Conditions for Setting the DTC
WARNING: This page is about a different car, the 2002 GMC Safari and 2002 Chevrolet Astro. However, it is still accessible from the selected car via links, so may be relevant.
- When the ambient light sensor input voltage is less than 0.2 volts.
- The courtesy lamp relay coil control circuit is open or shorted to ground.
- The above conditions must be met for 0.5 seconds.