S4 Quattro Sedan V6-2.7L Turbo (APB) (2000)
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Connect multimeter (Fluke 83 or equivalent) (voltage measurement range) between engine Ground (GND) and socket 1 of connector.
Specified value: approx. 5 V
Checking signal wire for Hall sensor
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Connect multimeter (Fluke 83 or equivalent) (voltage measurement range) between engine Ground (GND) and socket 2 of relevant connector.
Specified value: approx. battery voltage
Checking Ground (GND) wire for Hall sensor:
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Connect VAG1598/31 test box to wiring harness for engine control module. Do not connect to the engine control module itself. Refer to "Scan
Tool Testing/Wiring And Component Check With VAG1598/31 Test Box", See: Computers and Control Systems/Testing and Inspection
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Connect multimeter (Fluke 83 or equivalent) (resistance measurement range) between socket 3 on connector and engine Ground (GND).
Specified value: Continuity
Resistance in wiring: max. 1.5 Ohms
If all specifications are reached but the diode test lamp does not flash (measurement taken between terminals 1 and 2 without unplugging connector and
while operating starter):
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Replace relevant Hall sensor.
If specifications are obtained:
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Check wiring.
Checking wiring between hall sensor and engine control module
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Connect VAG1598/31 test box to wiring harness for engine control module. Do not connect to the engine control module itself. Refer to "Scan
Tool Testing/Wiring And Component Check With VAG1598/31 Test Box", See: Computers and Control Systems/Testing and Inspection
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Check wiring connection from Hall sensor to engine control module for open circuit and/or short circuit to B+ or Ground (GND).