Conditions for Setting the DTC
WARNING: This page does not describe the selected car, but rather 6 other vehicles, including the 2003 GMC Savana Special, 2003 GMC Savana Camper Special, 2003 GMC Savana, 2003 Chevrolet RV Cutaway, and 2003 Chevrolet Cutaway. However, it is still accessible from the selected car via links, so may be relevant.
- When the BCM sends a DRL OFF command and the DRL low control circuit is shorted to ground.
- When the BCM sends a DRL ON command and the DRL low control circuit is shorted to voltage or open.
- When the Flasher fuse 15 in the underhood fuse block is open.
- When the following circuits are shorted to ground:
- Left rear stop/turn lamp supply voltage
- Right rear stop/turn lamp supply voltage
- Left DRL/turn supply voltage
- Right DRL/turn supply voltage
- Left turn signal indicator lamp supply voltage
- Right turn signal indicator lamp supply voltage
- Battery supply voltage from the underhood fuse block Flasher fuse
- The instrument panel lamps dimming control circuit is shorted to ground.