Camshaft Adjustment Valve 1 N205 , checking

Special tools, testers and auxiliary items required 

• Multimeter.
• Wiring diagram.

Test requirements 

Fig 1: Identifying Main Fuse Panel

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• The Camshaft Adjustment Valve 1 N205 fuse OK.
• Motronic Engine Control Module (ECM) Power Supply Relay J271 OK, checking → Electrical Wiring Diagrams, Troubleshooting and Component Locations.
• Battery voltage at least 12.5 volts.
• All electrical consumers such as, lights and rear window defroster, switched off.

• Vehicles with automatic transmission, shift selector lever into position "P" or "N".
• A/C switched off.
• Ground (GND) connections between engine/transmission/chassis OK.
• Ignition switched off.

Procedure 

Fig 2: Removing Engine Cover

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• Remove the engine cover with air filter → 24 MULTIPORT FUEL INJECTION (MFI) .

Fig 3: Disconnecting Connector At Camshaft Adjuster

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• Disconnect Camshaft Adjustment Valve 1 N205 electrical harness connector - 1  -.

Fig 4: Measuring Resistance Between Terminals Of Solenoid Valve

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• Using a Multimeter , check the Camshaft Adjustment Valve 1 N205 pins 1 to 2, for resistance.

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

If the specified value was not obtained:

• Replace the Camshaft Adjustment Valve 1 N205 → 15 - ENGINE - CYLINDER HEAD, VALVETRAIN .

If the specified value was obtained:

Checking voltage 

• Switch the ignition on.
• Using a Multimeter , Check the Camshaft Adjustment Valve 1 N205 electrical harness connector terminal pin 1 ground.
• 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. Refer to → 24 MULTIPORT FUEL INJECTION (MFI) .

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

• Remove the Motronic Engine Control Module (ECM) J220. Refer to → Motronic Engine Control Module (ECM) J220 , replacing  .

Fig 5: Identifying 2-Pin Electrical Connector & Terminals

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• Using a Multimeter , Check the Camshaft Adjustment Valve 1 N205 electrical harness connector terminal 2 to the Motronic Engine Control Module (ECM) electrical harness connector terminal 115 for an open circuit.

Specified value: 1.5 Ω 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:

• Replace the Motronic Engine Control Module (ECM) J220. Refer to → Motronic Engine Control Module (ECM) J220 , replacing  .
• Install the engine cover with air filter → 24 MULTIPORT FUEL INJECTION (MFI) .

Final procedures 

After the repair work, the following work steps must be performed in the following sequence:

1. Check the DTC memory.
2. If necessary, erase the DTC memory. Refer to Diagnostic Mode 04: Reset/delete diagnostic data .
3. If the DTC memory was erased, generate readiness code. Refer to Readiness Code .

• End of diagnosis.