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Author Topic: Immobilised Engine  (Read 2768 times)

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doubleducks

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Immobilised Engine
« on: June 10, 2015, 06:34:26 PM »
Hi,

Pretty much desperate for help!

My Dad's 2001 Jeep Grand Cherokee's engine has immobilized itself. We have hooked it to 3 different diagnostic machines, and each one has come up with no result.

We get to first stage ignition but there is no engine turnover and the dials do not move at all. It seems that all of the other electric work, e.g. door open notifications etc.

Please help!
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ivanidea

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Re: Immobilised Engine
« Reply #1 on: June 10, 2015, 10:44:59 PM »
Ignition switch out of sync?

My TJ has an intermittent problem with not starting, and sometimes, when it does start, I don't get radio/wipers/indicators.
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Current Jeep: 2021 Willys 2dr 3.6 Auto. Sarge Green + Tan Top.
Former Jeep (USA): 2016 Renegade 2.4L 75th Anniversary 4WD Auto.
Former Jeeps (UK): 2000 Cherokee 2.5TD Sport Manual, 2001 TJ Sport 4.0 Manual, 2008 Liberty 2.8CRD Limited Auto, 2011 JKU 2.5CRD Limited Auto.

LairdScooby

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Re: Immobilised Engine
« Reply #2 on: June 23, 2015, 12:25:36 AM »
Is it automatic? Try shifting from P to N and back again rapidly while holding the key in the start position if so. If the starter comes back to life then the inhibitor switch (Neutral Safety Switch) needs either adjusting or replacing.

Not sure if this bit will apply to the later models but there is a fuse in the PDC (underbonnet fusebox) that protects the starter relay on my '94 XJ Cherokee - if yours has this and it has blown it will prevent the starter from working.
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bigjeepzj

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Re: Immobilised Engine
« Reply #3 on: June 23, 2015, 07:34:40 AM »
 :iagree: the neutral safety switch is the first place to look. What engine do you have in it
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Bubba

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Re: Immobilised Engine
« Reply #4 on: June 28, 2015, 10:53:56 AM »
 :iagree: best first place to check
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trucks


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Mike Pavelin

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Re: Immobilised Engine
« Reply #5 on: June 28, 2015, 04:02:25 PM »
Pull the starter relay and jump the two larger terminals and see if it cranks (Make sure it's ion Neutral first)
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bgbazz

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Re: Immobilised Engine
« Reply #6 on: June 28, 2015, 04:38:49 PM »
Do we know if it's an auto or manual box yet?


Auto = possible NSS

Manual = possible clutch safety start switch. (pretty much the same thing, but in a different location).


Just my two bobs worth.
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Mike Pavelin

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Re: Immobilised Engine
« Reply #7 on: June 28, 2015, 08:30:10 PM »
They're all auto.
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bgbazz

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Re: Immobilised Engine
« Reply #8 on: June 29, 2015, 06:20:40 AM »
How strange!  I never knew that.  :017:
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