Question about 1994 Jeep Grand Cherokee
Having problem with anti theft at same time. remote doesn't help nor using key in door' drivers or pasenger
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Posted on Jan 02, 2017
Assuming I understand your problem correctly, it sounds as if the car will only start once the check engine light comes on. The check engine light is controlled by the PCM (powertrain control module; or computer) which is also responsible for basically all engine operations including fuel delivery, ignition, emissions, and so on. If this light is not coming on, it means that the computer is not getting power. If the computer is not getting power then it won't start. The fact that you hear the relays click on when the light comes on is another indicator the the computer is not getting power as it also supplies power to the ASD (Automatic Shutdown Relay) which in turn supplies the power to the fuel and ignition systems. Check the ASD relay located in the power distribution center, if it is the same relay number as another un-important system, then swap it out to see if that helps. Make sure the plugs going into the computer are tight. The delay in the power going to the PCM sounds like a stuck relay, have someone tap the relays when the light is off to see if comes on. It is also possible that the PCM itself is failing.
Posted on Dec 16, 2008
You will need an OBD (onboard diagnostics) handset to read and or reset the codes. It would be good to know why the lamp came on to aviod and break downs possible in your future. They are available in any automotive store or even the auto section of many major Dept. stores. they generally include a code book or sheet to decode the reason for the light coming on. you may not be able to reset the light with out resolving the issue causing it to come on.
Posted on Apr 13, 2009
It is likely one of your battery cables loose. Same thing just happened to me today. What you need to do is first lock the doors, and close them. Then you need to disconnect, and reconnect the battery cable, then if the security lights still blink you must use your key to unlock the door, then it should stop blinking, and start just fine.
Posted on Jun 02, 2009
SOURCE: 2000 Jeep Grand cherokee Laredo
sounds alot the the pcm it controls the fuel pump and ign system but the anti theft would keep it from starting because the key has a transponder in it programmed for that vehicle and that would kill all ign if triggered
Posted on Sep 27, 2009
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