How are Active Suspension System Air Compressor issues diagnosed?
If the air suspension is not receiving sufficient pressurized air, the air compressor will be tested for failure. First, the technician will test the air compressor electronically. They must understand if the compressor is receiving switched power, has ground, and whether the compressor motor is functional. If these are all found to be true, the compressor will need to be tested to find how much pressure it is creating. It is entirely possible for a compressor to run normally without creating air pressure. If the compressor does not function electronically or pneumatically when power, signal, and ground are present, it will be replaced.
How are Active Suspension System Air Compressors replaced?
Active suspension air compressors are connected to the vehicle both electrically and pneumatically. This means they must be disconnected from battery power, switched power, and air lines. Installation is the reverse of removal, and instruction should be followed to determine how to seal the air lines and if oil should be added to the compressor. It is important to note that some compressors are driven by the serpentine belt from the engine, but this is rare for most passenger vehicles. Also, in many cases, the compressor may be tucked away underneath the seat, trunk lining, or somewhere in the engine compartment, so referring to the service guide is necessary to locating the compressor for testing.
RepairPal Recommendations for Active Suspension System Air Compressor issues
Any time the air suspension system is opened, it should be purged of air before reclosing the system. This will help rid the system of moisture caused by humidity and condensation. Also, this will allow the technician to monitor for debris, and take action if needed.
What to look out for when dealing with Active Suspension System Air Compressor issues
When diagnosing any active suspension system, the suspension must be deactivated before raising the vehicle with a jack. When the vehicle is lifted, the active suspension will attempt to level itself if left on, and this may result in damage to the active suspension system, or unstable lifting with the jack. If deactivating the system is not possible, disable the compressor.
Can I replace the Active Suspension System Air Compressor myself?
Air compressors are not typically difficult to diagnose or replace, and the average DIY mechanic can handle the repair with the use of the service manual for the vehicle. It is important to understand how to properly seal and service pneumatic systems, and whether the compressor for that vehicle requires lubricating oil to be added. If any portion of the repair is unclear, or diagnosis is not completely certain, it is best left to a technician due to the high cost of parts.
