Camshaft Adjustment Valve 1 N205, checking

Special tools, testers and auxiliary items required 

• Multimeter.
• Wiring diagram.

Test requirements 

• Motronic Engine Control Module (ECM) J220 Fuses OK.
• ] Motronic Engine Control Module (ECM) Power Supply Relay J271 OK.
• Battery voltage at least 12.5 volts.
• All electrical consumers such as, lights and rear window defroster, switched off.

• Vehicles with automatic transmission, shift selector lever into position "P" or "N".
• A/C switched off.
• Ground (GND) connections between engine/transmission/chassis OK.
• Ignition switched off.

Test procedure 

• Perform a preliminary check to verify the customers complaint. Refer to → Preliminary Check .

Start diagnosis 

Fig 1: Identifying Camshaft Position (CMP) Sensor G40 Electrical Harness Connector

Courtesy of VOLKSWAGEN UNITED STATES, INC.

• Disconnect Camshaft Adjustment Valve 1 N205 electrical harness connector - 3  -.

Fig 2: Identifying 2-Pin Electrical Harness Connector

Courtesy of VOLKSWAGEN UNITED STATES, INC.

• Using a Multimeter, check the Camshaft Adjustment Valve 1 N205 electrical terminals 1 to 2 for resistance.

Specified value: 5.0 to 8.0 Ω (at approx. 20°C)

If the specified value was not obtained:

• Replace the Camshaft Adjustment Valve 1 N205.

If the specified value was obtained:

Checking voltage 

• Switch the ignition on.
• Using a Multimeter, check the Camshaft Adjustment Valve 1 N205 electrical harness connector terminal 2 to Ground (GND) for voltage.
• Switch the ignition off.

Specified value: battery voltage.

If the specified value was not obtained:

• Check the Camshaft Adjustment Valve 1 N205 electrical harness connector terminal 2 to the Motronic Engine Control Module (ECM) Power Supply Relay J271 socket 5/87A for an open circuit, short circuit to Battery (+) or Ground (GND).
• Check the electrical harness connector for damage, corrosion, loose or broken terminals.
• If necessary, repair the faulty wiring connection.

If the specified value was obtained:

Checking wiring 

If the manufacturers test box is being used, perform the following step.

• Install the test box VAG1598/31. Refer to 24 MULTIPORT FUEL INJECTION (MFI) .

If the manufacturers test box is not being used, perform the following step.

• Remove the Motronic Engine Control Module (ECM) J220. Refer to → Motronic Engine Control Module (ECM) J220, Replacing .

Fig 3: Identifying 2-Pin Electrical Connector & Terminals

Courtesy of VOLKSWAGEN UNITED STATES, INC.

• Using a Multimeter, Check the Camshaft Adjustment Valve 1 N205 electrical harness connector terminal 1 to the Motronic Engine Control Module (ECM) J220 electrical harness connector for resistance.

Specified value: 1.5 Ω Max.

If the specified value was not obtained:

• Check the wiring connection for an open circuit, short circuit to Battery (+) or Ground (GND).
• Check the electrical harness connector for damage, corrosion, loose or broken terminals.
• If necessary, repair the faulty wiring connection.

If no malfunction is found in the wiring and voltage supply was OK:

• Replace the Camshaft Adjustment Valve 1 N205.
• Erase the DTC memory. Refer to → Diagnostic Mode 04 - Reset/Delete Diagnostic Data .
• Perform a road test to verify repair.

If the DTC does not return:

Repair complete, Generate readiness code. Refer to → Readiness Code Description .

• End diagnosis.

If the DTC does return and no malfunction is detected in the wiring and the Ground activation was not OK:

• Replace the Motronic Engine Control Module (ECM) J220. Refer to → Motronic Engine Control Module (ECM) J220, Replacing .
• Assembly is performed in the reverse of the removal.

Final procedures 

After repair work, the following work steps must be performed in the following sequence:

1. Check the DTC memory.
2. If necessary, erase the DTC memory. Refer to Diagnostic Mode 04 - Reset/Delete Diagnostic Data .
3. If the DTC memory was erased, generate readiness code. Refer to Readiness Code Description .

End of diagnosis.