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Home >> Chevrolet >> 2007 >> Impala SS >> Repair and Diagnosis >> External Pages >> Different car >> Section 509 (Cellular System, Entertainment System, And Navigation System) >> Diagnostic Information and Procedures >> DTC B1287 >> Circuit/System Description

Circuit/System Description

WARNING: This page is about a different car, the 2007 Saturn Sky. However, it is still accessible from the selected car via links, so may be relevant.

The amplifier receives PWM signals on the circuit at varying duty cycle percentages for controlling the muted and unmuted functions of the amplifier.

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