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Variable Valve Timing Actuator: Testing and Inspection

Diagnostic Procedures

Camshaft Adjustment Valve 1, Checking

Special tools, testers and auxiliary items required

‹› multimeter.

‹› Wiring diagram.

Test requirements

‹› The Camshaft Adjustment Valve 1 (N205) fuse OK.

‹› Motronic Engine Control Module (ECM) Power Supply Relay (J271) OK.

‹› 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.

Test procedure

-

Perform a preliminary check to verify the customers complaint. Refer to => [ Preliminary Check ] See: Powertrain Management/Computers and
Control Systems/Testing and Inspection/Scan Tool Testing and Procedures/Preliminary Check

Start diagnosis

-

Remove the engine cover.

-

Disconnect Camshaft Adjustment Valve 1 (N205) electrical harness connector - 1 -.

-

Using a multimeter, check the Camshaft Adjustment Valve 1 (N205) for resistance.

Engine, Cooling and Exhaust > Engine > Actuators and Solenoids - Engine > Variable Valve Timing Actuator > Component Information > Testing and Inspection

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