Quote:
|
Originally Posted by Hog Caller
Have checked the TDC, Crank, and Cyl sensors per Honda service manual.
With an oscilloscope attached to the connecting white wire between the ECU and Ingiter, and the engine spinning, a constant positive 10.5 volts was observed. There was no cyclic voltage drop to trigger the igniter. Same test with no connection from the ECU to the igniter gave the same results.
Is a good igniter, connected to the ECU, required to see the pulsating output of a properly functioning ECU on an oscilloscope?
|
While your engine is being cranked, the positive side of the ignition coil will give you constant voltage and the negative side of the coil will give you pulsating voltage.
Using your DSO (osciloscope) set it to wave form and check the signal output of your CMP and CKP sensors. do this while your engine is being cranked. Your sensors are faulty if you dont see any squarewaves on your DSO.