AC system FORD MUSTANG 2003 Workshop Manual

z
Is the voltage greater than 10 volts? A4 CHECK CIRCUIT 10 (LG/RD) FOR AN OPEN
z
Disconnect: Deactivator Switch C2210.
z Measure the voltage between deactivator switch C2210 Pin 1,
Circuit 10 (LG/RD), harness side and ground.
z Is the voltage greater than 10 volts? Yes
GO to
A5 .
No
REPAIR the circuit.
TEST the system for
normal operation. A5 CHECK CIRCUIT 636 (OG) FOR AN OPEN
z
Measure the resistance between speed control servo C122 Pin
9, Circuit 636 (OG), harness side and deactivator switch C2210
Pin 2, Circuit 636 (OG), harness side.
z Is the resistance less than 5 ohms? Yes
INSTALL a new
deactivator switch;
REFER to
Switch —
Deactivator . TEST the
system for normal
operation.
No
REPAIR the circuit.
TEST the system for
normal operation. A6 CHECK THE SPEED CONTROL ACTUATOR SWITCH ON
CIRCUITRY z
Measure the voltage between speed control servo C122 Pin 5,
Circuit 151 (LB/BK), harness side and speed control servo C122
Pin 10, Circuit 1205 (BK), harness side, while the speed control
actuator switch ON is depressed. Yes
GO to
A9 .
No
GO to A7 . Klj . 5 ba
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z
Is the voltage greater than 10 volts? A7 CHECK CIRCUIT 151 (LB/BK) FOR AN OPEN
z
Disconnect: Air Bag Sliding Contact C218a.
z Measure the resistance between speed control servo C122 Pin
5, Circuit 151 (LB/BK), harness side and air bag sliding contact
C218a Pin 4, Circuit 151 (LB/BK), harness side.
z Is the resistance less than 5 ohms? Yes
GO to
A8 .
No
REPAIR the circuit.
TEST the system for
normal operation. A8 CHECK THE AIR BAG SLIDING CONTACT
z
Remove the air bag; REFER to Section 501 - 20B .
z Disconnect: Speed Control Actuator Switch.
z Measure the resistance between bottom of air bag sliding
contact Pin 1 (component side) and top of air bag sliding
contact Pin 3 (component side).
z Is the resistance less than 5 ohms? Yes
INSTALL a new speed
control actuator switch;
REFER to
Switch —
Speed Control
Actuator . TEST the
system for normal
operation.
No
INSTALL a new air bag
sliding contact; REFER
to Section 501 - 20B .
TEST the system for
normal operation. A9 CHECK THE SPEED CONTROL ACTUATOR SWITCH ON
CIRCUITRY FOR SHORT TO POWER z
Key in ON position.
z Measure the voltage between speed control servo C122 Pin 5,
Circuit 151 (LB/BK), harness side and speed control servo C122
Pin 10, Circuit 1205 (BK), harness side. Yes
GO to
A10 .
No
GO to A12 . Klj . 6 ba
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z
Is any voltage present? A10 CHECK CIRCUIT 151 (LB/BK) FOR SHORT TO POWER
z
Key in OFF position.
z Disconnect: Air Bag Sliding Contact C218a.
z Key in ON position.
z Measure the voltage between speed control servo C122 Pin 5,
Circuit 151 (LB/BK), harness side and speed control servo C122
Pin 10, Circuit 1205 (BK), harness side.
z Is any voltage present? Yes
REPAIR the circuit.
TEST the system for
normal operation.
No
GO to
A11 .
A11 CHECK THE AIR BAG SLIDING CONTACT
z
Key in OFF position.
z Remove the air bag; REFER to Section 501 - 20B .
z Disconnect: Speed Control Actuator Switch.
z Key in ON position.
z Measure the voltage between bottom of air bag sliding contact
Pin 1 (component side) and ground.
z Is any voltage present? Yes
INSTALL a new air bag
sliding contact; REFER
to Section 501
- 20B .
TEST the system for
normal operation.
No
INSTALL a new speed
control actuator switch;
REFER to Switch —
Speed Control
Actuator . TEST the
system for normal
operation. A12 CHECK THE SPEED CONTROL ACTUATOR SET/ACCEL
CIRCUITRY z
Key in OFF position.
z Measure the resistance between speed control servo C122 Pin
5, Circuit 151 (LB/BK), harness side and speed control servo
C122 Pin 6, Circuit 848 (DG/OG), harness side, while the speed
control actuator switch SET/ACCEL is depressed. Yes
GO to
A13 .
No
INSTALL a new speed
control actuator switch; Klj . 7 ba
132003 Mustang Workshop Manual
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z
Is the resistance between 612 and 748 ohms? REFER to
Switch —
Speed Control
Actuator . TEST the
system for normal
operation. A13 CHECK THE BPP SWITCH CIRCUITRY
z
Measure the resistance between speed control servo C122 Pin
4, Circuit 511 (LG), harness side, and speed control servo C122
Pin 10, Circuit 1205 (BK), harness side.
z Is the resistance less than 20 ohms? Yes
GO to
A16 .
No
If automatic
transmission, REPAIR
Circuit 511 (LG) and
Circuit 810 (LG/RD) as
necessary. TEST the
system for normal
operation.
If manual transmission,
GO to A14 .
A14 CHECK CIRCUIT 511 (LG) AND CIRCUIT 810 (RD/LG) FOR
AN OPEN z
Disconnect: CPP Switch C2072.
z Measure the resistance between CPP Switch C2072 Pin 1,
Circuit 511 (LG), harness side and ground.
z Is the resistance less than 20 ohms? Yes
GO to
A15 .
No
REPAIR Circuit 511
(LG) and Circuit 810
(LG/RD) as necessary.
TEST the system for
normal operation. A15 CHECK CIRCUIT 511 (LG) FOR AN OPEN
z
Measure the resistance between speed control servo C122 Pin
4, Circuit 511 (LG), harness side and CPP switch C2072 Pin 2,
Circuit 511 (LG), harness side. Yes
INSTALL a new CPP
switch. TEST the
system for normal
operation.
No
REPAIR the circuit.
TEST the system for
normal operation. Klj . 8 ba
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PINPOINT TEST B: THE SET SPEED FLUCTUATES z
Is the resistance less than 5 ohms? A16 CHECK CIRCUIT 239 (WH/OG) FOR AN OPEN
z
Disconnect: PCM C175.
z Connect EEC- V 104-Pin Breakout Box.
z Measure the resistance between speed control servo C122 pin
3, circuit 239 (WH/OG), harness side and Breakout Box, EEC- V
Control System pin 68, circuit 239 (WH/OG), harness side.
z Is the resistance less than 5 ohms? Yes
GO to
A17 .
No
REPAIR the circuit.
TEST the system for
normal operation. A17 CHECK THE SPEED CONTROL SERVO
z
INSTALL a known good speed control servo.
z Test drive the vehicle for correct operation.
z Does the speed control operate correctly? Yes
INSTALL a new speed
control servo; REFER to
Actuator
— Speed
Control Servo . TEST
the system for normal
operation.
No
INSTALL a new PCM;
REFER to Section 303 -
14 . TEST the system
for normal operation. Test Step Result / Action to Take
B1 CHECK THAT CONDITION OCCURS
ONLY WHILE USING SPEED CONTROL z
Check that the condition does not occur
when driving without speed control.
z Does the condition occur without
speed control? Yes
REPAIR engine as necessary. TEST the
system for normal operation.
No
GO to
B2 . Klj . 9 ba
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PINPOINT TEST C: THE SPEED CONTROL DOES NOT DISENGAGE
WHEN THE BRAKES ARE APPLIED
PINPOINT TEST D: THE SPEED CONTROL DOES NOT DISENGAGE
WHEN THE CLUTCH IS APPLIED B2 CHECK THE SPEED CONTROL
ACTUATOR CABLE z
NOTE: The speed control actuator cable
must be disconnected at both ends while
carrying out this test.
z Check the speed control actuator cable
for sticking or binding at the speed
control servo and throttle body.
z Is the speed control actuator cable
OK? Yes
GO to
B3 .
No
INSTALL a new speed control actuator cable;
REFER to Actuator Cable — Speed Control .
TEST the system for normal operation. B3 CHECK THE SPEED CONTROL SERVO
z
INSTALL a known good speed control
servo.
z Test drive the vehicle for correct
operation.
z Does the speed control operate
correctly? Yes
INSTALL a new speed control servo; REFER
to
Actuator — Speed Control Servo . TEST the
system for normal operation.
No
INSTALL a new PCM; REFER to Section 303 -
14 . TEST the system for normal operation.
Test Step Result / Action to Take
C1 CHECK THE BPP SWITCH CIRCUITRY
z
Key in OFF position.
z Disconnect: Speed Control Servo C122 .
z Measure the voltage between speed control servo C122 Pin 4,
Circuit 511 (LG), harness side and speed control servo C122
Pin 10, Circuit 1205 (BK), harness side, while depressing the
brake pedal.
z Is the voltage greater than 10 volts? Yes
INSTALL a new speed
control servo; REFER to
Actuator
— Speed
Control Servo . TEST
the system for normal
operation.
No
REPAIR Circuit 810
(RD/LG) and Circuit 511
(LG) as necessary.
TEST the system for
normal operation. Test Step Result / Action to Take
D1 CHECK THE CLUTCH PEDAL POSITION (CPP) SWITCH
z
Key in OFF position.
z Disconnect: CPP Switch C2072.
z Measure the resistance between CPP switch pin 2
(component side) and CPP switch pin 1 (component side), Yes
INSTALL a new speed
control servo; REFER to
Actuator
— Speed Control Klj . 10 ba
132003 Mustang Workshop Manual
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PINPOINT TEST E: THE SPEED CONTROL SWITCH IS
INOPERATIVE—
COAST
PINPOINT TEST F: THE SPEED CONTROL SWITCH IS
INOPERATIVE— SET/ACCEL while depressing and releasing clutch pedal.
z Is the resistance greater than 10,000 ohms with the
clutch pedal depressed and less than 5 ohms with the
clutch pedal released? Servo . TEST the system
for normal operation.
No
INSTALL a new CPP
switch. TEST the system
for normal operation. Test Step Result / Action to
Take E1 CHECK THE SPEED CONTROL ACTUATOR SWITCH
z
Key in OFF position.
z Disconnect: Speed Control Servo C122.
z Measure the resistance between speed control servo C122 Pin
5, Circuit 151 (LB/BK), harness side and speed control servo
C122 Pin 6, Circuit 848 (DG/OG), harness side, while pressing
the speed control actuator switch COAST.
z Is the resistance between 108 and 132 ohms? Yes
INSTALL a new speed
control servo; REFER
to
Actuator — Speed
Control Servo . TEST
the system for normal
operation.
No
INSTALL a new speed
control actuator switch;
REFER to Switch —
Speed Control
Actuator . TEST the
system for normal
operation. Test Step Result / Action to
Take F1 CHECK THE SPEED CONTROL ACTUATOR SWITCH
z
Key in OFF position.
z Disconnect: Speed Control Servo C122.
z Measure the resistance between speed control servo C122 Pin 5,
Circuit 151 (LB/BK), harness side and speed control servo C122
Pin 6, Circuit 848 (DG/OG), harness side, while pressing the
speed control actuator switch SET/ACCEL. Yes
INSTALL a new speed
control servo; REFER
to
Actuator — Speed
Control Servo . TEST
the system for normal
operation. Klj . 11 ba
132003 Mustang Workshop Manual
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PINPOINT TEST G: THE SPEED CONTROL SWITCH IS
INOPERATIVE —
RESUME
PINPOINT TEST H: THE SPEED CONTROL SWITCH IS
INOPERATIVE— OFF z
Is the resistance between 612 and 748 ohms? No
INSTALL a new speed
control actuator switch;
REFER to
Switch —
Speed Control
Actuator . TEST the
system for normal
operation. Test Step Result / Action to
Take G1 CHECK THE SPEED CONTROL ACTUATOR SWITCH
z
Key in OFF position.
z Disconnect: Speed Control Servo C122.
z Measure the resistance between speed control servo C122 Pin
5, Circuit 151 (LB/BK), harness side and speed control servo
C122 Pin 6, Circuit 848 (DG/OG), harness side while pressing
the speed control actuator switch RESUME.
z Is the resistance between 1,980 and 2,420 ohms? Yes
INSTALL a new speed
control servo; REFER
to
Actuator — Speed
Control Servo . TEST
the system for normal
operation.
No
INSTALL a new speed
control actuator switch;
REFER to Switch —
Speed Control
Actuator . TEST the
system for normal
operation. Test Step Result / Action to
Take H1 CHECK THE SPEED CONTROL ACTUATOR SWITCH
z
Key in OFF position.
z Disconnect: Speed Control Servo C122.
z Measure the resistance between speed control servo C122 Pin
5, Circuit 151 (LB/BK), harness side and speed control servo
C122 Pin 6, Circuit 848 (DG/OG), harness side while pressing
the speed control actuator switch OFF. Yes
INSTALL a new speed
control servo; REFER
to
Actuator — Speed
Control Servo . TEST
the system for normal
operation.
No Klj . 12 ba
132003 Mustang Workshop Manual
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z
Is the resistance less than 5 ohms? INSTALL a new speed
control actuator switch;
REFER to
Switch —
Speed Control
Actuator . TEST the
system for normal
operation. Klj . 13 ba
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SPECIFICATIONS
a
Manifold gauge set pressures may vary slightly depending on the distance between the service
SECTION 412-
00: Climate Control System - General Information 2003 Mustang Workshop Manual General Specifications
Item Specification
A/C Compressor
Type FS-
10 swashplate, 5 double- acting pistons Displacement 170 cc (10.4 cu in)
Rotation Clockwise
A/C Pressure Relief Valve
a Open pressures 3,792-
4,137 kPa (550- 600 psi) A/C Pressure Sensor Refer to the Powertrain Control/Emissions
Diagnosis (PC/ED) manual.
Coolant Hose Lubricant
MERPOL® ESE-
M99B144- B Evaporator Core Orifice
Color Orange
Diameter 1.45 mm (0.057 in)
Magnetic Clutch
Air gap clearance 0.35-
0.75 mm (0.014- 0.030 in) Dual Function Pressure Switch (V8)
a Fan on/open 2,137-
2,344 kPa (310- 340 psi) Fan off/close 1,655-
2,137 kPa (240- 310 psi) Clutch off/open 2,999-
3,275 kPa (435- 475 psi) Clutch on/closed 1,517-
1,931 kPa (220- 280 psi) Pressure Cutoff Switch (V6)
a Open 2,999-
3,275 kPa (435- 475 psi) Close 1,586-
1,999 kPa (230- 290 psi) A/C Cycling Switch Open and Closed Pressures
a Open pressure 145-
159 kPa (21- 23 psi) Close pressure 290 kPa (42 psi)
Refrigerant Lubricant and Capacity
PAG Refrigerant Compressor Oil (R-134a Systems)
F7AZ- 19589- DA (Motorcraft YN-12- C) WSH-
M1C231- B Capacity 254 ml (8.6 oz)
Refrigerant and Capacity
R134a Refrigerant YN-
19 WSH-
M17B19- A Capacity .96 kg (34 oz)
Refrigerant System Cleaner
A/C Systems Flushing Solvent F4AZ-19579-
A — Klj . 1 ba
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