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Home >> Toyota >> 2001 >> Sienna CE >> Repair and Diagnosis >> External Pages >> Different car >> Section 180 (Electronic Suspension) >> Component Tests >> Electronic Modulated Air Suspension

Electronic Modulated Air Suspension

WARNING: This page is about a different car, the 2003 Lexus LS 430, 2002 Lexus LS 430, and 2001 Lexus LS 430. However, it is still accessible from the selected car via links, so may be relevant.
  1. Check tires for proper inflation pressure.
  2. Check vehicle height. See VEHICLE HEIGHT  under ADJUSTMENTS.
  3. Start engine. Change height control switch from NORM to HIGH position. From operation of height control switch to start of compressor should be approximately 2 seconds. From start of compressor to completion of height adjustment should be 24 to 40 seconds. The amount of change in the vehicle height should be .39-1.18 inches (10-30 mm).
  4. With vehicle in HIGH position, change height control switch to NORM position. From operation of height control switch to opening of exhaust valve should be approximately 2 seconds. From opening of exhaust valve to completion of height adjustment should be 24 to 40 seconds. The amount of change in vehicle height should be .39-1.18 inches (10-30 mm).
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