Security system

2001 JEEP GRAND CHEROKEE
165,000 MILES • 4.0L • 6 CYL • 4WD • AUTOMATIC
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TAMMY WITHROW
  • MEMBER
  • 1 POST
Last night anti-key popped on. Now it will run for five seconds​ then turn off. I already disconnected negative cable. I also changed the security fuse. And still have same problem. What more can I do?
Jun 28, 2017 at 8:19 AM
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STEVE W.
  • ✓ASE Certified Mechanic
  • 15,200 POSTS
  • ASE Certified Mechanic
That description fits the anti-theft module not being able to read the key. There are a few pieces that control that. Most are not DIY friendly because you need a scan tool to be able to "see" what the system is doing.
It is a fairly common problem but without the scan tool you could swap some costly parts and still not repair it.
Jun 28, 2017 at 8:48 AM
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