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Unread 10-17-2002, 11:29 AM   #1
CSinnett
Registered User
 
Join Date: Oct 2002
Location: Charlotte
Posts: 2
Technical Question

Hi All,

I'm hoping one of you Jeep vets out there can help shed some light on a topic for me.

I have a 95 Grd Cherokee w/ the inline 6 cylinder. It idles rough, and has stalled in the past. The local dealership says its the Idle Air Control that's gone bad and is causing the problem.

When I run the self-diagnostic on the Jeep, I get codes 12 and 17.

I belive code 12 is:
"Direct battery input to PCM was disconnected within the last 50-100 key-on cycles. "

and code 17 to be:

"Engine did not reach operating temperature within acceptable limits. Engine does not reach 20º F. within 5 minutes with a vehicle speed signal."

Can anyone out there shed some light on what these two codes mean - and more importantly, what is required to fix them myself (if possible).

I can't tell if these codes are related to the IAC like the dealer says. What would be causing code 12 and 17?

Any help would be greatly appreciated. I'm hoping that I can do this work myself in the coming weeks.

Best Regards,

~ Charlie

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Unread 10-17-2002, 05:38 PM   #2
gcl97
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Join Date: Jun 2002
Location: , PA
Posts: 62
This is what I have found:

Code Diagnostic item
------ -------------------
17 Engine is cold too long

Check items: Engine coolant temperature sensor circuit
and connector / Engine coolant temperature sensor /
Thermostat

17 Closed loop temperature not reached (M/T)

Check items: Engine coolant temperature sensor circuit
and connector / Engine coolant sensor / Thermostat

good luck.
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Unread 10-18-2002, 06:57 AM   #3
CSinnett
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Join Date: Oct 2002
Location: Charlotte
Posts: 2
this is exactly what I was looking for - thank you very much for this.

I replaced the IAC valve last night and that seemed to rememdy the rough idle - but I haven't checked to see if it shows a different diagnostic code yet.

The car is getting up in miles though, and I'd like to be pro-active in replacing parts. Hopefully, the engine thermostat and coolant sensor related to code 17 isn't too difficult.

Thanks again - I do appreciate it.

~cs
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