93ZJ - 4 wheel drive switch + bad coolant sersor

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Bogey Buster - 14 Apr 2007 01:39 GMT

Hi Folk,

In my 93 V8 ZJ, the following error messages flash in and out the VIC once a
while.

1, Service 4 wheel drive switch, and
2, bad coolant sersor

I don't notice if I have a 4 wheel drive switch?! I only have 4hi and 4lo.
Since they flash in and out, does it indicate a bad connection @ somewhere?

Any input is welcome.

Thanks in advance

Paul

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DougW - 14 Apr 2007 07:46 GMT

> Hi Folk,
>
[quoted text clipped - 7 lines]
> 4lo. Since they flash in and out, does it indicate a bad connection @
> somewhere?

You have the Quadratrack transfer case. Problem is the sensor is
internal to the xfr case. I'd remove/clean/reinstall the connector
first. It's an oval 4pin located on the transfer case. not too easy
to get at though.

On the bright side, the 4wd and coolant sensor errors are not
critical providing the range selection is correct, the fluid
has been changed regularly, and you keep an eye on the overflow
bottle so the level is between fill and add with the engine at
operating temp.

As for 2, clean the contacts on the sensor that is on the
coolant reservoir, it's likely a bit corroded.

Signature

-- DougW -- 93 ZJ 4.0 http://revbeergoggles.com
HESCO Supercharger - 300W IASCA Stereo - Edelbrock IAS Shocks
Gibson Exhaust - rear DCpower - custom gauge install - Stillen Rotors
Banks Header - and BEER, in the fridge!

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billy ray - 14 Apr 2007 18:19 GMT

>> Hi Folk,
>>
[quoted text clipped - 21 lines]
> As for 2, clean the contacts on the sensor that is on the
> coolant reservoir, it's likely a bit corroded.

If it is the same sensor used on the WJ... When I got the error I just
disassembled and cleaned it really well in the basement and reinstalled it.
Been working fine for almost 2 years now.

Sensor in the WJ fits into the expansion tank.
http://s112.photobucket.com/albums/n171/Billy_Ray_2006/Flush-n-Fill%20Kit/?actio
n=view&current=CoolantandTee.jpg

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DougW - 14 Apr 2007 18:59 GMT

>>> Hi Folk,
>>>
[quoted text clipped - 28 lines]
> Sensor in the WJ fits into the expansion tank.
> http://s112.photobucket.com/albums/n171/Billy_Ray_2006/Flush-n-Fill%20Kit/?actio
n=view&current=CoolantandTee.jpg

probably the same.
http://revbeergoggles.com/Fixes/sensor-coolant.jpg

Signature

DougW

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Bogey Buster - 17 Apr 2007 02:24 GMT

Hi Everyone,

Thank you for your input.

I did a throughout car wash last weekend. I also cleaned the connectors.

The error messages did not re-appear ... for the last short while. I still
keep my fingers crossed.

Thanks again

Paul

> Hi Folk,
>
[quoted text clipped - 13 lines]
>
> Paul

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DougW - 17 Apr 2007 02:36 GMT

> Hi Everyone,
>
[quoted text clipped - 4 lines]
> The error messages did not re-appear ... for the last short while. I
> still keep my fingers crossed.

My experience on the 93 is that most problems can be solved by
cleaning connectors. Especially the ABS light coming on when you
hit bumps. That's caused by the crappy location they chose for
the ABS computer. The connector accumulates road debris and
rain from the hood drain. Thankfully it's easy to clean.

Don't forget to keep the Idle Air Passage in the trottle body
clean. That causes rough idle.

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