Electronic Level Control (ELC)

CAUTION: When diagnosis or repair requires raising the vehicle on a hoist, it is important that the rear axle remains in the normal trim height position at all times. Therefore, the hoists should support the rear wheels or axle housing. When a frame contact hoist is used, two addition jacks stands should be used to support the rear axle in the normal trim position.

If both the suspension leveling system and the inflator system are inoperative, check first to see if the "ELC" fuse is in place in the vehicle fuse block before performing any other diagnostics. This 20 amp fuse is placed loose in the glove box by the assembly plant to prevent Electronic Level Control (ELC) system operation during vehicle shipment. This fuse also serves to protect the auto level control air compressor against damage due to excessive overload stall. The fuse is in the fuse block and functional, proceed with system diagnostic.