Air Spring Filling

WARNING: WHEN INSTALLING DEFLATED REAR SPRING ON THE VEHICLE, LOWER THE HOIST PROGRESSIVELY AS REQUIRED. TO PREVENT PERSONAL INJURY, DO NOT APPLY ANY LOAD TO THE SUSPENSION UNTIL THE REAR SPRING HAVE BEEN INFLATED FOR AT LEAST 90 SECONDS.

1. Support frame so rear wheels are off ground with no load applied to rear suspension.
2. Air suspension switch must be ON.
3. Ignition switch must be in RUN position. A battery charger should be connected to battery to reduce battery drain.
4. Fold back RH luggage compartment trim panel carpet and connect Rotunda Super Star II Tester 007-0041 B or equivalent, to air suspension test connector.
5. Set Super Star II tester to EEC-IV/MCU mode. Also set Super Star II tester to FAST mode. Release Star tester button to HOLD (up) position and turn tester ON.
6. Press Star Tester button to TEST (down) position. A DTC 10 will be displayed. Within two minutes a DTC 13 will be displayed. After DTC 13 is displayed, release tester button to HOLD (up) position, wait two seconds and press tester button to TEST (down) position. Ignore any DTCs displayed.
7. Release tester button to the HOLD (up) position. Wait at least 20 seconds, then press tester button to the TEST (down) position. Within 10 seconds, the following DTCs will start to be displayed in the order shown:
DTC Description
23 Vent Rear
26 Compress Rear
31 Cycle Compressor On and Off Repeatedly
32 Cycle Vent Solenoid Valve Open and Closed Repeatedly
33 Cycle Spring Solenoid Valves Open and Closed Repeatedly
8. Within four seconds after DTC 26 is displayed, release tester button to the HOLD (up) position. (Waiting longer than four seconds may result in Functional Test 31 being entered.) The air compressor will fill the air springs with air as long as the test button is in the HOLD (up) position. To stop filling the rear spring, press the tester button to the TEST (down) position.

NOTE: It is possible to overheat the air compressor during this operation. If the air compressor overheats, the self-resetting circuit breaker in the air compressor will open and remain open for about 15 minutes. This allows the air compressor to cool down.

9. To exit Functional Test DTC 26, disconnect the Star tester and turn the ignition switch OFF.