ENGINE - V8 (page 2 of 3)

ENGINE - V8

12-2-16 DESCRIPTION AND OPERATION

Camshaft Position Impulse Wheels
 The camshaft position impulse wheels provide camshaft position status to the engine control module via the camshaft 
position sensors. The asymmetrical placement of the sensor wheel pulse plates provides the engine control module 
with cylinder specific position ID in conjunction with crankshaft position.
 

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 ENGINE MANAGEMENT SYSTEM – V8, DESCRIPTION AND OPERATION, Bosch ME 7.2 Engine 

Management System.

Camshaft Position Sensors
There are two CMP position sensors which are located on the upper timing case covers. The camshaft position 
sensors monitor the position of the camshafts to establish ignition timing order, fuel injection triggering and for 
accurate Variable Camshaft Control (VCC) camshaft advance-retard timing feedback. The camshaft position sensor 
is a Hall-effect sensor which switches a battery fed supply on and off. The supply is switched when the teeth machined 
onto the camshaft gear pass by the tip of the sensor. The four teeth are of differing shapes, so the ECM can determine 
the exact position of the camshaft at any time. 
 

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 ENGINE MANAGEMENT SYSTEM – V8, DESCRIPTION AND OPERATION, Bosch ME 7.2 Engine 

Management System.