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[drmryan]

Hi there,

First post here and unfortunately a problem but hopefully an easy one?

I've got a '98 Grand Cherokee (says 98 on the V5 but it's on an R so it might be 97), we've not had it long. It drives fine, but a couple of minutes after starting up it shows 'Coolant Sensor Fault'. This goes off after a while. Car's not in limp mode, it doesn't seem to have any adverse effects but I'd like to sort it.

Any suggestions as to which sensor it is and where to get a new one other than a main stealer?

Cheers

Daz

[Dave69]

you might have to wait unfortunately as most of the regulars will be camped in a field taking crap as normal and getting severly intoxicated.

not sure on the GC but i would have thought the sensor measure just the temperature, does the dash temp guage work fine before and after the error message?

[jay140285]

If its not getting hot or using any coolant, then it could be the sensor that reads the coolant level in the expansion bottle.

[drmryan]

Jay, I think you might be right with the expansion tank sensor. Occasionally it says Coolant Level Low instead of the error, which it's not. Engine temp is fine and gauge reads fine too. Any suggestions for where I might be able to pick up a new one?

Daz

[ukturbo2000]

Dont panic, it's a common fault with the ZJ, it's just a bad solder joint in the vehicle information centre, you can either remove the screen and redo the solder joints on the circuit board or as i do, just ignore the message,

or you can fix it like :-

Unplug the VIC and take to the bench. Open it up (need torx bit). Get the circuit board out. On the connector - look for your pink with black stripe wire and match to the pin on the circuit board. Then look on the back and look at the solder joint. If you have a magnifying glass or good light - you'll probably see a bad solder joint (cracked at the connector pin). Its neighbours may be bad also. Use a soldering iron and reflow with a little new solder. Do the others while you are in there. Put everything back together and enjoy

[drmryan]

Ah I see. Thanks for the info, I'm not scared of a soldering iron so maybe I'll give that a go.

Daz