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ELC System Check

  1. Ensure height sensor and link assembly are in good condition before performing system operation test. Place vehicle on flat surface. Measure distance from ground to rocker panel in front of rear wheelwell opening. See Figure .
  2. Turn ignition on. Add 300-350 lbs. (136-159 kg) of weight to rear of vehicle. After 17-27 second delay, compressor should turn on and vehicle should start to rise. Vehicle should rise to within 3/4" (19 mm) of measurement made in step 1).
  3. Remove load from vehicle. After 17-27 second delay, vehicle should start to lower. Within 3 1/2 minutes, exhaust should stop and vehicle should be within 3/4" (19 mm) of measurement made in step 1). If ELC system does not function as specified, perform appropriate test. See ELC SYSTEM SYMPTOM TABLE  .
CAUTION: System leak test determines if a leak exists, and if leak is internal or external to compressor.
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