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Home >> Chevrolet >> 2002 >> Blazer 4D Utility, 4WD, Part Time >> Repair and Diagnosis >> External Pages >> Different car >> Section 1471 (Engine Control System - Diagnosis - 4.2L (DTC P0013 To DTC P0138)) >> Diagnosis Information & Procedures >> DTC P0013 >> Circuit Description

Circuit Description

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The camshaft position (CMP) actuator is controlled by the PCM through a high control circuit and a low reference circuit. The high control circuit carries a 12-volt pulse width modulated (PWM) signal from the PCM to the CMP actuator solenoid in order to control the amount of engine oil flow to the cam phaser. The low reference circuit is used as a return circuit. The PCM has the ability to monitor the functionality of the high control and the low reference circuit. If the PCM detects an open, short to ground, or a short to voltage, DTC P0013 sets.

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