Test sequence

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

Fig 1: Disconnecting 3-Pin Harness Connector From Camshaft Position (CMP) Sensor

Courtesy of VOLKSWAGEN OF AMERICA, INC.

Connect multimeter to measure voltage with adapter cables from VW1594 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:

Fig 2: Identifying CMP Sensor Harness Connector Terminals

Courtesy of VOLKSWAGEN OF AMERICA, INC.

Remove wiper arms and plenum chamber cover.
See Plenum Chamber Cover Removal & Installation
Connect VAG1598/31 test box to control module wiring harness. Engine Control Module (ECM) is not connected by this action.

Fig 3: Connecting VAG1598/31 Test Box To Control Module Wiring Harness

Courtesy of VOLKSWAGEN OF AMERICA, 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: INFINITY Ω

Fig 4: Identifying CMP Sensor Harness Connector Terminals
Courtesy of VOLKSWAGEN OF AMERICA, INC.

If no malfunction is found in the wiring and voltage was present between terminals -1- + -3-:
Replace Camshaft Position (CMP) sensor -G40-, see item 2.
Check DTC memory. If necessary, repair any malfunctions and erase DTC memory, see DIAGNOSTIC TROUBLE CODE (DTC) MEMORY .
Display readiness code, see READINESS CODE (FUNCTION 15), DISPLAYING .
If the DTC memory has been erased or the ECM was disconnected from permanent battery (B+) voltage, the readiness code must be generated again, see READINESS CODE (FUNCTION 15), GENERATING .

If no malfunction is found in the wiring and no voltage was present between terminals -1- + -3-:
Replace Engine Control Module (ECM), see ENGINE CONTROL MODULE (ECM), REPLACING .