Question about 2008 Jeep Compass

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My 2008 Jeep Compass won't start or crank. When hooked up to a scan tool, it says it can not connect to the computer. What could be causing this? It happened with no warning and the check engine light

We have replaced the ignition switch with no results.

Posted by Anonymous on


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Posted on Jan 02, 2017

  • 1118 Answers

SOURCE: 1998 jeep cherokee no power to ignition coil

chk. ignition switch, and fuses.

Posted on Feb 08, 2009

  • 642 Answers

SOURCE: ignition on jeep yj will not start engine. all

Before blaming the starter make sure the battery is fully charged. It should be around 13V.
Starter circuits for the most part operates in the following way. Turning the ignition key supplies power to a relay situated in the engine compartment which in turn activates the solenoid on the starter which powers the starter itself.
Make sure your vehicle is in Neutral(Manual gearbox) or Park(Auto box) Locate the starter motor. On the starter there is another cylinder like object called the solenoid. There is a thick red wire running from the battery connected to this. There is also a much thinner wire which activates the solenoid. To test the starter run a wire from the + on the battery to where the thin wire connects on the solenoid. (ignition must be off) This should activate the starter and turn the engine. If nothing happens the starter is probably at fault. Before removing the starter make sure that the engine is properly earthed as this could also give problems.
If the starter does kick in the problem is further "upstream" Most probable cause would be the relay. If you can locate it, replace since it is relatively cheap.
Starter repair is best left to the experts. Get a quote for a new starter before you have the old one repaired. You'd be surprised at how many times it turns out that replacement costs the same as repair.
Let us know if you've solved the problem.

Posted on Dec 10, 2009

  • 20 Answers

SOURCE: rain water leaked thru the

Does the vehicle have a sun/moon roof? If so, it is common for the drain tube to become plugged which causes the water to back up into the sun roof module. The water then spills over into the rails that run side to side and leaks into the passenger compartment. The low point of the roof rails being the interior light. Open the sun roof all of the way and look for the drain tube(s). They usually tap into one or more of the corners of the sun roof module and then follow the conture of the vehicle either to the front or rear and drain the water out near the wheelhouse area. You'll need to find some way to disconnect the tubes from the module and flush the debris out. It is usually tiny bits of dust or sand that will flush out quite easily. You have to watch out for a couple of things. Do not drop the tubes as they may fall into the channel of the vehicle, and, use very light water pressure when flushing. There may be other connections in the hose downstream, and you don't want to dislodge those connections.

Posted on Nov 22, 2010

Testimonial: "thank you very much, that is exactly what i was told at the dealer Jeep"

  • 84 Answers

SOURCE: how do you reset change

1. Turn the ignition switch to the ON position (Do not
start the engine).
2. Fully depress the accelerator pedal slowly three times
within 10 seconds.
3. Turn the ignition switch to the OFF/LOCK position.
NOTE: If the indicator message illuminates when you
start the vehicle, the oil change indicator system did not
reset. If necessary repeat this procedure."

Follow these instructions.

Posted on May 16, 2011

  • 37 Answers

SOURCE: Jeep Compass turns over, won't start

check for power at the fuel pump if no power check relay's fuses ect If you have power at the pump then most likely bad fuel pump.And yes they do quit just like that

Posted on Jun 07, 2012

Testimonial: "Thanks! We are picking up a multimeter to check it out!"

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wow no symptoms stated just the boring where is it...
but great question, names car and year, clearly
we've posted the full fsm online here 100s of times.
here we go again.
down load it, then type , (after opening it)
control F, the type compass.
i wonder if a compass car has compass , omg.
i have 2010 and have same book.
did you scan the PCM yet, i bet not.
and its guess what, telling why it fails right now.
see page 8M-6 in book FSM.
the dtc shows car needs degaussing,, now.... see?
and if that error happens the compass goes blank, RTM?

calibration, RTM
replacing first is "overthetop", why go there.
first are scans then tests.
or needs just a degaussing... (a tool)
page 27
"NOTE: In addition to the Universal Transmitter
operation the Electronic Overhead Module (EOM)
is responsible for some of the compass functions.
Anytime the EOM is replaced the compass variance
value must be set, (Refer to 8 - ELECTRICAL/
not only that the PCM can lose commmications with this OEM.
so not scanning all modern cars, is a road to doom.
why skip scanning the car first and checking fuses.?????

scan first
ask questions 2nd.
my motto.... and WIN

Dec 31, 2015 | 2008 Jeep Commander 5.7

1 Answer

2009 Jeep Compass won't crank. Any answers ?

but what transmission, ill guess automatic.
Check fuses first? always first !
Check engine light on,key on, no, fuses.....

does it crank in NEUTRAL? (it will (can), per opr. guide)
does it?
scan it yet to see if there are TRS switch errors>??
do jumper cable jumps work>? off a running car, AAA tow truck like?
yes, then the battery was dead, or discharged.
no? then key line is dead. if hot wiring starter fails.
if hot wiring passes , then the key line is dead. TRS switch.

got tools or just want wild guessing?
my guess is wild.
so jumper cable it and report.

Mar 14, 2015 | 2009 Jeep Compass

1 Answer

What is the exclamation mark over the D in the gear selector options?

scan it using a scan tool
see what it is.
all cars made.

Sep 23, 2014 | 2008 Jeep Compass Sport

1 Answer

How do you read engine codes

any scan tool , is best.
code reader are near useless, about equal to a trip to autozoned.
get a real scan tool and see it all, get one that can read
all factory Jeep codes.
i use an Innova 3160.

Aug 18, 2014 | 2008 Jeep Compass

1 Answer

How to reset check engine light on 2007 jeep compass limited

you need a scan tool pull code and then you can clear trouble codes. if cause of code not fixed check engine light will come back on.

Jul 11, 2014 | 2007 Jeep Compass Limited

1 Answer

Jeep wont start

that is stater failure, (not a part, a system of parts)
if it cant crank over, it will not start if transmission is A/T.
my m/t push starts and gravity starts.

the starter can fail to crank for a vast number of reasons.
at least.
battery dead, bad or weak ,or discharged
battery cable ends corroded, zero service.
starter bad. (the part)
key line dead.
shifter a/t switch bad "PRNDL", wiggle it and then try to crank in NEUTRAL. yes wiggle the shift lever as you CRANK.
alarm system cut outs, (non stock alarm?)
remote start bs, (no rant, ill not do that...)
wiring hack jobs by persons that are clueless.
bad wiring
bad grounds
it the starter case with a rubber hammer , smartly, cranks now?
check battery voltage as you crank, if it drops below 10v (11 is better)
the baTTERY IS weak or starter is shorted. ( i then whip out my ammeter,, and,,,,,, sure you have no tools.)

Dec 29, 2013 | Jeep Compass Cars & Trucks

2 Answers

My 2009 Compass won't start/crank; no communication with PCM but scanner will communicate with TCM and ABS module

Double check the fuses (Inside the car and on engine bay), there is a fuse for the OBDII linkageand sometimes it works together with other systems (Power Outlets, Stereo, Switch, etc). A bad PCM would also cause that but is not very likely.

Mar 26, 2013 | 2009 Jeep Compass

2 Answers

1997 Jeep Grand Cherokee keeps cutting off and won't start some times

I would start by going to an auto parts store and having them scan the computer for codes, even if the engine light is not on. i have heard about auto part stores saying they can not scan if light is not on. i am not sure if it is the scan tool they use or what but sometimes there could be a pending code where the computer is waiting to see the problem again before turning light on. if this is the case then ask them to scan it anyway or go to a shop and ask them to do it. the reason for this is that these trucks have crank sensor problems.

the next time is dies check for spark, remove a sparkplug wire and place a screw driver into the boot of the wire and place it near a ground, a metal surface and then have someone crank the engine and see if there is spark. if there is no spark or you got a code of the crank sensor then i would replace the crank sensor, but if you have good spark and truck will not start then try spraying starting fluid into throttle body and see if it starts and dies out if it does then fuel pump problem.

If you have a fuel pressure gauge then hook that up and crank engine and see if you have fuel pressure and how much.

I will say that this does sound like a bad crank sensor, it dies and then wont start for a while ...

Dec 29, 2012 | 1997 Jeep Grand Cherokee

1 Answer

My Compass does not start. How do I reset the computer ?

how do I reset my computer on my 2007 jeep compass

Apr 03, 2010 | 2007 Jeep Compass Limited

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