Ford 2003 Mustang Workshop Manual page 3676

Is the resistance less than 5 ohms?
E6 CHECK THE LUMBAR ADJUSTING SYSTEM
Actuate the lumbar seat control switch to the inflate position
while observing the seat backrest lumbar adjusting pad.
Did the seat backrest lumbar adjusting pad inflate?
E7 CHECK THE SEAT BACKREST LUMBAR ADJUSTING PAD
Visually inspect the seat backrest lumbar adjusting pad.
Is the seat backrest lumbar adjusting pad damaged?
E8 CHECK AIR FLOW FROM LUMBAR COMPRESSOR
Disconnect the seat backrest lumbar adjusting hose from the
lumbar motor.
Actuate the lumbar seat control switch to the inflate position
while feeling for air at the motor connection.
Is air felt at the lumbar motor hose connection?
E9 CHECK THE AIR FLOW FROM THE LUMBAR SEAT
CONTROL SWITCH
Reconnect the hose to the lumbar motor.
Disconnect the seat backrest lumbar adjusting hose at the
lumbar seat control switch.
Actuate the lumbar seat control switch to the inflate position.
Is air felt at the seat backrest lumbar adjusting hose?
E10 CHECK THE SYSTEM FOR LEAKS
Reconnect the hose at the lumbar seat control switch.
Disconnect the seat backrest lumbar adjusting hose at the
seat backrest lumbar adjusting pad.
Install an in-line pressure gauge on the hose.
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.
After three hours, is the pressure reading 32.41 kPa (4.7
Yes
GO to E10 .
No
GO to E7 .
Yes
INSTALL a new seat
backrest lumbar adjusting
pad. REFER to Lumbar
Assembly . TEST the
system for normal
operation.
No
GO to E8 .
Yes
GO to E9 .
No
INSTALL a new lumbar
motor. REFER to Lumbar
Motor . TEST the system
for normal operation.
Yes
GO to E10 .
No
INSTALL a new seat
backrest lumbar adjusting
hose. TEST the system
for normal operation.
Yes
The system is operating
correctly. TEST the
system for normal
operation.
No
GO to E11 .