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Any help would be greatly appreciated -
Temperature gauge on dash displays overheating once car is up to temperature. I have installed an aftermarket temperature sensor on upper coolant hose to verify that it isn't actually getting too hot (hovers around 90C).
Have replaced ECT sensor and checked all wiring to and from dash/sensor/grounds. Sensor has resistance of approximately 55-60 Ohms when at 90C - this also matches a test with the sensor out of the car in a pot of 90C water, along with the 50C test in the service manual.
However, as a test, when swapping out the sensor for a normal resistor of equal value, 55 Ohms, the gauge shows a normal temperature half way up.
I'm getting just over 14V to the fuel gauge's positive terminal, as well as a solid ground and sensor connection. The output from the gauge to the sensor is around 12V with engine running.
Weirdly, the gauge will display correctly with the car not running - it will start to rise slowly from middle position to hot after a few seconds when I hear a relay kick over and the power to the back of the gauge climbs from 12V to 14V.
It will also display correctly if the dash is independently powered from a separate 12V source (10V to sensor). However I don't see any form of a voltage regulator on the wiring schematics to indicate the dash should only be seeing 12V at all times.
Once again - any help would be greatly appreciated.
The actual pointer on the gauge is possible to put on there in the "wrong" position. you could take a look at a dash picture from another 2002 Jimny and see if yours is off.
www.bigjimny.com/forum/8-my-jimny/61472-...kuza?start=84#203590
Here you can see when I swapped clusters (for a totally different reason) how the temp gauge and the other pointers got a bit off on the lower picture. Or they where off on the upper picture, I dont remember. Moved them around a bit on the old dash I think, but anyhow they work fine now.
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