Hi Sidney,

The VW 1115 is just another German over-engineered testing device. A Hall
effect sensor can be checked with a simple, inexpensive logic probe
available from Radio Shack & electronics catalogs. The Hall sensor generates
a low-high switching signal which parallels engine rotation. The Digifant
Control Module (DCM) uses this signal to set up the ignition/injection
timing. If the Hall sensor is functioning correctly, a logic probe will
"blink" and a voltmeter will flucuate between <1V & ~10VDC during engine
cranking RPM. Make absolutely sure that the correct Hall sensor Signal
circuit is being tested - use the Bentley repair manual schematic!

Regards,    John

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