volkswagen Workshop Repair Guides

Volkswagen Workshop Service and Repair Manuals

With Manufacturer's Scan Tool|Page 1107 > < Diagram Information and Instructions|Page 1104
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Engine Speed Sensor: Testing and Inspection
With Manufacturer's Scan Tool

Engine Speed (RPM) Sensor -G28- Checking

Engine speed (RPM)sensor -G28- serves dual purpose of speed and reference mark sensor. An inoperative sensor will stop engine.

Special tools

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VAG 1598/22 Test Box (MY 1999)

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VAG 1598/31 Test Box (from MY 2000)

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Fluke 83 multimeter

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VW 1594 Adapter kit

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Wiring diagram

Test sequence

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Switch OFF ignition.

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Disconnect -G28- harness connector.

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Measure resistance between connector terminals 1 + 2.

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Specification: 1000 to 1500 Ohms

If specification not obtained

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Replace Engine Speed sensor -G28-.

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Display the Readiness code.  See: Powertrain Management/Computers and Control Systems/Testing and Inspection/Monitors, Trips, Drive Cycles
and Readiness Codes

If DTC memory was erased

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Set the Readiness code.  See: Powertrain Management/Computers and Control Systems/Testing and Inspection/Monitors, Trips, Drive Cycles and
Readiness Codes

If specification obtained

With Manufacturer's Scan Tool|Page 1107 > < Diagram Information and Instructions|Page 1104