Work sequence

Fig 1: 3-Pin Harness Connector From Camshaft Position Sensor G40

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Disconnect 3-pin harness connector from Camshaft Position (CMP) sensor G40 - arrow -.

Fig 2: Measuring Voltage Between Harness Connector Terminals 1 & 3

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Connect multimeter to measure voltage with adapter cables from VW 1594 to terminals 1 (B+) and 3 (GND) on Camshaft Position (CMP) sensor G40 harness connector.
Switch ignition on. Specified value: min. 4.5 V
Switch ignition off.

If no voltage is present:

Remove wiper arms and plenum chamber cover. → 92 WINDSHIELD WIPER & WASHER SYSTEM

Fig 3: Identifying Test Box V.A.G 1598/31 Connected To Control Module Wiring Harness

Courtesy of VOLKSWAGEN UNITED STATES, INC.

Connect Test box VAG 1598/31 to control module wiring harness. Engine Control Module (ECM) is not connected by this action.

Fig 4: Identifying 3-Pin Connector

Courtesy of VOLKSWAGEN UNITED STATES, INC.

Check wiring for open circuit between test box and harness connector using wiring diagram. Terminal - 1 - + socket 98. Terminal - 2 - + socket 86. Terminal - 3 - + socket 108. Wire resistance: max. 1.5 Ω
Also, check if wires are shorted together. Specified value: ∞ Ω

If no malfunction is found in the wiring and voltage was present between terminals - 1 - + - 3 - :

Replace Camshaft Position (CMP) sensor G40.
Check DTC memory. If necessary, repair any malfunctions and erase DTC memory → Diagnostic Trouble Code (DTC) memory, checking and erasing (scan tool functions 02 and 05) .
Display readiness code → Readiness code (function 15), displaying . If the DTC memory has been erased, the readiness code must be generated again → Readiness code (function 15), generating .

If no malfunction is found in the wiring and no voltage was present between terminals - 1 - + - 3 - :