Scan Tool Data Definitions: Outputs

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Backup Lamps: The scan tool displays the commanded state of the body control module (BCM) which directly supplies battery positive voltage to the backup lamps. The scan tool displays On when the BCM activates the backup lamps upon receiving a backup lamp request signal from the powertrain control module (PCM).
Daytime Running Lamps: The scan tool displays the commanded state of the DRL. The scan tool displays Active when the BCM signals the turn/hazard flasher module to illuminate the DRL.
Headlamps On Indicator: The scan tool displays the commanded state of the BCM which directly supplies battery positive voltage to the headlamps on indicator. The scan tool displays On when the BCM activates the headlamps on indicator upon receiving a headlamp request signal from the headlamp switch.
High Beam Relay: The scan tool displays the commanded state of the high beam relay. The scan tool displays On when the BCM allows the high beam relay to go to ground activating the high beam headlamps.
Inadvertent Power: The scan tool displays the state of the inadvertent power battery rundown protection feature of the BCM. The scan tool displays Off when all inadvertent power circuits are functioning normally. The scan tool will display On as soon as a lamp on the inadvertent power circuit is activated.
Park Lamp Relay: The scan tool displays the commanded state of the park lamp relay. The scan tool displays On when the BCM allows the park lamp relay to go to ground to activate the park lamps.