Tacho stopped working
Posted: |April 25th, 2013|, 6:36 am
My tacho suddenly stopped working last year after a heavy rain.
I see the speed and other LEDs are ok, but tacho gauge is at zero no matter what the RPM is.
I think the MCU is allright because there are no problems with how the engine works (and it needs the RPM reading to work properly).
During the winter I have opened the dashboard and there was a burnt resistor on the PCB that I have replaced, but it didn't help.
Anyone knows how to debug the motor that controls the gauge - what are the correct voltage readings, etc?
Maybe it is a simple problem that I could fix with my soldering iron...
I see the speed and other LEDs are ok, but tacho gauge is at zero no matter what the RPM is.
I think the MCU is allright because there are no problems with how the engine works (and it needs the RPM reading to work properly).
During the winter I have opened the dashboard and there was a burnt resistor on the PCB that I have replaced, but it didn't help.
Anyone knows how to debug the motor that controls the gauge - what are the correct voltage readings, etc?
Maybe it is a simple problem that I could fix with my soldering iron...