1999 Jeep Grand Cherokee failure codes

Tiny
TNEWBOLDS
  • MEMBER
  • 1999 JEEP CHEROKEE
  • 6 CYL
  • 4WD
1999 jeep grand cherokee won't start. A friend brought his diagnostic computer over. It did NOT show codes is said the following as he scrolled through the screens -
comm failure or no controlelr available,
jeep & truck engine message not rec'd,
EMS status malfunction,
transponder communication malfunction,
matured malfunction present,
serial link internal malfunction.
I'm positive there were no codes, just the above. Help please!
Monday, August 15th, 2011 AT 11:27 PM

4 Replies

Tiny
RASMATAZ
  • MECHANIC
  • 75,992 POSTS
What is it doing? Cranking over and will not start or just won't crank at all/nothing when you turn key to cranking position.
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Monday, August 15th, 2011 AT 11:35 PM
Tiny
TNEWBOLDS
  • MEMBER
  • 3 POSTS
It turns over but won't start.
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Monday, August 15th, 2011 AT 11:42 PM
Tiny
RASMATAZ
  • MECHANIC
  • 75,992 POSTS
https://www.2carpros.com/articles/car-cranks-but-wont-start

Get a helper disconnect a sparkplug wire or 2 and ground it to the engine atleast 3/16 away from ground-have helper crank engine over-do you have a snapping blue spark? If so-you have a fuel related problem, Do you hear the fuel pump come On when you turn key on? If not check fuel pump fuse and fuel pump relay if okay-check the fuel pressure to rule out the fuel filter/fuel pump/pressure regulator and listen to the injector/s are they pulsing or hook up a noid light. No snapping blue spark continue to troubleshoot the ignition system-power input to the coil/coil packs,coil's resistances,cap and rotor,distributor pick-up coil, ignition control module, cam and crank sensors and computer Note: If it doesn't apply disregard it and keep testing
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Monday, August 15th, 2011 AT 11:45 PM
Tiny
COCHOA
  • MEMBER
  • 1 POST
That means your car key transponder receiver unit aint working correctly. Thats the part which reads the chip from your key. It is located in the steering column. You'll need to change it. Symptoms to confirm this:
car wont start but will crank.
Temperature, gas, oil pressure and battery gauges wont open
on top left dash there will be an indicator of a key with a cross line.
Cheers
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Monday, October 17th, 2011 AT 9:36 PM

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