20 Most Recent 2009 Jeep Grand Cherokee Questions & Answers

have the OBD read, sounds like problem with the chassis/suspension/drive train, OBD should give code for the fault

2009 Jeep Grand... | Answered on Jan 15, 2019

the book posted 300 times +++
click WK jeep
click HVAC< read.
click 8w chapter, read. its ALL THERE<


2009 Jeep Grand... | Answered on Mar 27, 2017

you failed to scan it. like 99% off all posts here do not do....
you can not fix cars, with no tools , no scan tools.
The ASD has the 3 second rule and if 1 to 8 things fail
in 3 seconds the ASD drops. both driving or cranking.
FOB, (you mean remote start":?) yes/no.

the car needs service, the operators guide told you that.
and it does. "check engine light" get car serviced, as 99.9% do.
if you have no tools why ask how to fix a complex system.?

how cold is your winter, we cant guess that. -50F?
if its warm out say 32F (that is warm) then my guess is
your engine thermostat is bad, they can fail in 7 years of service.
so says the maker of it and why.
if in Alaska and -50F, this be a different and more complex answer.
(park in a garage with engine block heater pulled in)

The Scans will show what is wrong
as will the keyon 3 times, key jive.


2009 Jeep Grand... | Answered on Dec 20, 2016

Do you know which cylinder is # 5? You will probably have to remove engine cover to see anything. If coil on plug ignition, one coil for each spark plug. on the spark plug coil in question, remove electrical connector from coil, remove hold down bolt from coil, you may have to twist coil to get boot loose from spark plug.
What is liter size of engine?

This is for 4.7 L engine. It appears jeep rwd has odd and even banks like GM and Chrysler. 1357 for driver side bank. 2468 from front to back on passenger side bank.

2009 Jeep Grand... | Answered on Nov 07, 2016

what are you saying.? (must be in UK)
no keys, the keybob is dead. have 2 fobs, is best.... got 2?
change the battery in it yet, CR2032 ?
all doors dead.?
or just the fob fails to open the rear hatch and the glass button
on the rear of car, right center for glass open is dead.?

try to tell what works on car too.
like can you drive car a night?
all else AOK????????

2009 Jeep Grand... | Answered on Apr 15, 2016

Ignition module, crankshaft position sensor , PCM - engine computer etc... your best bet is to take it to a ASE certified repair shop or the dealer > You have no idea of the complexity involved in the computer systems on this vehicle ! unless you want to replace part after part an not fix it !

2009 Jeep Grand... | Answered on Jan 10, 2016

replace the faulty reservoir or radiator
what is happening is that the radiator cap is not raising the pressure in the cooling system because of a leak in the system
the excess water from heating is being pushed out probably onto the ground through the leak
when the cooling system cools down , water is being drawn back into the radiator
probably find a crack in the radiator tank that opens under pressure but seal off as the pressure is lost

2009 Jeep Grand... | Answered on Oct 09, 2015

all else on car works perfectly (other shoe drops??????)
waring 1: no scan tool, you will fail (99%)
is battery fully charged to 12.6vdc rested or at 10v?
all 4 corners dead?
not working means dead?, flashes too fast/slow or dim? or they stick on? (5 modes to fail not counting L/R and haz)
do the hazards work? (prime evidence and not stated)
most cars before 2007 have fuse marked TURN.
but not this car... its not at all like older cars....
did you scan it first after the fuse tests? any PCM scan tool.?
2009 WK jeep
the FSM chapter 8L shows the huge list of errors the lamps can fail. DTC errors.
in fact 8 blinker codes, ! DTC errors,

there is no fuse, just for turns, (trailer lamps fuse 19)

read this excerpt from the FSM book.

The turn signal system operates on battery current received on a fused ignition switch output (run) circuit so that the
turn signals will only operate with the ignition switch in the On position. The hazard warning system operates on
non-switched battery current received on a fused B(+) circuit so that the hazard warning remains operational regardless
of the ignition switch position. When the turn signal system is activated, the circuitry of the left multi-function
switch and the FCM will cause the selected (right or left) turn signal indicator, front park/turn signal lamp, front side
marker lamp and rear tail/stop/turn signal lamp to flash on and off. When the hazard warning system is activated,
the circuitry of the hazard warning switch and the FCM will cause both the right side and the left side turn signal
indicators, front park/turn signal lamps, front side marker lamps and rear tail/stop/turn signal lamps to flash on and
off. The Front Control Module (FCM) can also activate the hazard warning system lamps.
end quote)

the module front control MFC, runs this
and it uses fuse 18 , if 18 blows the module goes off line and vast things fail and huge numbers OF DTCs store.
and fuse 27 MFC
MFC needs these fuses good.
keep in mind nobody has MFC internal schematics...so........

this module drives left and right side front and rear.
electronic drivers, not fuses.
the MFC is here.
the fuses are 12,13,18, 20,27 that power MFC.

25812039-lb3yimx2pwhstnjl4tgwffiq-2-0.jpg ground this end.

2009 Jeep Grand... | Answered on Aug 07, 2015

why not state what you are doing? name the JOB !
defeating safety features.?
the operators guide and fuse boxes are marked,
lost the guide? in the glove box ?
here RTM
the book is here

or use alldata.com for 15 bucks.
your call.
but if hacking there is no book covering that.

2009 Jeep Grand... | Answered on Jul 30, 2015

Yes the air pressure valve is possible to be leaking.

2009 Jeep Grand... | Answered on May 13, 2015

Your key fob is broken most likely and will need replaced at the dealer. The vehicle and new key will need to be there for programming. The security system is not reading the key.

2009 Jeep Grand... | Answered on Apr 22, 2015

the operators guide says, get it service.
did you mean ABS (?)
if ABS comes on we scan it.
and check fuse (test them)

2009 Jeep Grand... | Answered on Apr 13, 2015

The satelitte antenna may have failed or be shorted. Check the antenna connection at the back of the radio and base of sat antenna on roof. If tight special tooling is req'd for antenna wire testing and base testing and the vehicle should be taken to the dealer.

2009 Jeep Grand... | Answered on Mar 24, 2015

Spark plug gap should be on the emission control sticker under the hood

2009 Jeep Grand... | Answered on Feb 16, 2015

Yes, the cable is tangled internally. It only rewinds evenly with a load (such as a spare tire) on it! The assembly will have to be removed and disassembled to untangle the cable or replaced.

2009 Jeep Grand... | Answered on Feb 08, 2015

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