2005 Grand Cherokee not cranking after repair - JeepForum.com
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post #1 of 3 Old 06-15-2021, 01:51 PM Thread Starter
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2005 Grand Cherokee not cranking after repair

Gents I‘m desperately looking for help. I had to remove the right valve cover of my 2005 3.7L Laredo to check the lifters. For this I had removed the A/C comp, generator, ign coils, ign valves, intake manifold and much of the related wiring. After putting everything back the engine will not crank. The scanner shows U0100 and P657. Any idea what to check?
I‘m an experienced automotive electronic developer but lacking the Jeep diagnostic tools and wiring schematics. Hope somebody can help.
Greetings from Germany

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post #2 of 3 Old 06-15-2021, 01:59 PM Thread Starter
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One more thing: when trying to crank the instrument cluster shows: „check gauges“
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post #3 of 3 Old 06-16-2021, 08:55 AM
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Is doesn't turn over at all? Any clicking?

I'd remove and clean battery terminals and make sure battery is not dead.

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