Hello,
Prior to my recent starter change my suspension was working perfectly. After the starter change the fault code says lost communication. “Suspension fault max speed 30mph”

I replaced the starter and it started right up no problem with no fault codes on the dash. It was dark, so I opted to disconnect the battery and leave it jacked up until the morning. 8 hours go by and I put everything back together and now I’m getting the red amber light (not flashing just solid red). It says suspension fault max speed 30 mph. I plugged in a diagnostic tool and it says lost communication. It is currently bottomed out and will not lift to normal height.

any insight would be greatly appreciated

 

Curious which diagnostic tool you used....it sounds like a cross articulation fault. Does the EAS raise back up when you command it?

 

I’m not sure which one it was. I had a mechanic have a look at it and he showed me the code. He tried checking fuses, and relays trying to rule out some issues.


When I push the button forward to raise it dings and says special programs not available.

haven’t tried to command it to lift any other way?

 

It shouldn't say special programs not available unless you try to select a special program via TR (the big rotary ****).

I guess I'd start with a hard reset (search on this forum) whereby you disconnect the battery cables and (electrically) connect them for a few minutes, then re-install.
Then try to raise and lower the EAS. This will rule out any compressor issues.
If your fault is RED and lowers your suspension only above a certain speed (usually freeway height) then it is likely a calibration issue If it's amber and comes with other goodies like HDC faults and special programs unavailable but goes away after an ignition cycle, it could be a brake light or the brake switch.

BTW how is your battery health?

 

Battery is a new one. I will do the reset. If I drive it will it correct on it’s own? Compressor does t kick on at all so will the reset fix this issue as well?

 

Reset won't fix it per se but at least temporarily clear it so you can assess the symptoms. Interested if the compressor will come on if called for during a non-faulted state.

Curious what other indications are present when the fault occurs. Is it Amber or Red? At what speed?

 

Ding and then the colors cycle to a solid amber red. I talked to a general tech and he said I should have not left my vehicle jacked up over night and should have disabled my suspension before doing that.


is there a diagnostic tool I can buy to read my suspension system and calibrate it myself? Clear errors or faults concerning the suspensions as well?

I’m convinced it’s an issue that can be fixed with a diagnostic tool.

 

The "general tech" is full of ****. Amber and Red are two different colors. They mean two different things, too. As I have advised you above, you need to get to a baseline state and then see what the symptoms are. Have you done a hard reset yet? Cross-articulation faults are fairly easy to fix. Requires a recalibration of the EAS. You can do this at a dealership (probably $150) or you can buy the IIDTool from GAP and do it yourself. The IIDTool is about $500 but it's worth every penny. If it's not a cross-art fault it could be a bad compressor and that is a lot more sinister. That is why I want to know if the compressor will fire up from a fault-free state.

 

I disconnected the ground terminal for about 5 minutes and then Reconnected. The amber red light is still the same.

Is this how you reset???

please enlighten me because I’m learning as I go. I’ve already replaced rotors, brakes, air bags, and starter pretty easily so I can get what you’re saying.

 

Well, I'd suggest disconnecting both battery cables, connecting them electrically using jumper cables (for example) and leaving it like that for about 10 min. Then reconnect and fire up the rig and see what happens.

Again, Red is NOT Amber. "amber red" is not a color. They are different and we need to know which one you see in order to diagnose. Can you take a photo and post it here?