2003 FORD MUSTANG Workshop Manual

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Page 3673 of 4378

FORD MUSTANG 2003 Workshop Manual Test Step Result / Action to
Take D1 CHECK THE MOTOR SUPPLY CIRCUITS
�z
Disconnect: Horizontal Motor C362.
�z NOTE: Make sure all connectors are connected on the seat.
�z Measure the resistance

Page 3674 of 4378

FORD MUSTANG 2003 Workshop Manual PINPOINT TEST E: THE POWER LUMBAR IS INOPERATIVE D4 CHECK THE REARWARD POSITION INPUT
�z
Connect: Seat Regulator Control Switch C360.
�z Measure the voltage between horizontal motor C362, Circuit 9

Page 3675 of 4378

FORD MUSTANG 2003 Workshop Manual �z
Is the voltage greater than 10 volts? E3 CHECK CIRCUIT 1205 (BK) FOR AN OPEN
�z
Disconnect: Lumbar Motor C366.
�z Measure the resistance between lumbar motor C366, Circuit
1205 (BK), harness si

Page 3676 of 4378

FORD MUSTANG 2003 Workshop Manual �z
Is the resistance less than 5 ohms? E6 CHECK THE LUMBAR ADJUSTING SYSTEM
�z
Actuate the lumbar seat control switch to the inflate position
while observing the seat backrest lumbar adjusting pad.

z
Is the resistance less than 5 ohms? E6 CHECK THE LUMBAR ADJUSTING SYSTEM
z
Actuate the lumbar seat control switch to the inflate position
while observing the seat backrest lumbar adjusting pad.
z Did the seat backrest lumbar adjusting pad inflate? Yes
GO to
E10 .
No
GO to E7 .
E7 CHECK THE SEAT BACKREST LUMBAR ADJUSTING PAD
z
Visually inspect the seat backrest lumbar adjusting pad.
z Is the seat backrest lumbar adjusting pad damaged? Yes
INSTALL a new seat
backrest lumbar adjusting
pad. REFER to
Lumbar Assembly . TEST the
system for normal
operation.
No
GO to E8 .
E8 CHECK AIR FLOW FROM LUMBAR COMPRESSOR
z
Disconnect the seat backrest lumbar adjusting hose from the
lumbar motor.
z Actuate the lumbar seat control switch to the inflate position
while feeling for air at the motor connection.
z Is air felt at the lumbar motor hose connection? Yes
GO to
E9 .
No
INSTALL a new lumbar
motor. REFER to Lumbar Motor . TEST the system
for normal operation. E9 CHECK THE AIR FLOW FROM THE LUMBAR SEAT
CONTROL SWITCH z
Reconnect the hose to the lumbar motor.
z Disconnect the seat backrest lumbar adjusting hose at the
lumbar seat control switch.
z Actuate the lumbar seat control switch to the inflate position.
z Is air felt at the seat backrest lumbar adjusting hose? Yes
GO to
E10 .
No
INSTALL a new seat
backrest lumbar adjusting
hose. TEST the system
for normal operation. E10 CHECK THE SYSTEM FOR LEAKS
z
Reconnect the hose at the lumbar seat control switch.
z Disconnect the seat backrest lumbar adjusting hose at the
seat backrest lumbar adjusting pad.
z Install an in- line pressure gauge on the hose.
z Actuate the lumbar seat control switch to the inflate position
until the gauge reads 34.47 kPa (5 psi). The system should
hold pressure for three hours.
z After three hours, is the pressure reading 32.41 kPa (4.7 Yes
The system is operating
correctly. TEST the
system for normal
operation.
No
GO to
E11 . Klj . 10 ba
152003 Mustang Workshop Manual
18. 11. 2011file:///C:/Ford/2000 - 2004/tsocache/SHEF_5108/S3B~us~en~ ...

Page 3677 of 4378

FORD MUSTANG 2003 Workshop Manual PINPOINT TEST F: THE POWER BOLSTER/LUMBAR IS
INOPERATIVE —
DRIVER psi) or more?
E11 CHECK THE SEAT BACKREST LUMBAR ADJUSTING PAD
FOR LEAKS �z
Remove the in- line pressure gauge.
�z Use a hand p

Page 3678 of 4378

FORD MUSTANG 2003 Workshop Manual �z
Is the resistance less than 5 ohms? F4 CHECK THE BOLSTER/LUMBAR SEAT CONTROL
SWITCHES �z
Carry out the bolster/lumbar seat control switch component
test.
Refer to Wiring Diagrams Cell 149 fo

Page 3679 of 4378

FORD MUSTANG 2003 Workshop Manual Front Seat Cushion . TEST
the system for normal
operation. F8 CHECK THE SYSTEM FOR LEAKS
�z
Reconnect the hose at the seat backrest lumbar pivot bolt.
�z Disconnect the seat backrest lumbar adju

Front Seat Cushion . TEST
the system for normal
operation. F8 CHECK THE SYSTEM FOR LEAKS
z
Reconnect the hose at the seat backrest lumbar pivot bolt.
z Disconnect the seat backrest lumbar adjusting hose at the
seat backrest lumbar adjusting pad.
z Install an in- line pressure gauge on the hose.
z Actuate the lumbar seat control switch to the inflate position
until the gauge reads 34.47 kPa (5 psi). The system should
hold pressure for three hours.
z After three hours, is the pressure reading 32.41 kPa (4.7
psi) or more? Yes
The system is operating
correctly. TEST the system
for normal operation.
No
GO to
F9 .
F9 CHECK THE SEAT BACKREST LUMBAR ADJUSTING PAD
FOR LEAKS z
Remove the in- line pressure gauge.
z Use a hand pump and inflate the seat backrest lumbar
adjusting pad to 34.47 kPa (5 psi). The seat backrest
lumbar adjusting pad should hold pressure for three hours.
z After three hours, is the pressure reading 32.41 kPa (4.7
psi) or more? Yes
INSTALL a new
bolster/lumbar pump and
solenoid module. REFER to
Lumbar Motor
. TEST the
system for normal
operation.
No
INSTALL a new seat
backrest lumbar adjusting
pad. REFER to Lumbar Assembly . TEST the
system for normal
operation. F10 CHECK THE SEAT BACKREST BOLSTER ADJUSTING
PADS z
Visually inspect the seat backrest bolster adjusting pad.
z Is the seat backrest bolster adjusting pad damaged? Yes
INSTALL a new seat
backrest bolster adjusting
pad. REFER to
Lumbar Assembly . TEST the
system for normal
operation.
No
GO to F11 .
F11 CHECK AIR FLOW FROM BOLSTER COMPRESSOR
z
Disconnect the seat backrest bolster adjusting hose from
the connection at the seat pivot bolt.
z Actuate the bolster seat control switch to the inflate position
while feeling for air at the connection.
z Is air felt at the lumbar motor hose connection? Yes
GO to
F12 .
No
INSTALL a new
bolster/lumbar pump and
solenoid module. REFER to
Lumbar Motor . TEST the
system for normal
operation. F12 CHECK THE SYSTEM FOR LEAKS
z
Reconnect the hose at the seat backrest bolster pivot bolt.
z Disconnect the seat backrest bolster adjusting hose at the
seat backrest bolster adjusting pad.
z Install an in- line pressure gauge on the hose. Yes
The system is operating
correctly. TEST the system
for normal operation. Klj . 13 ba
152003 Mustang Workshop Manual
18. 11. 2011file:///C:/Ford/2000 - 2004/tsocache/SHEF_5108/S3B~us~en~ ...

Page 3680 of 4378

FORD MUSTANG 2003 Workshop Manual �z
Actuate the bolster seat control switch to the inflate position
until the gauge reads 34.47 kPa (5 psi). The system should
hold pressure for three hours.
�z After three hours, is the pressure re

z
Actuate the bolster seat control switch to the inflate position
until the gauge reads 34.47 kPa (5 psi). The system should
hold pressure for three hours.
z After three hours, is the pressure reading 32.41 kPa (4.7
psi) or more? No
GO to
F13 .
F13 CHECK THE SEAT BACKREST BOLSTER ADJUSTING
PAD FOR LEAKS z
Remove the in- line pressure gauge.
z Use a hand pump and inflate the seat backrest bolster
adjusting pad to 34.47 kPa (5 psi). The seat backrest bolster
adjusting pad should hold pressure for three hours.
z After three hours, is the pressure reading 32.41 kPa (4.7
psi) or more? Yes
INSTALL a new
bolster/lumbar pump and
solenoid module. REFER to
Lumbar Motor
. TEST the
system for normal
operation.
No
INSTALL a new seat
backrest bolster adjusting
pad. REFER to Lumbar Assembly . TEST the
system for normal
operation. F14 CHECK THE SEAT CUSHION BOLSTER ADJUSTING
PADS z
Visually inspect the seat cushion bolster adjusting pad.
z Is the seat cushion bolster adjusting pad damaged? Yes
INSTALL a new seat
cushion bolster adjusting
pad. REFER to
Lumbar Assembly . TEST the
system for normal
operation.
No
GO to F15 .
F15 CHECK AIR FLOW FROM BOLSTER COMPRESSOR
z
Disconnect the seat cushion bolster adjusting hose from the
connection at the seat pivot bolt.
z Actuate the bolster seat control switch to the inflate position
while feeling for air at the connection.
z Is air felt at the bolster motor hose connection? Yes
GO to
F16 .
No
INSTALL a new
bolster/lumbar pump and
solenoid module. REFER to
Lumbar Motor . TEST the
system for normal
operation. F16 CHECK THE SYSTEM FOR LEAKS
z
Reconnect the hose at the seat cushion bolster pivot bolt.
z Disconnect the seat cushion bolster adjusting hose at the
seat cushion bolster adjusting pad.
z Install an in- line pressure gauge on the hose.
z Actuate the bolster seat control switch to the inflate position
until the gauge reads 34.47 kPa (5 psi). The system should
hold pressure for three hours.
z After three hours, is the pressure reading 32.41 kPa (4.7
psi) or more? Yes
The system is operating
correctly. TEST the system
for normal operation.
No
GO to
F17 .
F17 CHECK THE SEAT CUSHION BOLSTER ADJUSTING
PAD FOR LEAKS z
Remove the in- line pressure gauge. Yes Klj . 14 ba
152003 Mustang Workshop Manual
18. 11. 2011file:///C:/Ford/2000 - 2004/tsocache/SHEF_5108/S3B~us~en~ ...

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