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Home >> GMC Truck >> 1999 >> S15/T15 Sonoma P/U 2WD V6-4.3L VIN W >> Repair and Diagnosis >> Powertrain Management >> Relays and Modules - Powertrain Management >> Relays and Modules - Computers and Control Systems >> Body Control Module >> Testing and Inspection >> Scan Tool Testing and Procedures >> Scan Tool Data Definitions >> Input 1 >> Ignition Power Mode

Ignition Power Mode

Range: OFF/ RUN/ CRANK/ UNKNOWN
The BCM uses the ignition power mode data in order to determine the position of the ignition switch. OFF is displayed when the ignition switch is in the OFF or the ACCESSORY positions.

RUN is displayed when the switch is in the RUN position.

CRANK is displayed when the ignition switch is in the CRANK position.

UNKNOWN is displayed when the BCM is unable to determine the position of the ignition switch (i.e. between the OFF and the RUN position).
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