Valve -1- For Camshaft Adjustment -N205-, Checking

Valve -1- For Camshaft Adjustment -N205-, Checking

Recommended special tools and equipment



- V.A.G1526A hand multimeter
- V.A.G1594A connector test kit
- V.A.G1598/31 test box

Test requirements:
- Fuse for valve for camshaft adjustment is OK
- Motronic Engine Control Module (ECM) Power Supply Relay -J271- OK:
- Ignition switched off.

NOTE: Voltage for valve for camshaft adjustment is supplied via Motronic Engine Control Module (ECM) Power Supply Relay - J271-.

Procedure





- Disconnect electrical harness connector (arrow) at Valve -1- for camshaft adjustment -N205-.

Checking internal resistance





- Connect multimeter at valve for resistance measurement.
Specified value: 10 to 18 Ohms

If specified value is not obtained:
- Replace valve for camshaft adjustment.

If specified value is obtained:

Checking voltage supply





- Connect multimeter between terminal 1 and 2 for voltage measurement.
- Operate starter briefly.
Specified value: approx. battery voltage

If there is no voltage:
- Connect multimeter for voltage measurement as follows:

Harness connector Terminal Measure to
1 Engine Ground (GND)

- Switch ignition on.
Specified value: approx. battery voltage

- Switch ignition off.

If there is no voltage again:
- Check wire connection from terminal 1 of harness connector via fuse to Motronic Engine Control Module (ECM) Power Supply Relay -J271- for open circuit according to wiring diagram.
Specified value: Wire resistance max 1.5 Ohms

- If necessary, repair wire connection.

If voltage supply is OK.

Checking control wire
- Connect test box to wiring harness of Engine Control Module (ECM). ECM is not connected.






- Check the following wire connections for open circuit according to wiring diagram.

Harness connector Terminal Test box Socket
2 115
Specified value: Wire resistance max 1.5 Ohms

- Check wires for short circuit to each other as well as to B+ and Ground (GND).
Specified value: Infinite Ohms (no continuity)

- If necessary, repair wire connection.

If no malfunctions are found in wires:
- Replace Engine Control Module (ECM).

If no malfunctions are detected:
- Replace mechanical camshaft adjuster.

Final procedures
After repair work, the following work steps must be performed in the mentioned sequence:
1. Check DTC memory.
2. If necessary, erase DTC memory.
3. Generate readiness code.

- End diagnosis and switch ignition off.