CheckIntake manifold pressure sender G71 — VW

🧭 Before you start

• Renewed: sender, control unit, sensor

📋 Procedure

1. Check the sender hose for staunchness, leaks, folds, etc.
2. Measure the sensor connector voltage, with ignition on: Pins 1 and 2: Specification: 4.5..5.5 V. Pins 2 and 3: Specification: 5...6 V. Pins 1 and 3: Specification: Approximately 1 V.
3. Install the vacuum pump on the sender and the voltmeter to the sender pins 2 and 3. Specification: The applied depression is maintained if system is staunch. Voltage between pins 2 and 3 decreases as depression is applied.
4. Replace the sender.
5. Erase fault memory and execute a test drive.

6. Connect the sensor wiring harness and install the AdapterVAG 1598/18 to the control unit connector.
7. Measure resistance between pins 17 and 18, 17 and 37, 18 and 37. Specification: The result can not be zero or infinite.
8. Replace the control unit.
9. Measure resistance between pins 1 and 2, 1 and 3, 2 and 3. Specification: The result can not be zero or infinite.
10. Replace the sensor.
11. Check wiring harness.

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