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I have a 2012 Cadillac Escalade ESV. The rear rear

Customer Question
I have a 2012...

I have a 2012 Cadillac Escalade ESV. The rear rear suspension stopped working, hit any hard bumps or RR tracks it bounces up and down like a rubber ball. There are no service or error lights coming on either.

Mechanic's Assistant: Do you have the trouble code? Do you have a code reader or scan tool?

There are no codes

Mechanic's Assistant: I'll pass this info along to the Mechanic so that he can get you a quick fix. Are you fixing your Escalade ESV yourself? What have you tried so far?

I am. The air compressor is working. I can't find the location of the suspension control module though. I have a second 2012 Escalade, it's the shorter model, but I can swap modules if needed to isolate the problem

Mechanic's Assistant: Anything else you want the mechanic to know before I connect you?

No that's it

Submitted: 5 months ago.Category: Cadillac
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Answered in 30 minutes by:
11/19/2017
Cadillac Mechanic: David Craig, Auto Mechanic replied 5 months ago
David Craig
David Craig, Auto Mechanic
Category: Cadillac
Satisfied Customers: 5,178
Experience: Owner/Mechanic at 3D Automotive
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Hi my name is ***** ***** I'll be more than happy to assist you, Please allow me a few minutes to review your information. Thank you.

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Customer reply replied 5 months ago
Thank you david
Customer reply replied 5 months ago
There are no codes David
Customer reply replied 5 months ago
Disconnected the - and + on battery for 30 minutes just in case. Problem exists
Cadillac Mechanic: David Craig, Auto Mechanic replied 5 months ago

what kind of scan tool do you have?

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Customer reply replied 5 months ago
I have no scan tool. It's not a leveling issue. The rear suspension shocks are not responding to bumps. All fuses are good. the compressor runs and shuts off ok
Cadillac Mechanic: David Craig, Auto Mechanic replied 5 months ago

are the rear shocks raising up?

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Customer reply replied 5 months ago
Let me check
Cadillac Mechanic: David Craig, Auto Mechanic replied 5 months ago

ok

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Customer reply replied 5 months ago
Starting it up, the compressor kick on about 8 to 10 seconds after the engine started and ran for about 3 to 4 seconds. I didn't see the shock move at all.
Cadillac Mechanic: David Craig, Auto Mechanic replied 5 months ago

ok, then you are going to have fault codes stored in the suspension control module. they do not turn on a check engine light. there are codes. guaranteed

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Cadillac Mechanic: David Craig, Auto Mechanic replied 5 months ago

so you need to have a shop/dealer level scan tool to interrogate the control module. otherwise its a guessing game

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Customer reply replied 5 months ago
What would the codes be for.
Customer reply replied 5 months ago
What I don't understand is, if there are any codes what it wouldn't show on any of the warning lights.
Cadillac Mechanic: David Craig, Auto Mechanic replied 5 months ago

theres no warning lights for suspension.

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Cadillac Mechanic: David Craig, Auto Mechanic replied 5 months ago

standby

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Cadillac Mechanic: David Craig, Auto Mechanic replied 5 months ago

it could be any of these

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Cadillac Mechanic: David Craig, Auto Mechanic replied 5 months ago

or any of these

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Cadillac Mechanic: David Craig, Auto Mechanic replied 5 months ago

sometimes you will get a service suspension message but theres no light

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Customer reply replied 5 months ago
I did see the module above the spare tire the other day. When I looked up the number on the module, it said it was a fuel pump control module. Is there a chance it could be the compressor. It runs for that short period of time bu I guess doesn't mean it's working?
Cadillac Mechanic: David Craig, Auto Mechanic replied 5 months ago

you were looking at the wrong thing

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Customer reply replied 5 months ago
What does it say for checking for air pressure from the compressor? Can I pop the air hose off the rear shock with it running?
Cadillac Mechanic: David Craig, Auto Mechanic replied 5 months ago

you can hear it

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Cadillac Mechanic: David Craig, Auto Mechanic replied 5 months ago

you can also remove it. i have done that

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Customer reply replied 5 months ago
It runs, I just don't know if it's making air. Did you mean removing the air hose?
Cadillac Mechanic: Dan, Technician replied 5 months ago
Dan
Dan, Technician
Category: Cadillac
Satisfied Customers: 25,693
Experience: Independent Shop Experience, 2 Year Automotive Diploma, & Access to Information Database
Verified

T​his most likely means the rear shocks have failed but could also mean the suspension control module has failed. Both of these problems can happen without setting any codes. I'd let dealer take care of this one, with scan tool they can activate the actuators in shocks while monitoring voltage. If voltage changes this proves shocks as problem if not this proves suspension control module as problem. Let me know if you have more questions, thanks.

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Customer reply replied 5 months ago
I have this 2012 esv and I have a 2012 regular. Can I switch the modules to see if thats the problem?
Cadillac Mechanic: Dan, Technician replied 5 months ago

They might need to be reprogrammed but it won't hurt anything to try. Let me know if you have questions, thanks.

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Cadillac Mechanic: Dan, Technician replied 5 months ago

Ever get problem figured out? Please do not forget to rate answer. Thanks.

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Dan
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