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Instrument Cluster goin on & off, but now quite - but vehicle still moves quietly

Tiny
SIBUSISO
  • MEMBER
  • 2002 JEEP LIBERTY
  • 127,381 MILES
Several tests were done on the vehicle. The cluster was found to be working fine.
All cluster cables were tested and found to be sound and fine.

I removed the negative battery cable overnight and the following morning, the cluster was on for a while but went on/off again.
Could it be the PCM?

Thank You
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Thursday, January 12th, 2012 AT 2:25 PM

10 Replies

Tiny
RASMATAZ
  • MECHANIC
  • 75,992 POSTS
Do you have a check engne light?

Hard to say cluster is operational -might want to reflash the computer and see what happens
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Thursday, January 12th, 2012 AT 2:58 PM
Tiny
SIBUSISO
  • MEMBER
  • 6 POSTS
No check engine light does not appear.

I checked with the dealer and wants me to book in for the car, and they charges $60 [500 Rands] per hour. The car will spend a day there [almost 8 hours] and I'll have to fork out $480, which I'll have in the US for a new PCM. They insist that I bring the car, which I will not do. Please help in any way possible
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Friday, January 13th, 2012 AT 10:31 AM
Tiny
RASMATAZ
  • MECHANIC
  • 75,992 POSTS
Could be grounding and loose connection
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Friday, January 13th, 2012 AT 12:22 PM
Tiny
SIBUSISO
  • MEMBER
  • 6 POSTS
They were all checked. All cables checked, found to be working well. Connections were redone perfectly. Cables were traced up to the PCM. The code retrieved was P1687 - No cluster communication bus.
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Friday, January 13th, 2012 AT 12:27 PM
Tiny
RASMATAZ
  • MECHANIC
  • 75,992 POSTS
Have the PCM tested
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Friday, January 13th, 2012 AT 5:54 PM
Tiny
SIBUSISO
  • MEMBER
  • 6 POSTS
Thanks - I'll do so.

Is there a way to do it myself - DIY type of diagnosis
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Tuesday, January 17th, 2012 AT 6:51 AM
Tiny
RASMATAZ
  • MECHANIC
  • 75,992 POSTS
Take it to the dealership
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Tuesday, January 17th, 2012 AT 12:10 PM
Tiny
SIBUSISO
  • MEMBER
  • 6 POSTS
OK - I have no choice but to take it through.
I thought my basic auto electrical knowledge will be handy. I'll make a booking soon.
Thanks
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Tuesday, January 17th, 2012 AT 12:19 PM
Tiny
CJ MEDEVAC
  • MECHANIC
  • 11,004 POSTS
SEE MY ANSWER ON THIS POST

https://www.2carpros.com/questions/1997-jeep-wrangler-wrong-electrical-stuff

PRETTY MUCH ALL REALLY SIMPLE DIY STUFF YOU CAN TRY, BEFORE TAKING IT TO THE STEALERSHIP

THE MEDIC
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Tuesday, January 17th, 2012 AT 2:01 PM
Tiny
SIBUSISO
  • MEMBER
  • 6 POSTS
Thanks.
I checked the other post. You right, the battery was changed a few months ago - maybe then the PCM was shocked.
I'll have it tested and have it replaced when I get some $$$
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Tuesday, January 17th, 2012 AT 2:13 PM

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