It reads speed value from a sensor installed over rear differential.
the sensors, of many do no governing. they only show RPM, some car called VSS vehicle speed senors, the engine speed is via, the crank CMP sensor, this lets the PCM Govern the Cruise controller software and the idle speed controls, but you never stated the symptoms , nor what Govenor, functinon has issues.? so answers will be wild guessing. "transmission , speedometer, or cruise" pike one.?.
if confused log in to alldata.com and read, it's all there , the libertiy , the engine is a 2.4L Power tek or the V6 3.7L , 2wd/4wd options, the Sport model has cruise(speed) option. 5speed manual and 4speed automatic options,. so what car do you have.
the best posts start with, car options, and posting the symptoms and then asking what to do with this problem, etc. if there is a problem did you use a scan tool yet, to see which DTc error you have, ? if cruise is bad, that is normal on all newer car , if there are other errors being thrown (DTC'S) FROM THE PCM. SCAN IT. first.
cruise (LIBERTY SPORT) Drops out anytime the PCM thinks(Allen Turing) there is danger of vehicle over speeding, (toyota lawsuits make all this worse)
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SPEED OF WHAT, name IT.?
Why not say the symptoms first
there are many speed controls(govs) on cars.
so I cant guess.
engine rpm & (isc speed reg, gov.)
road speed, called cruise control.
TCM the automatic trans has many speed sensors
some have 1 others 3. and uses the engine speed sensors too
to shift. so what is wrong. first.
all speeds come from a sensor.
so...... ever seen a scan tool and see all that data live ?
get the FSM and read it.
or alldata.com and study that, its all there, every word and process.
ALLDATA OEM Auto Repair Information for Professionals
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SOURCE: jeep liberty 2002 air conditioning
please elaborate, does your inside fan still works? does your compressor clutch kicks in?...would you know if you have refrigerant in your system? if you can trace the hose from the compressor to the evaporator, you can see a plastic cap normally blue with a big letter "L" at the top, then it is the low side fitting, you can remove the cap and get a pin and press the pin at the center( be carefull, refrigerant might be present). if there is none, then you have a leak. u lost all of your refrigerant that is why the ac did not work. if you do have a big burst of gas as you press it, then it is not a refrigerant problem,
a lot more to be tackle as you help me diagnose your problem.
tnx
drcool
pls rate me..
SOURCE: 2002 LIBERTY OVERHEATING:
Mothers Jeep did the same thing. We changed the water pump and solve the problem. heater worked amazing after swap also!
SOURCE: 2002 jeep liberty interior fuse diagram
1-20amp-pwr outlet frt. 2-10amp-rear fog lights(export only)
3-15 amp-horn 4-10amp-hedlt low beam rt
5-10amp-hedlt low beam lft 6-20amp-bodycontrolmodule/pwr dr locks 7-spare 8-spare 9-10amp- rt pk lt /rt tail lt/trailer tow lt/cluster
10-spare 11-15 amp-flasher 12-15 amp-stop lts
13-10amp-bodycontrolmodule/cmtc/cluster 14-spare
15-10amp-pdc fuel pmp & auto shutdownrelays/skis
16-20amp-pwr outlet rear 17-15amp-rear wiper 18-20amp-radio choke relay 19-20amp-frt fog lts/trailer tow stop and turn lts
20-20amp-sunroof 21-spare 22-10amp-wiperswitch/frt and rear washer 23-10amp-lft park lt/lft tail lt 24-10amp-pdc blower motor relay 25-10amp-heatseatswitch/hvac controlhead/trailor tow battery charge 26-10amp-hedlt highbeam rt 27-10amp-hedlt highbeam lft
28-spare 29-15amp-heated seat module 30-10amp-heated mirrors/rearwindowdefrosterindicator 31-20amp-cigarlighter
32-10amp-radio/frtdoorlockswitches/bodycontrolmodule
33-10amp-skis/diagnostic connector 34-15amp-cluster/courtesy lts/radio/bodycontrolmodule/maplights/cmtc/underhood lt/vanity lts
35-spare 36-10amp-ignition run/start-orc/lft and rt siacm
37-10amp-ignition run only-orc 38-10amp-abs module/brake shift interlock solenoid 39-10amp-rear window defroster relay/flasher/backup lts
SOURCE: Liberty Jeep 2002 at what milage do I change the timing belt?
First does it have a belt ore a chain and most newer one recomend at like 60k ore 90. If got a chain it stretch and you will not get great gas milage but it will not break like a belt
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