Operation CHARM: Car repair manuals for everyone.
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Scan Tool Data Definitions

Scan Tool Data Definitions

Body Control Module (BCM)
Ignition 0: Displays 0.0 - 25.5 Volts. This parameter is the system voltage measured by the BCM at the BCM battery input.

Ignition 1: Displays 0.0 - 25.5 Volts. This parameter is the system voltage measured by the BCM at the BCM ignition 1 voltage input.

Park (BTSI) Relay: Displays indicates ON when the body control module applies a ground to the automatic transmission shift lock control solenoid.