Ford 2003 Mustang Workshop Manual page 3677

psi) or more?
E11 CHECK THE SEAT BACKREST LUMBAR ADJUSTING PAD
FOR LEAKS
Remove the in-line pressure gauge.
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.
After three hours, is the pressure reading 32.41 kPa (4.7
psi) or more?
PINPOINT TEST F: THE POWER BOLSTER/LUMBAR IS
INOPERATIVE — DRIVER
F1 CHECK THE BOLSTER/LUMBAR COMPRESSOR
OPERATION
Actuate the bolster/lumbar seat control switches.
Does the bolster/lumbar compressor motor run?
F2 CHECK CIRCUIT (BK) FOR VOLTAGE
Disconnect: Bolster/lumbar pump and solenoid module.
Measure the voltage at bolster/lumbar pump and solenoid
module pin 1 (BK), harness side and ground.
Is the voltage greater than 10 volts?
F3 CHECK CIRCUIT (LG) FOR AN OPEN
Measure the resistance between bolster/lumbar pump and
solenoid module pin 2, (LG), harness side and ground.
Test Step
Yes
INSTALL a new lumbar
seat control switch.
REFER to Lumbar Control
Switch . 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.
Result / Action to Take
Yes
GO to F5 .
No
GO to F2 .
Yes
GO to F3 .
No
REPAIR the circuit. TEST
the system for normal
operation.
Yes
GO to F4 .
No
REPAIR the circuit. TEST
the system for normal
operation.