AC system FORD MUSTANG 2003 Workshop Manual

z
Is the resistance less than 5 ohms? operation.
No
REPAIR the circuit.
TEST the system for
normal operation.
B6 CHECK THE LEFT/RIGHT INPUT
z
Measure the voltage between driver exterior rear view mirror C516
pin A, circuit 540 (RD), harness side and ground; or between
passenger exterior rear view mirror C622 pin B, circuit 543 (DG),
harness side and ground.
z Actuate the exterior rear view mirror control to the left position.
z Is the voltage greater than 10 volts? Yes
INSTALL a new
exterior rear view
mirror motor. REFER
to Mirror
— Motor in
this section. TEST
the system for normal
operation.
No
GO to B7 for driver
inoperative or GO to
B8 for passenger
inoperative. B7 CHECK CIRCUIT 540 (RD) FOR AN OPEN
z
Disconnect: Exterior Rear View Mirror Control C527.
z Measure the resistance between exterior rear view mirror control
C527 pin 4, circuit 540 (RD), harness side and driver exterior rear
view mirror C516 pin A, circuit 540 (RD), harness side.
z Is the resistance less than 5 ohms? Yes
INSTALL a new
exterior rear view
mirror control.
REFER to
Switch —
Exterior Rear View
Mirror Control in this
section. TEST the
system for normal
operation.
No
REPAIR the circuit.
TEST the system for
normal operation. B8 CHECK CIRCUIT 543 (DG) FOR AN OPEN
z
Disconnect: Exterior Rear View Mirror Control C527.
z Measure the resistance between exterior rear view mirror control
C527 pin 8, circuit 543 (DG), harness side and passenger exterior
rear view mirror C622 pin B, circuit 543 (DG), harness side. Yes
INSTALL a new
exterior rear view
mirror control.
REFER to
Switch —
Exterior Rear View
Mirror Control in this
section. TEST the
system for normal Klj . 5 ba
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PINPOINT TEST C: A SINGLE MIRROR DOES NOT FUNCTION WITH
SWITCH LOGIC z
Is the resistance less than 5 ohms? operation.
No
REPAIR the circuit.
TEST the system for
normal operation.
Test Step Result / Action to Take
C1 CHECK THE EXTERIOR REAR VIEW MIRROR LOGIC
z
Disconnect: Exterior Rear View MirrorC516 (Driver), or
C622 (Passenger).
z Disconnect the suspect exterior rear view mirror C516
driver or C622 passenger.
z Measure for voltage or resistance at the suspect exterior
rear view mirror harness side, while actuating the
exterior rear view mirror control according to the
following chart. Circuit Exterior rear view
mirror control
position Measure for
voltage or
resistance Driver
540
(RD) Left Greater than 10 volts
540
(RD) Right Less than 5 ohms
541
(DB) Up Greater than 10 volts
541
(DB) Down Less than 5 ohms
542
(YE) Left Less than 5 ohms
542
(YE) Right Greater than 10 volts
542
(YE) Up Less than 5 ohms
542
(YE) Down Greater than 10 volts
Exterior rear view
mirror control Measure for
voltage or Yes
INSTALL a new exterior rear
view mirror motor. REFER to
Mirror
— Motor in this section.
TEST the system for normal
operation.
No
GO to C2 . Klj . 6 ba
82003 Mustang Workshop Manual
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z
Is the circuit logic OK? Circuit position resistance
Passenger
543
(DG) Left Greater than 10 volts
543
(DG) Right Less than 5 ohms
544
(VT) Up Greater than 10 volts
544
(VT) Down Less than 5 ohms
542
(YE) Left Less than 5 ohms
542
(YE) Right Greater than 10 volts
542
(YE) Up Less than 5 ohms
542
(YE) Down Greater than 10 volts
C2 CHECK THE EXTERIOR REAR VIEW MIRROR
CONTROL z
Remove the exterior rear view mirror control. Leave the
harness connected.
z Measure for voltage or resistance at exterior rear view
mirror control C527 while actuating the exterior rear view
mirror control according to the following chart. Pin Circuit Exterior rear view
mirror control position Measure for
resistance or voltage 6 542
(YE) Left Less than 5 ohms
6 542
(YE) Right Greater than 10
volts 6 542
(YE) Up Less than 5 ohms
6 542
(YE) Down Greater than 10
volts Driver side selected
4 540
(RD) Left Greater than 10
volts 4 540
(RD) Right Less than 5 ohms
3 541
(DB) Up Greater than 10
volts 3 541
(DB) Down Less than 5 ohms
Passenger side selected
8 543 Left Greater than 10 Yes
REPAIR the circuits. TEST the
system for normal operation.
No
INSTALL a new exterior rear
view mirror control. REFER to
Switch
— Exterior Rear View
Mirror Control in this section.
TEST the system for normal
operation. Klj . 7 ba
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DESCRIPTION AND OPERATION
Seats
Seats —
Front Power
The front power seat features:
za six- way seat regulator control switch (14A701) located on the front of the seat.
z a seat track (61705) mounted under the seat.
z a seat regulator motor (14547) and gear housing mounted on the seat track (61705).
z an optional power lumbar switch located on the outboard side of the seat (14C715).
z a manual seat backrest release handle on the outboard rear corner of the seat.
z an optional power bolster and lumbar switches located on the inboard side of the seat (Cobra
only)
Seats — Power Lumbar Support
NOTE: The pump and solenoid module are serviced as an assembly with the front seat cushion frame
(Cobra only). The backrest bolster/lumbar adjusting pads are serviced together and the cushion
bolsters are serviced separately.
The power lumbar support system consists of: SECTION 501-
10: Seating 2003 Mustang Workshop Manual Item Part Number Description
1 611A08 Front seat backrest head restraint
2 65500 Front seat backrest pad adjuster
3 14C715 Seat control switch
4 14A701 Lumbar control switch
5 — Bolster and lumbar control switches (Cobra only) Klj . 1 ba
32003 Mustang Workshop Manual
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z
seat control switch (14C715)
z front seat backrest pad adjusting pump (65530)
z front seat adjusting motor drive tube (618B62)
z system wiring and circuit protection
z front seat backrest adjusting hose (65528)
z driver backrest and cushion bolster (Cobra)
z driver bolster and lumbar adjusting pad pump motor and solenoid module (Cobra)
z driver bolster and lumbar control switch (Cobra)
z driver seat cushion adjusting hose (Cobra)
Seats — Front Seat Backrest Latch
NOTE: Under no circumstances are the front seat backrest latch components to be repaired as
individual components. If a front seat backrest latch (62648) or component is non- functional or
damaged, a new front seat backrest latch must be installed.
A release handle on the outboard rear corner of the seat backrest is manually operated to unlock the
front seat backrest latch.
Rear Seat
The rear seat cushion pad and frame (600A88) is retained in the following manner:
zPins are located on the bottom front of the rear seat cushion pad and frame which secure the
rear seat cushion pad and frame to the front floor pan (11135).
z The pins are inserted into locking plates on the floor crossmember with a push button release.
z The bottom of the rear seatback frame is retained with screws to the front floor pan. Klj . 2 ba
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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 Tests
PINPOINT TEST A: THE POWER SEAT IS INOPERATIVE z
Seat track.
z The power seat does not
move vertically — front z
Seat regulator control
switch.
z Seat track.
z Circuitry. z
Go To Pinpoint Test
B .
z The power seat does not
move vertically — rear z
Seat regulator control
switch.
z Seat track.
z Circuitry. z
Go To Pinpoint Test
C .
z The power seat does not
move horizontally z
Seat regulator control
switch.
z Seat track.
z Circuitry. z
Go To Pinpoint Test
D .
z The power lumbar is
inoperative z
Lumbar motor.
z Lumbar seat control
switch.
z Circuitry. z
Go To Pinpoint Test
E .
z The power bolster/lumbar is
inoperative (Cobra only) z
Bolster/lumbar pump
and solenoid module.
z Bolster/lumbar seat
control switches.
z Circuitry. z
Go To Pinpoint Test
F .
Test Step Result / Action to Take
A1 CHECK CIRCUIT 566 (DG)
z
Disconnect: Seat Regulator Control Switch C360.
z Measure the voltage between seat regulator control
switch C360- 2, Circuit 566 (DG), harness side and
ground.
z Is the voltage greater than 10 volts? Yes
GO to
A2 .
No
REPAIR the circuit. TEST the
system for normal operation. A2 CHECK CIRCUIT 1205 (BK) FOR AN OPEN
z
Measure the resistance between seat regulator control
switch C360- 4, Circuit 1205 (BK), harness side and
ground. Yes
GO to
A3 .
No
REPAIR the circuit. TEST the
system for normal operation. Klj . 2 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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Circuit 979 (RD/LB), harness side; then between front height motor
C382, Circuit 990 (YE/LB), harness side and seat regulator control
switch C360-
5, Circuit 990 (YE/LB), harness side.
z Is the resistance less than 5 ohms? control switch.
REFER to
Switch —
Seat Regulator
Control . TEST the
system for normal
operation.
No
REPAIR the circuit.
TEST the system
for normal
operation. B3 CHECK CIRCUIT 979 (RD/LB) AND 990 (YE/LB) FOR A SHORT TO
GROUND 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 greater than 10,000 ohms? Yes
GO to
B4 .
No
REPAIR the circuit.
TEST the system
for normal
operation. B4 CHECK THE UP POSITION INPUT
z
Connect: Seat Regulator Control Switch C360.
z Measure the voltage between front height motor C382, Circuit 979
(RD/LB), harness side and ground.
z Actuate the seat regulator control switch to the front UP position.
z Is the voltage greater than 10 volts? Yes
GO to
B5 .
No
INSTALL a new
seat regulator
control switch.
REFER to Switch —
Seat Regulator
Control . TEST the
system for normal
operation. B5 CHECK THE DOWN POSITION INPUT
z
Measure the voltage between front height motor C382, Circuit 990
(YE/LB), harness side and ground. Yes
INSTALL a new
seat track. REFER
to
Seat Track .
TEST the system
for normal
operation. Klj . 4 ba
152003 Mustang Workshop Manual
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PINPOINT TEST C: THE POWER SEAT DOES NOT MOVE
VERTICALLY —
REAR z
Actuate the seat regulator control switch to the front DOWN position.
z Is the voltage greater than 10 volts? 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 C1 CHECK THE MOTOR SUPPLY CIRCUITS
z
Disconnect: Rear Height Motor C363.
z NOTE: Make sure all connectors are connected on the seat.
z Measure the resistance between rear height motor C363, Circuit 983
(RD/LG), harness side and ground and between rear height motor
C363, Circuit 982 (YE/LG), harness side and ground.
z Are the resistances less than 5 ohms? Yes
GO to
C3 .
No
GO to C2 .
C2 CHECK CIRCUIT 983 (RD/LG) AND 982 (YE/LG) FOR AN OPEN
z
Disconnect: Seat Regulator Control Switch C360.
z Measure the resistance between rear height motor C363, Circuit 983
(RD/LG), harness side and seat regulator control switch C360- 1,
Circuit 983 (RD/LG), harness side; then between rear height motor
C363, Circuit 982 (YE/LG), harness side and seat regulator control
switch C360- 6, Circuit 982 (YE/LG), harness side. Yes
INSTALL a new
seat regulator
control switch.
REFER to
Switch —
Seat Regulator
Control . TEST the
system for normal
operation.
No
REPAIR the circuit.
TEST the system
for normal
operation. Klj . 5 ba
152003 Mustang Workshop Manual
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