, Circuit 1006
(DG/WH), harness side and ground. Yes
GO to
B10 .
No
REPAIR the circuit.
REPEAT the self- test.
CLEAR the DTCs. Klj . 8 ba
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z
Is the voltage greater than 10 volts? B10 CHECK CIRCUIT 1034 (BK/WH) FOR OPEN
z
Disconnect: GEM C201c.
z Measure the resistance between GEM C201c Pin 3, Circuit
1034 (BK/WH), harness side and dome/map lamp C929
(coupe) Pin 3 or map lamp C978 (convertible) Pin 4, Circuit
1034 (BK/WH), harness side.
z Is the resistance less than 5 ohms? Yes
INSTALL a new GEM. For
additional information,
REFER to
Section 419 -
10 . REPEAT the self-
test.
CLEAR the DTCs.
No
REPAIR the circuit.
REPEAT the self- test.
CLEAR the DTCs. B11 CHECK CIRCUIT 1205 (BK) FOR OPEN
z
Measure the resistance between dome/map lamp C929
(coupe) Pin 2 or map lamp C978 (convertible) Pin 1, Circuit
1205 (BK), harness side and ground.
z Is the resistance less than 5 ohms? Yes
INSTALL a new
dome/map lamp
assembly. For additional
information, REFER to
Lamp Assembly
—
Map/Dome .
No
REPAIR the circuit.
REPEAT the self- test.
CLEAR the DTCs. B12 CHECK CIRCUIT 1034 (BK/WH) FOR SHORT TO BATTERY
z
Measure the voltage between GEM C201c Pin 3, Circuit 1034
(BK/WH), harness side and ground. Yes
REPAIR the circuit.
REPEAT the self-
test.
CLEAR the DTCs.
No
INSTALL a new GEM. For
additional information,
REFER to Section 419 -
10 . REPEAT the self-
test.
CLEAR the DTCs. Klj . 9 ba
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