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Do you have the codes stored for the issue you are having?
I have several codes, in the ride level system I have a C1a30,C1a20, and C1130. I know this diagnosis may take a while, but if you are willing I will be glad to work with you.
These were air system codes. We replaced the rear airbags/springs and it seemed like it took a few minutes before the vehicle started raising, The pump is running and it seems like the rear are doing the proper thing, but the front doesn;t seem to be leveling. I may need to clear any of these codes and see if I get something current. My scan tool gives me a lot of info, and I do have a system print out of the repair manual, so I can identify the different components by the correct name. Maybe a refresher course of how all this works may be in order.
I am not sure how to check the ecu, I am thinking that I will clear codes, and see what happens. After we replaced the rear bags it seemed to take a long while for the system to wake up, I was worried about it, but now I get a message that says it is leveling slowly or something like that. How do you suggest I test the ecu? I can get some sensor readings and maybe that would be a clue?
Okay, I feel fairly confident that it is not an ecu issue, and would like to proceed from that taken for granted(for now). I have a recurring C1130 code, which I suspect may be related to the compressor pressure. I may need to look at which info would tell me what system/reserve tank pressure I am getting to the system. Again, the rear seems to be good, but the front is not going up. The compressor does run and I am thinking it may be cutting off only when it reaches a high temperature limit, not pressure limit.