With Generic Scan Tool

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

Recommended special tools and equipment







- VAG1526A hand multimeter
- VAG1594A connector test kit
- VAG1598/31 test box

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


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


Work 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 ... 18 Ohm

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 Ohm

- 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. Test Box, Connecting For Wiring Test







- 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 Ohm

- Also check wires for short circuit to each other as well as to B+ and Ground (GND).
- Specified value: Infinite Ohm (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, see "Mode 3: Check DTC memory". Diagnostic Mode 3: Check DTC Memory
2 - If necessary, erase DTC memory, see "Mode 4: Reset/erase diagnostic data". Diagnostic Mode 4: Reset/Erase Diagnostic Data
3 - Generate readiness code. Readiness Code, Generating

- End diagnosis and switch ignition off.