Circuit Description

The camshaft position (CMP) sensor is triggered by a notched reluctor wheel built onto the exhaust camshaft sprocket. The CMP sensor provides four signal pulses every camshaft revolution. Each notch, or feature of the reluctor wheel is of a different size which is used to identify the compression stroke of each cylinder and to enable sequential fuel injection. The CMP sensor is connected to the powertrain control module (PCM) by the following circuits:

• A 5-volt circuit
• A low reference circuit
• A signal circuit

The PCM monitors the CMP sensor's performance by comparing the number of it's pulses to the CKP sensor pulses. There is a given number of CMP sensor pulses to CKP sensor pulses. If this ratio is not kept, the PCM will set DTC P0341.