Author Topic: CLT problems  (Read 5940 times)

Offline silverliner

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CLT problems
« on: October 18, 2010, 09:23:06 am »
Hi, CLT shows 154°C after powering up, it is a standard Bosch NTC (CLT in = EC36-14). I checked the wiring with NTC connected: 1.45kOhm@12°C, OK so far.
I am using 17points curve for calibrating.
Did I miss anything to configure with firmware 1.1.81? IAT (NTC) is working well.
I hope, it is no hardware failure.
But if so, is it possible to use the EGT-Sensor (not in use yet) instead for measuring the coolant temperature?
Thanks for helping

Offline mattias

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Re: CLT problems
« Reply #1 on: October 18, 2010, 09:40:20 am »
Why do you say you use the 17 point curve to calibrate the sensor, when it's obvious you have not calibrated it, as it gives false readings ?

1.45kOhm@12°C sounds like too low resistance at that temperature to be the standard sensor used on most "Bosch" engines.

Offline GintsK

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Re: CLT problems
« Reply #2 on: October 18, 2010, 10:17:32 am »
Just measure voltage on detached sensor connector. There must be 5V.
In your case it sounds like sensor signal wire is shortened to ground.

Offline silverliner

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Re: CLT problems
« Reply #3 on: October 19, 2010, 06:17:23 am »
Thanks GintsK, you put me in the right direction, I checked the wiring again and found the short-circuit, sometimes the simple things ;)
Now all values are plausible and I get a constant rpm-signal while cranking. Next will be the trigger-test in VemsTune…