QuestionI had my engine replaced and now the ELC (electronic level control) system does not work. Is there a way to test for it? In the Chilton repair book it talks of "grounding the compressor test lead" to pressurize the ELC system, but does not say where that is. I also have no idea where the compressor is. Thanks.
AnswerWilliam,
First of all, I like to point out to people asking about the ELC system that it is NOT intended to permanently hold a large percentage of the rear weight of the car. In other words, if the car doesn't sit level without it, you REALLY have a problem with the springs being weak. The system is only there to level the car during temporary periods when you have extra weight in it.
That said, the compressor is under the car in the rear, kind of under the rear seat area. There used to be a test terminal but later models don't have it. Realistically, it only turned on the compressor but if the system didn't recognize a need for it to be on, the exhaust valve will be open and the rear will either not rise or it will not stay up.
First thing to do is check the fuses and then check under the car on the rear suspension to see if the level sensor link is connected properly. The sensor is mounted to the body, and there's a link from it to the suspension control are which allows the sensor to monitor the height of the body relative to the suspension. It's actually very common to have the link break or become disconnected from the control arm. Next, step up on the back of the car to simulate a load, and listen for the compressor to come on, may take up to 15-20 seconds due to a programmed in timer. If the compressor comes on but the car does not rise, look for an air leak in the tubing between the compressor and shocks, or leaking bladder at the shock itself. If the compressor does not come on, troubleshoot the sensor and compressor. If you need help with that, let me know.
