3.2L - Ignition System, Servicing - Engine Code(s): Bub: Adjustments Volkswagen Eos I

CAMSHAFT ADJUSTMENT VALVES N205 AND N318, CHECKING

The following procedure is used to diagnose both Camshaft Adjustment Valve 1 -N205- and Camshaft Adjustment Valve 1 (exhaust) -N318

Special tools and workshop equipment required

1. Multimeter.
2. Wiring diagram.

Test requirements

1. The Camshaft Adjustment Valve 1 -N205- fuse OK.
2. Power Supply Relay (terminal 30, B+) -J317- fuse OK.
3. Battery voltage at least 12.5 volts.
4. All electrical consumers such as, lights and rear window defroster, switched off.
5. Vehicles with automatic transmission, shift selector lever into position "P" or "N".
6. A/C switched off.
7. Ground (GND) connections between engine/transmission/chassis OK.
8. Ignition switched off.

Test procedure

Perform a preliminary check to verify the customers complaint. Refer to PRELIMINARY CHECK

Start diagnosis

Disconnect Camshaft Adjustment Valve 1 -N205- electrical harness connector -1- or Camshaft Adjustment Valve 1 (exhaust) -N318-.

Scheme 16

Using a Multimeter, check the Camshaft Adjustment Valve 1 -N205- or Camshaft Adjustment Valve 1 (exhaust) -N318- for resistance.

Scheme 17

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

If the specified value was not obtained

Replace the Camshaft Adjustment Valve 1 -N205- or Camshaft Adjustment Valve 1 (exhaust) -N318-.

If the specified value was obtained

Checking voltage

Switch the ignition on.

Using a Multimeter, Check the Camshaft Adjustment Valve 1 -N205- or Camshaft Adjustment Valve 1 (exhaust) -N318- electrical harness connector terminal to the Power Supply Relay (terminal 30, B+) -J317- terminal 87 for voltage.

Switch the ignition off.

Specified value: battery voltage.

If the specified value was not obtained

Check the wiring connection for an open circuit, short circuit to Battery (+) or Ground (GND).

Check the wiring connection for damage, corrosion, lose 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 105 Pin -VAG1598/31-.

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

Remove the Engine Control Module (ECM) -J623-. Refer to ENGINE CONTROL MODULE J623, REPLACING .

Using a Multimeter, Check the Camshaft Adjustment Valve 1 -N205- or Camshaft Adjustment Valve 1 (exhaust) -N318- electrical harness connector terminal 2 to the Engine Control Module (ECM) electrical harness connector for an open circuit.

Scheme 18

Specified value: 1.5 ohms 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 wiring connection for damage, corrosion, lose or broken terminals.

If necessary, repair the faulty wiring connection.

If no malfunction is found in the wiring and voltage supply was not OK

Erase the DTC memory. Refer to DIAGNOSTIC MODE 04 - ERASE DTC MEMORY

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 voltage supply was OK

Replace the Engine Control Module (ECM) -J623-. Refer to ENGINE CONTROL MODULE J623, 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. Refer to «DIAGNOSTIC MODE 03 - READ DTC MEMORY»(ref-475605-S30658758892012052300000) .
2. If necessary, erase the DTC memory. Refer to «DIAGNOSTIC MODE 04 - ERASE DTC MEMORY»(ref-475605-S15898996512012052300000) .
3. If the DTC memory was erased, generate readiness code. Refer to «READINESS CODE»(ref-475605-S28850913172012052300000) .

End of diagnosis