Motronic MED 9.1
Actuators
Camshaft AdjustmentValve 1 N205,
Camshaft AdjustmentValve 1
(Exhaust) N318
These solenoid valves are integrated in the camshaft
adjustment housing. They distribute the oil pressure
based on the ECM signals for the adjustment
direction and adjustment travel at the camshaft
adjusters.
Both camshafts are continuously adjustable:
• Intake camshaft at 52° of the crankshaft angle
• Exhaust camshaft at 42° of the crankshaft angle
• Maximum valve overlap angle 47°
The exhaust camshaft is mechanically locked when no
oil pressure is available (engine not running).
360_161
Effects of Signal Failure
N205
N318
If an electrical connection to the camshaft adjusters
is defective, or if a camshaft adjuster fails because it
is mechanically seized or as a result of inadequate oil
pressure, there is no camshaft adjustment.
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