Does anyone here know what the Voltage output requirements are to trigger any of the more than 30 different "GM" 4 pin modules? Does anyone know what the output of the at least 20 different Mopar Magnetic Pick-Up's are? .
Magnetic pick-ups are variable reluctance. The output varies with RPM, at cranking of 200 RPM a few volts, at 6,000 RPM perhaps up to 100V. The Mopar design is single pole at the coil, the GM has multiple poles in alignment, with a coil in the complete magnetic circuit. The GM system has advantages. There is significant spark scatter in the Mopar system, the reluctor has a small radius, shallow teeth, so run-out is a problem. The specs are not much better than points, but no points or rubbing block wear. Run-out errors are eliminated in the GM with the multiple poles.
The attached picture shows a VR signal the top trace and decode output on the bottom. A disadvantage in a VR sensor is, the amplitude changes the operate point to a small degree.
