Radio, top, cooling fan and fuel gauge doesnt work
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Re: Radio, top, cooling fan and fuel gauge doesnt work
I'm a moderator over on the LOTUSELANCENTRAL forum. Although I still have my privileges I haven't posted for 4 or 5 years. I had 3 of those cars over a span of 11 years and knew every nut & bolt that existed. Reading your posts such as in this thread let's me know I'm starting over again at the bottom of a very tall hill! It sure is easier though, than before the internet came along.
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Re: Radio, top, cooling fan and fuel gauge doesnt work
NO, it does not. But very narrow pulses are sent from the ECU to the FCM and the FCM must respond with an "answer pulse" to keep the dash light off.
If the ECU wants the fan to run (say because you turned the A/C on), it will widen it's pulses quite a bit, this tells the FCM to run the fan.
If the ECU wants the fan to run (say because you turned the A/C on), it will widen it's pulses quite a bit, this tells the FCM to run the fan.
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