Passat L4-1984cc 2.0L DOHC (9A) (1990)
Ignition Power Stage: Testing and Inspection
IGNITION COIL POWER OUTPUT STAGE, CHECKING
Requirement
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ignition coil OK
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remove fuse 18
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fuel pumps must not run during cranking because catalytic converter could be damaged
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switch OFF ignition
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disconnect harness connector from power output stage (N 70) of ignition coil
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switch Fluke 83 multimeter to 20 Volt range
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connect multimeter between terminals 1 and 3 of connector using jumper leads from VW 1594 adaptor kit
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switch ON ignition
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must be approx. battery voltage
If NO
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check for open circuit in wiring using wiring diagram, repair or replace as necessary
If battery Voltage obtained
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connect US 1115 LED tester between terminals 2 and 3 of connector using jumper leads from VW 1594 adaptor kit
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operate starter and check for signal from Hall sender
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LED must flicker
If NO
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check Hall sender
If LED flickers
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switch OFF ignition
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connect power output stage harness connector
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disconnect Hall sender (G 40) harness connector at ignition distributor
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switch Fluke 83 multimeter to 20 Volt range