Ignition Hall Effect Sensor: Testing and Inspection
Hall sensor, checkingNOTE: The Hall sensor can also be checked using the VAG 1598 Test Box and VAG 1598/18 adaptor.
If VAG 1598 Test Box is not available; check Hall sensor as follows:
Voltage supply, checking
- disconnect Hall sensor harness connector at ignition distributor
- switch Fluke 83 multimeter to 20 Volt range
- connect multimeter between outer terminals of harness connector using jumper wires from VW 1594 adaptor kit
- switch ON ignition
- must be 4.5 Volts minimum
If no voltage indicated
- switch OFF ignition
- check wiring using wiring diagram
If wiring OK
- replace engine control module (J 220)
Function, checking
- remove fuse 18
- slip rubber boot for Hall sensor harness connector away from the connector (leaving harness connector connected but with terminals exposed to allow access for test connections)
- connect US 1115 LED tester between center terminal of connector and brown/white wire using jumper leads from VW 1594 adaptor kit
- operate starter
- LED tester must flicker
If NO
- replace Hall sensor