Flow of Diagnosis

When performing system inspection, ensure vehicle is unloaded, and do not enter or exit the vehicle.
1. Start the engine, then adjust vehicle to its normal height by setting the height control switch to the Normal position.
2. Take time measurements as follows:
a. Time from High to Normal position, when air suspension solenoid valve closes, should be 10-20 seconds.
b. Running time of compressor, after height control switch is pushed, should be 80-150 seconds.
c. Time from Normal to High position, when rear air suspension solenoid valve closes, should be 10-30 seconds.
3. Proceed to Diagnosis By Symptom. Symptom Related Diagnostic Procedures