Chassis System Failure after using iCarSoft 3.0
#1
Track Day
Thread Starter
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Hello everyone,
Today, after reading out / clearing some fault codes with my new diagnostics tool iCarSoft 3.0 (previously used iCarSoft 2.0) I now continuously get the red "Chassis System Failure" message and the ride height lever + PASM mode buttons on the middle console don't light up anymore.
This happened while trying some new diagnostics features such as read accumulator air volume etc. which kept giving resulting in Chassis System Fault / Failure prompts, which were easily cleared by turning the ignition off and back on. At some point though the diagnostics said to check if the device was plugged in properly and if the ignition was on, while this was the case and all other car features/modules were still listed. But after this the "Level control module" option didn't show up as a feature neither during the quick scan or while manually selecting the LCM option in the diagnostics list. It kept saying "not fitted", as if there's no communication with the LCM or as if my there's no Air Suspension or PASM fitted (?). Disconnecting the diagnostics tool and removing key etc. made no difference and the "Chassis System Failure" message now always appears after inserting the key to ignition pos. 1 or when starting up. My car's ride height seems to remain steady at the normal ride height while it's parked. The system wasn't leaking / losing pressure, and was working fine before this, i.e. the suspension was easily raised and lowered between the Low setting and Off Road High.
I checked the big orange fuse 40A on position 56 and it is intact.
The reason I connected the diagnostics tool was that I got a Check Engine Light earlier yesterday on my drive out to the desert. The engine ran smooth nonetheless and no low fluids or hight temps etc. I cleared the codes P000C, P1572 and P0599. Meanwhile I noticed the car's throwing more fault codes, for AC, Passenger Front door not connecting, PSM not connecting (not PASM), although when driving all of these functioned well. So it's either an electrical gremlin or coincidence. But i'm at a loss here. Main thing right now is to figure out how to activate, recognize or revive my Air Suspension so that my car doesn't seem to think it's not existent.
Thanks!
Namdar
Today, after reading out / clearing some fault codes with my new diagnostics tool iCarSoft 3.0 (previously used iCarSoft 2.0) I now continuously get the red "Chassis System Failure" message and the ride height lever + PASM mode buttons on the middle console don't light up anymore.
This happened while trying some new diagnostics features such as read accumulator air volume etc. which kept giving resulting in Chassis System Fault / Failure prompts, which were easily cleared by turning the ignition off and back on. At some point though the diagnostics said to check if the device was plugged in properly and if the ignition was on, while this was the case and all other car features/modules were still listed. But after this the "Level control module" option didn't show up as a feature neither during the quick scan or while manually selecting the LCM option in the diagnostics list. It kept saying "not fitted", as if there's no communication with the LCM or as if my there's no Air Suspension or PASM fitted (?). Disconnecting the diagnostics tool and removing key etc. made no difference and the "Chassis System Failure" message now always appears after inserting the key to ignition pos. 1 or when starting up. My car's ride height seems to remain steady at the normal ride height while it's parked. The system wasn't leaking / losing pressure, and was working fine before this, i.e. the suspension was easily raised and lowered between the Low setting and Off Road High.
I checked the big orange fuse 40A on position 56 and it is intact.
The reason I connected the diagnostics tool was that I got a Check Engine Light earlier yesterday on my drive out to the desert. The engine ran smooth nonetheless and no low fluids or hight temps etc. I cleared the codes P000C, P1572 and P0599. Meanwhile I noticed the car's throwing more fault codes, for AC, Passenger Front door not connecting, PSM not connecting (not PASM), although when driving all of these functioned well. So it's either an electrical gremlin or coincidence. But i'm at a loss here. Main thing right now is to figure out how to activate, recognize or revive my Air Suspension so that my car doesn't seem to think it's not existent.
Thanks!
Namdar
#2
RL Community Team
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@Namdartje With seemingly unrelated error codes, the first question to ask is: "how old is your battery?"
An old or weak battery can cause spurious error codes.
An old or weak battery can cause spurious error codes.
#4
RL Community Team
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It's not your battery.
Your tester did not return the system out of diagnostic test mode, which it goes into when you're messing with stuff. Find where that function is, and return the Level Control module out of diagnostic mode.
Your tester did not return the system out of diagnostic test mode, which it goes into when you're messing with stuff. Find where that function is, and return the Level Control module out of diagnostic mode.
#5
Track Day
Thread Starter
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@Namdartje With seemingly unrelated error codes, the first question to ask is: "how old is your battery?"
An old or weak battery can cause spurious error codes.
An old or weak battery can cause spurious error codes.
#6
Track Day
Thread Starter
#7
Track Day
Thread Starter
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Unfortunately the LEC (Level Control) now doesn't show up in the Quick test or Auto scan lists = where I need to be in order to enter those diagnostics submenus. And in the Control Unit list where I see all the Cayenne options (not just those fitted on my car) it says not fitted and consequently doesn't give me any options to enter the LEC menu as it thinks it's not fitted.
Ironically enough when performing the Quick test where it scans all the car's fitted options for faults etc. I do see a split second of LEC Scanning up to 44/46% and then it vanishes, without being featured in the results list... So somehow it does pop up, but diagnostics cycle isn't completed and thus dismissed (?). See image.
![](https://cimg7.ibsrv.net/gimg/rennlist.com-vbulletin/1440x1900/icarsoft_3_0_quick_test_365aff8931865b2a4a54fdaad4563b0cec7d5872.jpg)
![](https://cimg5.ibsrv.net/gimg/rennlist.com-vbulletin/1296x1728/icarsoft_3_0_not_fitted_e668f41b000a3730329f41d769cbb9a9866f7853.jpg)
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#8
Track Day
Thread Starter
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After disconnecting the electric connectors to the PASM / Air Suspension Control Module behind the right side trunk panel, the LEC popped up again in my Quick List, Auto Scan and Manual Selection. Running the diagnostics shows no error codes and Height Adjustment is apparently 'Adjustable', However when checking the Air Suspension status in the submenu it gives me one error code: "000001 Active - Commissioning not complete". When selecting the option "Unlock Commissioning" and start it simply gives back "fault" / "not completed".
Does this mean my air suspension module has to be encoded again? Should I take it to a Porsche or Air Suspension specialist? It doesn't seem like something is defect, but like some programming/software flaw.
Also i'm still getting the red "Chassis System Failure" prompt and the lights on the PASM and Ride Height selectors are still off...
Does this mean my air suspension module has to be encoded again? Should I take it to a Porsche or Air Suspension specialist? It doesn't seem like something is defect, but like some programming/software flaw.
Also i'm still getting the red "Chassis System Failure" prompt and the lights on the PASM and Ride Height selectors are still off...
#9
Rennlist Member
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Curious, did you update your icarsoft before using it? Probably a long shot, but likely won't hurt to have it on the latest version in case you're experiencing some sort of bug in the diagnostics module.
#10
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#11
Track Day
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Thanks, good point. I received the device last week so figured it's pretty up to date. Will have to find a PC (no updates for Mac) and try updating it.
#13
Instructor
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This is why i'm hesitant to start messing with my airsuspension with icarsoft. The buttons are there but do I want to press them.
Keep us updated! Hopefully it won't need coding.
Does your car still lift / level or is the air dead?
Keep us updated! Hopefully it won't need coding.
Does your car still lift / level or is the air dead?
#14
Track Day
Thread Starter
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Latest update. I went to an Air Suspension specialist here in Los Angeles, and his programmer guy couldn't reprogram my air suspension and noted the module might have gotten corrupted ("fried").
However, after several attempts afterwards and restarting the iCarSoft the option to Commission the Air Suspension worked and the system came back online. Performing perfectly as if nothing had happened.
I don't know why the same attempt previously didn't work, but in the end I got it to work again...
However, after several attempts afterwards and restarting the iCarSoft the option to Commission the Air Suspension worked and the system came back online. Performing perfectly as if nothing had happened.
I don't know why the same attempt previously didn't work, but in the end I got it to work again...
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TyreReviews (08-28-2023)
#15
Pro
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Latest update. I went to an Air Suspension specialist here in Los Angeles, and his programmer guy couldn't reprogram my air suspension and noted the module might have gotten corrupted ("fried").
However, after several attempts afterwards and restarting the iCarSoft the option to Commission the Air Suspension worked and the system came back online. Performing perfectly as if nothing had happened.
I don't know why the same attempt previously didn't work, but in the end I got it to work again...
However, after several attempts afterwards and restarting the iCarSoft the option to Commission the Air Suspension worked and the system came back online. Performing perfectly as if nothing had happened.
I don't know why the same attempt previously didn't work, but in the end I got it to work again...