With Generic Scan Tool

Solenoid Valve For Camshaft Adjustment, Checking

Recommended special tools and equipment







- VAG1526A multimeter
- VAG 1527 B Voltage Tester
- VAG1594A connector test kit
- VAG1598/31 test box

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

NOTE: Voltage for camshaft adjustment solenoid valves is supplied via Motronic ECM power supply relay.

Procedure

Cylinder bank 2 (left):







- Remove cover -1- in engine compartment (left side).







- Remove coolant reservoir (arrow)
- Remove line from Engine Coolant Level (ECL) Warning Switch -F66- and lay coolant reservoir to side.

NOTE: Coolant hoses -1- to -3- remain connected.

Cylinder bank 1 (right):







- Remove cover -1- in engine compartment (right side).







- Remove bolts (arrows).
- Detach Evaporative Emission (EVAP) Canister Purge Regulator Valve -N80- -1- at air guide.
- Remove air guide -2-.







- Remove air filter housing (arrows).

Continuation for both sides:







- Disconnect harness connector (arrow) from connector-adapter.

NOTE: Illustration depicts cylinder bank 2 (left).

Checking internal resistance

Valve for camshaft adjustment (intake):







- Connect multimeter between terminal 1 and 2 for resistance measurement.
- Specified value: 7.4 ... 8.2 Ohm

Valve for camshaft adjustment (exhaust):
- Connect multimeter between terminal 2 and 3 for resistance measurement.
- Specified value: 12.8 ... 14.2 Ohm

All:
If specified value is not obtained:
- Replace the respective solenoid valve for camshaft adjustment.

If specified value is obtained:

Checking voltage supply







- Connect e.g. V.A.G 1527 B voltage tester as follows:

Harness connector Measure to
Terminal
2 Engine Ground (GND)

- Switch ignition on.
- LED must light up.
- Switch ignition off.

If LED does not light up:
- Check wire connection from terminal 2 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. Text Box, Connecting For Wiring Test







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







- 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:infinity 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, "Mode 3: Check DTC memory". Diagnostic Mode 3: Check DTC Memory
2 - If necessary, erase DTC memory, "Mode 4: Reset/erase diagnostic data". Diagnostic Mode 4: Check Reset/Erase Diagnostic Data
3 - Generate readiness code. Readiness Code, Generating

- End diagnosis and switch ignition off.