2003 FORD MUSTANG pinpoint

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
322003 Mustang Workshop Manual
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Pinpoint Tests
PINPOINT TEST A: NO COMMUNICATION WITH THE GENERIC
ELECTRONIC MODULE (GEM) inoperative —
rear,
convertible only z
Window regulator
motor.
z Driver window
regulator control
switch. Test G .
z The defrost system is
inoperative z
BJB fuse HTD BL
(30A).
z CJB fuse 23 (15A).
z Circuitry.
z Instrument cluster
module (ICM).
z Rear window
defrost switch.
z Heated rear
window grid. z
GO to Pinpoint Test H .
z The defrost system will not
shut off automatically z
Circuit.
z ICM.
z Rear window
defrost switch. z
GO to Pinpoint Test I .
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.
z Measure the resistance between the GEM C201b pin 4,
circuit 397 (BK/WH), harness side and ground. Yes
GO to
A3 .
No Klj . 6 ba
322003 Mustang Workshop Manual
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PINPOINT TEST B: ALL POWER WINDOWS ARE INOPERATIVE —
CONVERTIBLE z
Is the resistance less than 5 ohms? 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 THE POWER SUPPLY TO THE WINDOW
REGULATOR CONTROL SWITCH z
Key in OFF position.
z Disconnect: Driver Window Regulator Control Switch
C537.
z Key in ON position.
z Measure the voltage between driver window regulator
control switch C537 pin 15, circuit 400 (LB/BK), harness
side and ground.
z Is the voltage greater than 10 volts? Yes
GO to
B2 .
No
REPAIR the circuit. TEST the
system for normal operation. B2 CHECK CIRCUIT 1205 (BK) FOR AN OPEN
z
Measure the resistance between driver window regulator Yes Klj . 7 ba
322003 Mustang Workshop Manual
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PINPOINT TEST C: ALL POWER WINDOWS ARE INOPERATIVE —
COUPE control switch C537 pin 14, circuit 1205 (BK), harness
side and ground.
z Is the resistance less than 5 ohms? INSTALL a new driver window
regulator control switch.
REFER to
Switch — Window
Regulator Control in this
section. TEST the system for
normal operation.
No
REPAIR the circuit. TEST the
system for normal operation. Test Step Result / Action to Take
C1 CHECK THE POWER SUPPLY TO THE WINDOW
REGULATOR CONTROL SWITCH z
Key in OFF position.
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
C2 .
No
REPAIR the circuit. TEST the
system for normal operation. C2 CHECK CIRCUIT 1205 (BK) FOR AN OPEN
z
Measure the resistance between driver window regulator
control switch C508 pin 14, circuit 1205 (BK), harness
side and ground. Yes
INSTALL a new driver window
regulator control switch.
REFER to
Switch — Window
Regulator Control in this
section. TEST the system for
normal operation.
No
REPAIR the circuit. TEST the
system for normal operation. Klj . 8 ba
322003 Mustang Workshop Manual
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PINPOINT TEST D: A SINGLE POWER WINDOW IS INOPERATIVE —
DRIVER, CONVERTIBLE z
Is the resistance less than 5 ohms? Test Step Result / Action to Take
D1 CHECK THE IGNITION SWITCH INPUT TO THE GEM
z
Select GEM PID IGN_A, IGN_R, IGN_S and IGN_KEY.
z Insert the ignition key in the ignition switch and turn to each
position while monitoring PIDs.
z Did the PID values agree with the ignition switch
positions? Yes
GO to
D2 .
No
REFER to Section 211 - 05
for ignition switch
diagnosis.
D2 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
D9 .
No
GO to D3 .
D3 CHECK THE POWER SUPPLY TO THE WINDOW
REGULATOR CONTROL SWITCH z
Disconnect: Driver Window Regulator Control Switch C537.
z Key in ON position.
z Measure the voltage between driver window regulator control
switch C537 pin 15, circuit 400 (LB/BK), harness side and
ground.
z Is the voltage greater than 10 volts? Yes
GO to
D4 .
No
GO to D8 .
D4 CHECK CIRCUIT 1205 (BK) FOR AN OPEN
z
Measure the resistance between driver window regulator
control switch C537 pin 14, circuit 1205 (BK), harness side
and ground. Yes
GO to
D5 .
No
REPAIR the circuit. TEST
the system for normal
operation. Klj . 9 ba
322003 Mustang Workshop Manual
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PINPOINT TEST E: A SINGLE POWER WINDOW IS INOPERATIVE —
DRIVER, COUPE z
Is the resistance less than 5 ohms? D12 CHECK CIRCUIT 226 (WH/BK) FOR AN OPEN
z
Disconnect: GEM C201a.
z Measure the resistance between GEM C201a pin 2, circuit
226 (WH/BK), harness side and driver window regulator motor
C518, circuit 226 (WH/BK), harness side.
z Is the resistance less than 5 ohms? Yes
GO to
D13 .
No
REPAIR the circuit. TEST
the system for normal
operation. D13 CHECK CIRCUIT 400 (LB/BK) FOR AN OPEN TO THE GEM
z
Key in OFF position.
z Disconnect: CJB Circuit Breaker 43 (20A).
z Measure the resistance between GEM C021a pin 4, circuit
400 (LB/BK), harness side and CJB circuit breaker 43 (20A)
output pin, circuit 400 (LB/BK).
z Is the resistance less than 5 ohms? Yes
INSTALL a new GEM.
REFER to
Section 419 -
10 . TEST the system for
normal operation.
No
REPAIR the circuit. TEST
the system for normal
operation. Test Step Result / Action to Take
E1 CHECK THE IGNITION SWITCH INPUT TO THE GEM
z
Select GEM PID IGN_A, IGN_R, IGN_S and IGN_KEY.
z Insert the ignition key in the ignition switch and turn to each Yes
GO to
E2 . Klj . 13 ba
322003 Mustang Workshop Manual
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PINPOINT TEST F: A SINGLE POWER WINDOW IS INOPERATIVE —
PASSENGER FRONT z
Is the resistance less than 5 ohms? Test Step Result / Action to Take
F1 CHECK THE OPERATION FROM THE DRIVER WINDOW
REGULATOR CONTROL SWITCH z
Key in ON position.
z Operate the passenger window from the driver window
regulator control switch.
z Is the passenger window inoperative from the driver
window regulator control switch? Yes
GO to
F2 .
No
GO to F15 .
F2 CHECK CIRCUIT 334 (RD/YE) FOR GROUND
z
Key in OFF position.
z Disconnect: Passenger Window Regulator Motor C623.
z Measure the resistance between passenger window regulator
motor C623, circuit 334 (RD/YE), harness side and ground.
z Is the resistance less than 5 ohms? Yes
GO to
F8 .
No
GO to F3 .
F3 CHECK CIRCUIT 314 (TN/LB) FOR GROUND
z
Disconnect: Passenger Window Regulator Control Switch
C629.
z Measure the resistance between passenger window regulator
control switch C629 pin 9, circuit 314 (TN/LB), harness side
and ground. Yes
GO to
F7 .
No
GO to F4 for convertible
or GO to F5 for coupe. Klj . 18 ba
322003 Mustang Workshop Manual
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PINPOINT TEST G: A SINGLE POWER WINDOW IS INOPERATIVE —
REAR, CONVERTIBLE ONLY z
Is the voltage greater than 10 volts? For convertible, GO to
F16
. For coupe, REPAIR
the circuit. TEST the
system for normal
operation. F16 CHECK CIRCUIT 194 (PK) FOR AN OPEN
z
Key in OFF position.
z Disconnect: Driver Window Regulator Control Switch C537.
z Measure the resistance between driver window regulator
control switch C537 pin 16, circuit 194 (PK), harness side and
passenger window regulator control switch C629 pin 8, circuit
194 (PK), harness side.
z Is the resistance less than 5 ohms? Yes
INSTALL a new driver
window regulator control
switch. REFER to
Switch
— Window
Regulator Control in this
section. TEST the system
for normal operation.
No
REPAIR the circuit. TEST
the system for normal
operation. Test Step Result / Action to
Take G1 CHECK CIRCUIT 316 (YE/LB) OR 319 (YE/BK) FOR GROUND
z
Disconnect: Rear Window Regulator Motor C3118 LH or C3119 RH.
z Measure the resistance between left rear window regulator motor
C3118, circuit 316 (YE/LB), harness side and ground; or between
right rear window regulator motor C3119, circuit 319 (YE/BK),
harness side and ground.
z Is the resistance less than 5 ohms? Yes
GO to
G3 .
No
GO to G2 . Klj . 23 ba
322003 Mustang Workshop Manual
18. 11. 2011file:///C:/Ford/2000 - 2004/tsocache/SHEF_5108/S3B~us~en~ ...