2003 FORD MUSTANG pinpoint test b

Pinpoint Tests
PINPOINT TEST A: THE MIRRORS ARE INOPERATIVE z
Central junction box
(CJB) fuse 19 (15A).
z Circuitry.
z A single mirror is inoperative zExterior rear view
mirror control.
z Exterior rear view
mirror motor.
z Circuitry. z
Go To Pinpoint Test B .
z A single mirror does not
function with switch logic z
Exterior rear view
mirror control.
z Exterior rear view
mirror motor.
z Circuitry. z
Go To Pinpoint Test C .
Test Step Result / Action to
Take A1 CHECK CIRCUIT 326 (WH/VT)
z
Disconnect: Exterior Rear View Mirror Control C527.
z Measure the voltage between exterior rear view mirror control
C527 pin 1, circuit 326 (WH/VT), 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 exterior rear view mirror control
C527 pin 5, circuit 1205 (BK), harness side and ground.
z Is the resistance less than 5 ohms? Yes
GO to
A3 .
No
REPAIR the circuit.
TEST the system for
normal operation. A3 CHECK CIRCUIT 542 (YE) FOR AN OPEN Klj . 2 ba
82003 Mustang Workshop Manual
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PINPOINT TEST B: A SINGLE MIRROR IS INOPERATIVE z
Measure the resistance between passenger exterior rear view
mirror C622 pin C, circuit 542 (YE), harness side and exterior
rear view mirror control C527 pin 6, circuit 542 (YE), 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.
No
REPAIR the circuit.
TEST the system for
normal operation. Test Step Result / Action to
Take B1 CHECK THE COMMON FEED INPUT
z
Disconnect: Exterior Rear View Mirror C516 (Driver) C622
(Passenger).
z Disconnect the inoperative exterior rear view mirror C516 driver
side or C622 passenger side.
z Measure the voltage between driver exterior rear view mirror C516
pin C, circuit 542 (YE), harness side and ground; or between
passenger exterior rear view mirror C622 pin C, circuit 542 (YE),
harness side and ground.
z Select the inoperative side and actuate the exterior rear view
mirror control to the down position, then the right position.
z Are the voltages greater than 10 volts? Yes
GO to
B3 .
No
GO to B2 .
B2 CHECK CIRCUIT 542 (YE) FOR AN OPEN
z
Disconnect: Exterior Rear View Mirror Control C527.
z Measure the resistance between exterior rear view mirror control
C527 pin 6, circuit 542 (YE), harness side and driver exterior rear
view mirror C516 pin C, circuit 542 (YE), harness side; or between
exterior rear view mirror control C527 pin 6, circuit 542 (YE),
harness side and passenger exterior rear view mirror C622 pin C,
circuit 542 (YE), 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
operation. Klj . 3 ba
82003 Mustang Workshop Manual
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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
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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
152003 Mustang Workshop Manual
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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
152003 Mustang Workshop Manual
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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
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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PINPOINT TEST D: THE POWER SEAT DOES NOT MOVE
HORIZONTALLY z
Is the resistance less than 5 ohms? C3 CHECK CIRCUIT 983 (RD/LG) AND 982 (YE/LG) FOR A SHORT TO
GROUND 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 greater than 10,000 ohms? Yes
GO to
C4 .
No
REPAIR the circuit.
TEST the system
for normal
operation. C4 CHECK THE UP POSITION INPUT
z
Connect: Seat Regulator Control Switch C360.
z Measure the voltage between rear height motor C363, Circuit 983
(RD/LG), harness side and ground.
z Actuate the seat regulator control switch to the rear UP position.
z Is the voltage greater than 10 volts? Yes
GO to
C5 .
No
INSTALL a new
seat regulator
control switch.
REFER to Switch —
Seat Regulator
Control . TEST the
system for normal
operation. C5 CHECK THE DOWN POSITION INPUT
z
Measure the voltage between rear height motor C363, Circuit 982
(YE/LG), harness side and ground.
z Actuate the seat regulator control switch to the rear DOWN position.
z Is the voltage greater than 10 volts? Yes
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. Klj . 6 ba
152003 Mustang Workshop Manual
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