2003 FORD MUSTANG wiring

DIAGNOSIS AND TESTING
Seats
Refer to Wiring Diagrams Cell
120 , Power Seats for schematic and connector information.
Refer to Wiring Diagrams Cell 122 , Power Lumbar Seats for schematic and connector information.
Inspection and Verification 1. Verify the customer concern by operating the system.
2. Visually inspect for obvious signs of mechanical or electrical damage.
3. If an obvious cause for an observed or reported concern is found, correct the cause (if possible) before proceeding to the next step.
4. If the concern is not visually evident, verify the symptom. GO to Symptom Chart .
Symptom Chart
Refer to the Wiring Diagram manual for the connector numbers cited in the pinpoint tests. SECTION 501-
10: Seating 2003 Mustang Workshop Manual Special Tool(s)
73 III Automotive Meter
105-
R0057
Visual Inspection Chart Mechanical Electrical
z
Front seat track.
z Seat at limit(s) of travel. z
Battery junction box (BJB) Fuse Power Seat (25A).
z Loose, corroded or damaged connectors.
z Seat regulator control switch.
z Lumbar seat control switch.
z Lumbar motor.
z Bolster and lumbar control switches (cobra)
SYMPTOM CHART Condition
Possible Sources Action
z The power seat is
inoperative z
BJB Fuse Power Seat
(25A).
z Seat regulator control
switch.
z Circuitry. z
Go To Pinpoint Test
A . Klj . 1 ba
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PINPOINT TEST B: THE POWER SEAT DOES NOT MOVE
VERTICALLY —
FRONT z
Is the resistance less than 5 ohms? A3 CHECK THE SEAT REGULATOR CONTROL SWITCH
z
Carry out the seat regulator control switch component
test. Refer to Wiring Diagrams.
z Did the seat regulator control switch pass? Yes
CHECK for obstructed or binding
seat track. If no obstructions are
found, INSTALL a new seat
track. REFER to
Seat Track .
TEST the system for normal
operation.
No
INSTALL a new seat regulator
control switch. REFER to
Switch — Seat Regulator Control .
TEST the system for normal
operation. Test Step Result / Action to
Take B1 CHECK THE MOTOR SUPPLY CIRCUITS
z
Disconnect: Front Height Motor C382.
z NOTE: Make sure all connectors are connected on the seat.
z Measure the resistance between front height motor C382, Circuit
979 (RD/LB), harness side and ground and between front height
motor C382, Circuit 990 (YE/LB), harness side and ground.
z Are the resistances less than 5 ohms? Yes
GO to
B3 .
No
GO to B2 .
B2 CHECK CIRCUIT 979 (RD/LB) AND 990 (YE/LB) FOR AN OPEN
z
Disconnect: Seat Regulator Control Switch C360.
z Measure the resistance between front height motor C382, Circuit
979 (RD/LB), harness side and seat regulator control switch C360- 7, Yes
INSTALL a new
seat regulator Klj . 3 ba
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z
Is the resistance less than 5 ohms? F4 CHECK THE BOLSTER/LUMBAR SEAT CONTROL
SWITCHES z
Carry out the bolster/lumbar seat control switch component
test.
Refer to Wiring Diagrams Cell 149 for schematic and
connector information.
z Did the seat control switches pass? Yes
INSTALL a new
bolster/lumbar pump and
solenoid module. REFER to
Lumbar Motor
. TEST the
system for normal
operation.
No
INSTALL a new
bolster/lumbar seat control
switch. REFER to Lumbar Control Switch . TEST the
system for normal
operation. F5 CHECK THE LUMBAR ADJUSTING SYSTEM
z
Actuate the bolster/lumbar seat control switches to the
inflate position while observing the seat backrest lumbar
adjusting pad, backrest bolster and cushion bolster.
z Did the seat bolsters/lumbar adjusting pads inflate? Yes
GO to
F9 .
No
For seat backrest lumbar,
GO to F6 . For seat
backrest bolster, GO to
F10 . For seat cushion
bolster, GO to F14 .
F6 CHECK THE SEAT BACKREST LUMBAR ADJUSTING PAD
z
Visually inspect the seat backrest lumbar adjusting pad.
z Is the seat backrest lumbar adjusting pad damaged? Yes
INSTALL a new seat
backrest lumbar adjusting
pad. REFER to
Lumbar Assembly . TEST the
system for normal
operation.
No
GO to F7 .
F7 CHECK AIR FLOW FROM LUMBAR COMPRESSOR
z
Disconnect the seat backrest lumbar adjusting hose from
the connection at the seat pivot bolt.
z Actuate the lumbar seat control switch to the inflate position
while feeling for air at the connection.
z Is air felt at the lumbar motor hose connection? Yes
GO to
F8 .
No
INSTALL a new
bolster/lumbar pump and
solenoid module. REFER to Klj . 12 ba
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DIAGNOSIS AND TESTING
Glass, Frames and Mechanisms
Refer to Wiring Diagrams Cell
100 , Power Windows for schematic and connector information.
Refer to Wiring Diagrams Cell 56 , Rear Window Defrost for schematic and connector information.
Principles of Operation
Power Window Control
NOTE: Battery power and ground must be removed before disconnecting the GEM connectors to
avoid setting false DTCs.
The driver power window one- touch down operation is controlled by the generic electronic module
(GEM). This feature functions only when the ignition switch is in the RUN or ACCY positions. The GEM
determines ignition switch position by monitoring the key- in ignition, RUN/ACCY and RUN/START
circuits. The one-touch down operation is requested of the GEM by momentarily pressing the driver
window regulator control switch DOWN for 62 ms to 320 ms. The GEM uses the initial voltage input
from the down switch to begin the one- touch down operation. If the voltage input was less than 320
ms, the GEM will maintain the voltage supply to the motor down circuit. The GEM will maintain the
operation until:
zseven seconds expires.
z motor stall is detected by monitoring the current draw.
z a voltage input is received by the GEM on either the up or down switch circuits.
The ground for one- touch down operation does not pass through the GEM. The ground is supplied
through the driver window regulator control switch as with normal operation. If the GEM continues to
see voltage on the down circuit for more than 320 ms after initial activation the GEM will not effect
operation. The down circuit through the GEM is a direct connection to the motor in its normal state.
This allows the driver window regulator control switch to control the motor for normal operation.
The passenger window motors are hardwired directly to the window regulator control switches. SECTION 501-
11: Glass, Frames and Mechanisms 2003 Mustang Workshop Manual Special Tool(s)
Worldwide Diagnostic System
(WDS)
418-
F224,
New Generation STAR (NGS)
Tester
418- F052, or equivalent
diagnostic tool 73III Automotive Meter
105-
R0057 or equivalent Klj . 1 ba
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Symptom Chart
Refer to the Wiring Diagrams for the connector numbers stated in pinpoint tests.
Symptom Chart Condition
Possible Sources Action
z No communication with the
generic electronic module
(GEM) z
Central junction box
(CJB) fuse 39 (5A).
z GEM.
z Circuitry. z
GO to Pinpoint Test A .
z All power windows are
inoperative — convertible z
Circuitry.
z CJB circuit breaker
43 (20A).
z Window regulator
control switch. z
GO to Pinpoint Test B .
z All power windows are
inoperative — coupe z
Circuitry.
z CJB circuit breaker
43 (20A).
z Window regulator
control switch. z
GO to Pinpoint Test C .
z A single power window is
inoperative — driver,
convertible z
Circuitry.
z CJB fuse 43 (20A).
z Ignition switch.
z Window regulator
motor.
z Window regulator
control switch.
z GEM. z
GO to Pinpoint Test D .
z A single power window is
inoperative — driver, coupe z
Circuitry.
z CJB fuse 43 (20A).
z Ignition switch.
z Window regulator
motor.
z Window regulator
control switch.
z GEM. z
GO to Pinpoint Test E .
z The one- touch down feature
is inoperative z
Circuitry.
z CJB fuse 43 (20A).
z Ignition switch.
z Window regulator
motor.
z Window regulator
control switch.
z GEM. z
For convertible,
GO to Pinpoint Test D .
z For coupe, GO to
Pinpoint Test E .
z A single power window is
inoperative — passenger z
Circuitry.
z Driver window
regulator control
switch.
z Window regulator
motor.
z Passenger window
regulator control
switch. z
GO to Pinpoint Test F .
z A single power window is zCircuitry. zGO to Pinpoint Klj . 5 ba
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z
Is the resistance less than 5 ohms? D5 CHECK THE DRIVER WINDOW REGULATOR CONTROL
SWITCH z
Carry out the driver window regulator control switch
component test. Refer to the Wiring Diagrams Cell 149,
Component Testing.
z Did the driver window regulator control switch pass? Yes
GO to
D6 .
No
INSTALL a new driver
window regulator control
switch. REFER to
Switch — Window
Regulator Control in this
section. TEST the system
for normal operation. D6 CHECK CIRCUIT 226 (WH/BK) FOR A SHORT TO BATTERY
z
Key in OFF position.
z Disconnect: GEM C201a.
z Measure the voltage between GEM C201a pin 2, circuit 226
(WH/BK), harness side and ground.
z Key in ON position.
z Measure the voltage between GEM C201a pin 2, circuit 226
(WH/BK), harness side and ground.
z Is either voltage greater than 10 volts? Yes
REPAIR the circuit. TEST
the system for normal
operation.
No
GO to
D7 .
D7 CHECK CIRCUIT 991 (TN/LB) AND 992 (WH/BK) FOR AN
OPEN Klj . 10 ba
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position while monitoring PIDs.
z Did the PID values agree with the ignition switch positions? No
REFER to
Section 211 -
05 for ignition switch
diagnosis. E2 CHECK THE DRIVER WINDOW REGULATOR CONTROL
SWITCH INPUT TO THE GEM z
Key in ON position.
z Enter the following diagnostic mode on the diagnostic tool: GEM
PID D_UP_SW and D_DN_SW.
z Actuate the driver window regulator control switch to the UP and
DOWN position.
z Did the PID values agree with the driver window regulator
control switch positions? Yes
GO to
E9 .
No
GO to E3 .
E3 CHECK THE POWER SUPPLY TO THE WINDOW REGULATOR
CONTROL SWITCH z
Disconnect: Driver Window Regulator Control Switch C508.
z Key in ON position.
z Measure the voltage between driver window regulator control
switch C508 pin 10, circuit 400 (LB/BK), harness side and
ground.
z Is the voltage greater than 10 volts? Yes
GO to
E4 .
No
GO to E8 .
E4 CHECK CIRCUIT 1205 (BK) FOR AN OPEN
z
Measure the resistance between driver window regulator control
switch C508 pin 7, circuit 1205 (BK), harness side and ground;
and between driver window regulator control switch C508 pin
12, circuit 1205 (BK), harness side and ground.
z Is the resistance less than 5 ohms? Yes
GO to
E5 .
No
REPAIR the circuit.
TEST the system for
normal operation. E5 CHECK THE DRIVER WINDOW REGULATOR CONTROL
SWITCH z
Carry out the driver window regulator control switch component
test. Refer to the Wiring Diagrams Cell 149, Component
Testing.
z Did the driver window regulator control switch pass? Yes
GO to
E6 .
No
INSTALL a new driver Klj . 14 ba
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z
Is the resistance less than 5 ohms? section. TEST the system
for normal operation.
No
REPAIR the circuit. TEST
the system for normal
operation.
F13 CHECK CIRCUIT 333 (YE/RD) FOR AN OPEN
z
Measure the resistance between passenger window regulator
control switch C629 pin 10, circuit 333 (YE/RD), harness side
and passenger window regulator motor C623, circuit 333
(YE/RD), harness side.
z Is the resistance less than 5 ohms? Yes
INSTALL a new
passenger window
regulator control switch.
TEST the system for
normal operation.
No
REPAIR the circuit. TEST
the system for normal
operation.
F14 CHECK THE DRIVER WINDOW REGULATOR CONTROL
SWITCH z
Carry out the driver window regulator control switch
component test. REFER to Wiring Diagrams Cell 149,
Component Testing.
z Is the driver window regulator control switch OK? Yes
INSTALL a new
passenger window
regulator motor. REFER
to
Motor — Window
Regulator in this section.
TEST the system for
normal operation.
No
INSTALL a new driver
window regulator control
switch. REFER to
Switch — Window
Regulator Control in this
section. TEST the system
for normal operation. F15 CHECK THE POWER SUPPLY TO THE PASSENGER
WINDOW REGULATOR CONTROL SWITCH z
Key in OFF position.
z Disconnect: Passenger Window Regulator Control Switch
C629.
z Key in ON position.
z Measure the voltage between passenger window regulator
control switch C629 pin 8, circuit 194 (PK), harness side and
ground. Yes
INSTALL a new
passenger window
regulator control switch.
TEST the system for
normal operation.
No Klj . 22 ba
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