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Home >> Chevrolet >> 2017 >> Malibu L >> Repair and Diagnosis >> Body & Frame >> Ignition Switch/Steering Lock >> Diagnostic Information And Procedures >> Diagnostic Information and Procedures >> DTC P15B9 or P15BA: Electric A/C Compressor Control Module Ignition On/Start Switch Circuit >> Circuit/System Description

Circuit/System Description

The body control module (BCM) controls the ignition main relay through the control circuit by applying voltage to the run/crank coil circuit. The ignition circuit is energized when the vehicle power mode is Ignition ON Engine Running/Vehicle ON or Ignition ON/Vehicle in Service Mode.

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