I have a 2004 jeep grand cherokee freedom edition. i am trying to figure out what remote starters are compatible and what bypass module, if any, i need.
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The security alarm and engine immobilizer are functions of the Body Control Module (BCM) and the ECM. You can't just pull fuses. When the battery goes completely flat, or is disconnected, you just need to reset the Security System which is done via the Remote Fob.
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You need a technician with a pro grade scan tool computer to check the modules and sensors. Diagnose, then repair or replace. The 'let's try replacing this' method of repair is expensive.
Clean the Throttle Body and MAF (mass air flow sensor), but my first thought because of the backfiring is an intermittent fault with the Crankshaft or Camshaft Position Sensors. The diagnosis will pinpoint the fault.
It sounds like the bypass module, or the key that you have in a universal bypass box is not programmed. When remote starting the vehicle check to see if the yellow key light starts flashing on. That would confirm my prognosis.
The security module is located in the dash behind the glove compartment. You cannot disconnect the security module without bypassing the starter wire. The system disarms by unlocking the front doors or tailgate with the key or using the remote key fob. The switches on the door latches are notorious for going bad on the grand cherokees. These switches are inside the doors attached to the lock cylinders and cost about 40 bucks at the chrysler dealership. You can also get a replacement remote fob on ebay but they are around 50 bucks and you will need the owners manual for the Jeep to program it.
Get the check engine light checked you need to figure out the codes. Could be low on tranny fluid. If rpms go up and only moves for a short distance at 15 mph. Could be tranny fluid.
the output of the transmitter needs to be checked.it is a rf type .
if not,the front end of the remote module is no good.
it is part of a module that controls alot of other functions.
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