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8th May 2017, 22:12 | #1 |
Loves to post
MG ZT 190, Rover 75 CDTi, Honda VFR 750, Honda CB550F Join Date: Aug 2010
Location: Derby
Posts: 393
Thanks: 75
Thanked 36 Times in 28 Posts
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ECU Repair?
My car 1.8K recently started showing unusually high coolant temperatures (102 C) on my Intravee but the coolant level was fine and not excessively hot. It then started reading -128 c which is the same result as disconnecting the sensor. I tried a spare sensor but the problem returned after a few miles. I have checked the resistance from the ECU plug and it showed 2.7k ohms. No amount of twisting the sensor plug would change it. The sensor itself is 2.7k at room temperature. Putting the original back restored the high readings and it now sits at 127C again with the coolant system showing no signs of distress. A laser temperature sensor on the top hose read 60 C. Fitting a brand new sensor still reads 127C when warm. It seems my ECU is faulty, is there any way to program a spare unit to match my old one so the EWS recognises it? Could it be re-calibrated?
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