Solenoid Valve For Camshaft Adjustment, Checking
Solenoid Valve For Camshaft Adjustment, Checking
Recommended special tools and equipment
- V.A.G 1526A multimeter
- V.A.G 1527 B Voltage Tester
- V.A.G 1594A connector test kit
- V.A.G 1598/31 test box
Test requirements:
- Fuse for valve for camshaft adjustment OK.
- Motronic Engine Control Module (ECM) Power Supply Relay -J271- OK; checking. Motronic Engine Control Module (ECM) Voltage Supply Relay -J271-, Checking
- Ignition switched off.
NOTE: Voltage for camshaft adjustment solenoid valves is supplied via Motronic ECM power supply relay.
Test sequence
- Disconnect right electrical harness connector -4- from Valve -1- for camshaft adjustment -N205-.
- Remove coolant reservoir -2- -arrows-.
- Disconnect electrical wire from Engine Coolant Level (ECL) Warning Switch -F66- and set aside coolant reservoir with coolant hoses -1- and -3- connected.
- Disconnect left electrical harness connector -3- from Valve -2- for camshaft adjustment -N208-.
Checking internal resistance
- Connect multimeter at valve for resistance measurement.
- Specified value: 8 to 13 Ohms
If specified value is not obtained:
- Replace valve.
If specified value is obtained:
Checking voltage supply
- Connect e.g. V.A.G 1527 B voltage tester as follows:
Harness connector Terminal Measure to
1 Engine Ground (GND)
- Switch ignition on.
- LED must light up.
If LED does not light up:
- 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. Test Box, Connecting For Wiring and Component Test
- Check the following wire connections for open circuit according to wiring diagram:
- Valve -1- for camshaft adjustment -N205- (bank 1)
Harness connector Terminal Test box Socket
2 115
- Valve -2- for camshaft adjustment -N208- (bank 2)
Harness connector Terminal Test box Socket
2 120
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.
Assembly is performed in the reverse order of removal, note the following:
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". Mode 3: Check DTC Memory
2. If necessary, erase DTC memory see "Mode 4: Reset/erase diagnostic data". Mode 4: Reset/Erase Diagnostic Data
3. Generate readiness code. Readiness Code, Generating
- End diagnosis and switch ignition off.