DTC B2618: Courtesy Light Circuit High: Notes

BCM monitors Gray/Black wire between BCM and courtesy light relay cavity terminal No. 2 to determine when courtesy lights are on. See WIRING DIAGRAMS  . When circuit is shorted to battery voltage, DTC will set. BCM also monitors ignition switch position based on ignition signal inputs. BCM performs a self-test on power up.

Conditions for setting DTC are:

• Gray/Black wire is shorted to battery voltage and BCM commands courtesy light relay on
• System voltage is 9-16 volts
• Conditions met for .5 second