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Home >> Volkswagen >> 1991 >> Passat L4-1984cc 2.0L DOHC >> Repair and Diagnosis >> Powertrain Management >> Ignition System >> Hall Effect Sensor >> Testing and Inspection >> Hall Sender, Checking
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Hall Sender, Checking



HALL SENDER, CHECKING

- remove fuse 18
- fuel pumps must not run during starting or catalytic converter could be damaged

- disconnect power output stage (N 70) harness connector from ignition coil







- connect US 1115 LED tester to terminals 2 and 3 of harness connector using jumper leads from VW 1594 adaptor kit
- operate starter and check for signal from Hall sender (G 40)

If LED flickers
- Hall sender is OK and checking is complete

If LED does NOT flicker
- switch OFF ignition

- disconnect Hall sender harness connector at ignition distributor
- switch Fluke 83 multimeter to 20 Volt range







- connect multimeter to outer terminals of harness connector using jumper leads from VW 1594 acceptor kit
- switch ON ignition
- observe voltage supply to Hall sender from CIS-E Motronic control unit (J 204)
- must be 9 volts minimum

- slide rubber boot (covering Hall sender harness connector) up the wires but leave the connector connected









- connect US 1115 LED tester between center wire of connector and battery positive using jumper leads from VW 1594 adaptor kit
- operate starter and check for signal from Hall sender

If LED flickers
- Hall sender is OK and test is complete

If LED does NOT flicker

- perform Electrical Tests A and/or B in Repair Group D2
- and/or replace Hall sender (G 40)
- and/or replace CIS-E Motronic control unit (J 204)

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