Air Replenishment Cycle

Approximately 40 seconds after the vehicle ignition switch is turned to RUN, the height sensor closes switches C and B for 3 to 5 seconds, operating the compressor. If this rotates the height sensor arm below the in-trim zone, the height sensor will then close switch C and A until the arm is back in the in-trim zone. This cycle ensures that the minimum system pressure of 55 to 97 kpa (8 to 14 psi) is replenished in the air shocks. The ARC is controlled by the height sensor and will not occur if the sensor arm position is above the in-trim zone, indicating that additional pressure is needed in the air shocks to raise the vehicle. In this case, the compressor runs for after a 7 to 14 second delay, and will run as long as needed.