F 250 4WD Pickup V8-5.4L SOHC VIN L (1999)
1. Access the air suspension diagnostic connector behind the RH cowl side trim panel.
2. Turn the air suspension switch to the ON position and the ignition to the Key On Engine Off (KOEO) position. Use Super STAR II Tester
plugged into the air suspension diagnostic connector to perform the function test. Set Superstar II Tester to the EEC-IV/MCU mode; also set it to
the FAST mode. Press Superstar II Tester button to the TEST position; DTC 10 will be displayed. Within two minutes, DTC 12 or 13 will be
displayed. After DTC 12 or 13 is displayed, release the Super STAR II Tester button from the HOLD position. Wait at least 20 seconds and then
press the Super STAR II Tester button to the TEST position. Within 10 seconds, the following DTCs will be displayed in order:
3. WARNING: The electrical power to the air suspension system must be shut off prior to hoisting, jacking or towing an air suspension
vehicle. This can be accomplished by turning off the air suspension switch located in the RH kick panel area. Failure to do so may result
in unexpected inflation or deflation of the air springs which may result in shifting of the vehicle during these operations.
NOTE: Disconnect Superstar II Tester after deflation is completed.
Within four seconds after DTC 23, 24 or 25 is displayed, depending on which air spring is to be deflated, release the Super STAR II Tester to the
HOLD position. After deflation, turn the ignition to the OFF position.
Remove the wheel and tire assembly.
4. Remove the air line from the solenoid valve.
1. Depress the red plastic retaining ring.
2. Pull the air line out of the solenoid.
