AC system FORD MUSTANG 2003 Workshop Manual

PINPOINT TEST H: THE DEFROST SYSTEM IS INOPERATIVE G5 CHECK DRIVER WINDOW REGULATOR CONTROL SWITCH
z
Disconnect: Driver Window Regulator Control Switch C537.
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
rear window
regulator motor.
REFER to
Motor —
Window Regulator,
Quarter 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. Test Step Result / Action to Take
H1 CHECK POWER TO INDICATOR LIGHT
z
Key in ON position.
z Depress the rear window defrost switch to ON.
z Is the rear window defrost switch indicator ON? Yes
GO to
H2 .
No
GO to H3 .
H2 CHECK CIRCUIT 186 (BR/LB) FOR AN OPEN
z
Key in OFF position.
z Disconnect: Heated Rear Window Relay.
z Disconnect: Heated Rear Window Grid Power Supply
Connector C402a.
z Measure the resistance between heated rear window relay,
circuit 186 (BN/LB), harness side and heated rear window
grid C402a, circuit 186 (BN/LB), harness side.
z Is the resistance less than 5 ohms? Yes
GO to
H7 .
No
REPAIR the circuit. TEST
the system for normal
operation. H3 CHECK THE DIAGNOSTIC TROUBLE CODES (DTCS)
z
Refer to the results from the previous instrument cluster
module (ICM) self- test.
z Was DTC B1343 retrieved? Yes
GO to
H4 . Klj . 25 ba
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No
GO to
H6 .
H4 CHECK CIRCUIT 175 (BK/YE)
z
Disconnect: ICM C220a.
z Key in ON position.
z Measure the voltage between ICM C220a pin 9, circuit 175
(BK/YE), harness side and ground.
z Is the voltage greater than 10 volts? Yes
GO to
H5 .
No
GO to H16 .
H5 CHECK CIRCUIT 175 (BK/YE) FOR A SHORT TO POWER
z
Disconnect: Rear Window Defrost Switch C241.
z Measure the voltage between rear window defrost switch
C241 pin 2, circuit 175 (BK/YE), harness side and ground.
z Is the voltage greater than 10 volts? Yes
REPAIR the circuit.
CLEAR the DTCs.
REPEAT the self-
test.
No
INSTALL a new rear
window defrost switch.
REFER to Rear Window Defrost Switch in this
section. TEST the system
for normal operation. H6 CHECK THE REAR HEATED WINDOW GRID POWER
z
Disconnect: Heated Rear Window Grid Power Supply
Connector C402a.
z Key in ON position.
z Depress the rear window defrost switch to ON.
z Measure the voltage between heated rear window grid
C402a circuit 186 (BN/LB), harness side and ground.
z Is the voltage greater than 10 volts? Yes
GO to
H7 .
No
GO to H8 .
H7 CHECK THE REAR WINDOW GROUND
z
Key in OFF position. Yes Klj . 26 ba
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z
Disconnect: Heated Rear Window Grid Ground Connector
C402b.
z Measure the resistance between heated rear window grid
C402b, circuit 1205 (BK), harness side and ground.
z Is the resistance less than 5 ohms? CARRY OUT the heated
rear window grid wire test.
REFER to Grid Wire Test
in Component Tests in this
section. TEST the system
for normal operation.
No
REPAIR the circuit. TEST
the system for normal
operation.
H8 CHECK CIRCUIT 727 (YE/BK)
z
Disconnect: Heated Rear Window Relay.
z Depress the rear window defrost switch to ON.
z Measure the resistance between heated rear window relay
pin 85, circuit 727 (YE/BK), harness side and ground.
z Is the resistance less than 5 ohms? Yes
GO to
H9 .
No
GO to H11 .
H9 CHECK CIRCUIT 185 (BK) FOR POWER
z
Measure the voltage between heated rear window relay pin
86 and pin 30, circuit 185 (BK), harness side and ground.
z Are the voltages greater than 10 volts? Yes
GO to
H10 .
No
REPAIR the supply circuit.
TEST the system for
normal operation. H10 CHECK CIRCUIT 186 (BR/LB) FOR AN OPEN
z
Using a fused jumper wire (15A), jumper across the heated
rear window relay pin 30, circuit 185 (BK), harness side and
the heated rear window relay pin 87, circuit 186 (BR/LB),
harness side. Yes
INSTALL a new heated
rear window relay. TEST
the system for normal
operation.
No
REPAIR circuit 186 Klj . 27 ba
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z
Is the rear window defrost switch indicator ON? (BR/LB). TEST the system
for normal operation.
H11 CHECK ICM OUTPUT
z
Trigger the ICM active command R DEFRLY to ON.
z Measure the resistance between the heated rear window
relay pin 85, circuit 727 (YE/BK), harness side and ground.
z Is the resistance less than 5 ohms? Yes
GO to
H13 .
No
GO to H12 .
H12 CHECK CIRCUIT 727 (YE/BK) FOR AN OPEN
z
Key in OFF position.
z Measure the resistance between ICM C220a pin 10, circuit
727 (YE/BK), harness side and the heated rear window relay
pin 85, circuit 727 (YE/BK) , harness side.
z Is the resistance less than 5 ohms? Yes
GO to
H16 .
No
REPAIR the circuit. TEST
the system for normal
operation. H13 CHECK POWER TO REAR WINDOW DEFROST SWITCH
z
Disconnect: Rear Window Defrost Switch C241.
z Key in ON position.
z Measure the voltage between the rear window defrost switch
C241 pin 1, circuit 883 (PK/LB), harness side and ground. Yes
GO to
H14 .
No
REPAIR the supply circuit.
TEST the system for
normal operation. Klj . 28 ba
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z
Is the voltage greater than 10 volts? H14 CHECK INPUT TO THE ICM
z
Connect: Rear Window Defrost Switch C241.
z Depress the rear window defrost switch to ON.
z Measure the voltage between ICM C220a pin 9, circuit 175
(BK/YE), harness side and ground.
z Is the voltage greater than 10 volts? Yes
GO to
H16 .
No
GO to H15 .
H15 CHECK CIRCUIT 175 (BK/YE) FOR AN OPEN
z
Key in OFF position.
z Measure the resistance between ICM C220a pin 9, circuit
175 (BK/YE), harness side and the rear window defrost
switch C241 pin 2, circuit 175 (BK/YE) , harness side.
z Is the resistance less than 5 ohms? Yes
INSTALL a new rear
window defrost switch.
REFER to
Rear Window Defrost Switch in this
section. TEST the system
for normal operation.
No
REPAIR the circuit. TEST
the system for normal
operation. H16 CHECK THE ICM FOR CORRECT OPERATION
z
Disconnect all ICM connectors.
z Check for:
zcorrosion
z pushed- out pins
z Connect all ICM connectors and make sure they seat
correctly.
z Operate the system and verify the concern is still present.
z Is the concern still present? Yes
INSTALL a new ICM.
REFER to
Section 413 - 01 .
CLEAR the DTCs.
REPEAT the self- test.
No
The system is operating
correctly at this time.
Concern may have been Klj . 29 ba
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PINPOINT TEST I: THE DEFROST SYSTEM WILL NOT SHUT OFF
AUTOMATICALLY caused by a loose or
corroded connector.
CLEAR the DTCs.
REPEAT the self-
test. Test Step Result / Action to Take
I1 CHECK CIRCUIT 727 (YE/BK)
z
Disconnect: Heated Rear Window Relay.
z Key in ON position.
z Depress the rear window defroster switch to OFF.
z Measure the resistance between heated rear window
relay pin 85, circuit 727 (YE/BK) , harness side and
ground.
z Is the resistance greater than 10,000 ohms? Yes
GO to
I3 .
No
GO to I2 .
I2 CHECK CIRCUIT 727 (YE/BK) FOR A SHORT TO
GROUND z
Key in OFF position.
z Measure the resistance between instrument cluster
module (ICM) C220a pin 10, circuit 727 (YE/BK) ,
harness side and ground.
z Is the resistance greater than 10,000 ohms? Yes
GO to
I4 .
No
REPAIR the circuit. TEST the
system for normal operation. I3 CHECK CIRCUIT 186 (BN/LB) FOR A SHORT TO POWER
z
Disconnect: Heated Rear Window Grid Power Supply
Connector C402a.
z Measure the voltage between heated rear window grid
C402a circuit 186 (BN/LB), harness side and ground. Yes
REPAIR the circuit. TEST the
system for normal operation.
No
INSTALL a new heated rear
window relay. TEST the
system for normal operation. Klj . 30 ba
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Component Tests
Grid Wire Test
1. Using a bright lamp inside the vehicle, inspect the wire grid from the exterior. A broken grid wire will appear as a brown spot.
2. Run the engine at idle. Set the rear window defrost switch to ON. The indicator light should come on.
3. Working from the interior of the vehicle with a voltmeter, contact the broad red- brown stripes of
the rear glass window positive lead to battery side and negative lead to ground side. The meter
should read 10- 13 volts. A lower voltage reading indicates a loose ground connection.
4. Contact a good ground point with the negative lead of the meter. The voltage reading should not differ.
5. With the negative lead of the meter grounded, touch each grid line of the heated rear window glass at its midpoint with the positive lead. A reading of approximately 6 volts indicates that the
line is good. A reading of zero volts indicates that the line is broken between the midpoint and
the B+ side of the grid line. A reading of 12 volts indicates that the circuit is broken between the
midpoint of the grid line and ground. z
Is the voltage greater than 10 volts? I4 CHECK THE ICM FOR CORRECT OPERATION
z
Disconnect all ICM connectors.
z Check for:
zcorrosion
z pushed- out pins
z Connect all ICM connectors and make sure they seat
correctly.
z Operate the system and verify the concern is still
present.
z Is the concern still present? Yes
INSTALL a new ICM. REFER
to Section 413
- 01 . CLEAR the
DTCs. REPEAT the self-test.
No
The system is operating
correctly at this time. Concern
may have been caused by a
loose or corroded connector.
CLEAR the DTCs. REPEAT
the self- test. Klj . 31 ba
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DESCRIPTION AND OPERATION
Handles, Locks, Latches And Mechanisms
Lock Cylinders
Individual lock cylinders are repaired by discarding the inoperative lock cylinder and building a new
lock cylinder using the appropriate lock repair package. The lock repair package includes a detailed
instruction sheet to build the new lock cylinder to the current key code of the vehicle.
Latch System
The door latch system consists of:
zfront door latch remote control and cable assembly
z front door latch (21812)
z door latch control rod knob (21850)
z door handle (22404) and front door latch actuating rod (22152)
z lock cylinder (22050) and front door latch control cylinder rod (22134)
z door latch striker plate (22008)
z front door latch remote control cable (221A00)
z door lock cylinder (21990)
z window regulator switch plates (14524)
z adjunct actuator (218B20)
z circuit wiring and circuit protection
z front door lock switch (14017)
z luggage compartment lid latch with mechanical interior release handle and cable
z luggage compartment lid lock cylinder
Refer to Section 501 - 14B .
Luggage Compartment Lid Remote Control Lock Switch
The luggage compartment remote control system consists of:
zluggage compartment remote control lock switch (19C542) located in the glove compartment
(06010)
z remote control lock actuator (part of the luggage compartment lid latch)
z circuit wiring and circuit protection
Refer to Section 501 - 14B .
SECTION 501-
14A: Handles, Locks, Latches and Mechanisms 2003 Mustang Workshop Manual Klj . 1 ba
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REMOVAL AND INSTALLATION
Ignition Lock Cylinder —
Non-Functional
Removal and Installation 1. NOTE: Make sure the front wheels are in the straight- ahead position.
Disconnect the battery ground cable (14301) and wait at least one minute to allow the depletion
of the restraint system backup power supply. For additional information, refer to Section 414 -
01 .
2. WARNING: To avoid the risk of serious personal injury, read and follow all
warnings, cautions, notes and instructions in the deactivation procedure.
Deactivate the supplemental restraint system (SRS). For additional information, refer to
Supplemental Restraint System (SRS) Deactivation and Reactivation in this section.
3. WARNING: To reduce the risk of serious personal injury, read and follow all
warnings, cautions, notes and instructions in the steering wheel removal and installation
procedure.
Remove the steering wheel assembly. For additional information, refer to Wheel in this section.
4. Twist off the cap from the ignition switch cylinder.
5. NOTE: The lock cylinder is repaired by discarding the inoperative lock cylinder and building a
new lock cylinder using the appropriate lock repair package (F85Z-11582- AA). The lock repair
package includes a detailed instruction sheet to build the new lock cylinder to the current key
code of the vehicle.
SECTION 501-
14A: Handles, Locks, Latches and Mechanisms 2003 Mustang Workshop Manual Klj . 1 ba
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9.
WARNING: To avoid the risk of serious personal injury, read and follow all
warnings, cautions, notes and instructions in the reactivation procedure.
Reactivate the supplemental restraint system (SRS). For additional information, refer to
Supplemental Restraint System (SRS) Deactivation and Reactivation in this section. Klj . 3 ba
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