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Variable Valve Timing Actuator|Testing and Inspection|Page 2038 > < Electrical - Battery Testing And Charging Information|Page 2031
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Variable Valve Timing Actuator: Testing and Inspection

Camshaft Adjustment Valve, Checking

Observe all safety precautions.
View clean working conditions.

Use only gold-plated terminals when servicing any component with gold-plated electrical harness connector terminals.

For wiring diagrams, component locations, and connector views, Refer to the applicable wiring diagram.

Special tools, testers and auxiliary items required

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Multimeter

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Wiring diagram

Test requirements

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The Camshaft Adjustment Valve 1 N205 fuse OK.

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

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Battery voltage at least 12.5 volts.

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All electrical consumers such as, lights and rear window defroster, switched off.

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Vehicles with automatic transmission, shift selector lever into position "P" or "N".

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A/C switched off.

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Ground (GND) connections between engine/transmission/chassis OK.

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Ignition switched off.

Test procedure

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

Start diagnosis

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Remove the engine cover with air filter.

Variable Valve Timing Actuator|Testing and Inspection|Page 2038 > < Electrical - Battery Testing And Charging Information|Page 2031