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for the moment, i came to the following conclusions:
the ECM gets a reference signal from the ICM (=> fuel injection works + tach signal in Tunerpro)
The 4 wires between the ICM and the ECM have a near zero resistance.
The ECM does not put 5v on the bypass, but sets code 42 instead.
Try to find an oscilloscope, to check the signal on the white wire (est)
someone with any ideas?
grtz, D
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