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.
- The headlamp and panel dimmer switch in the AUTO mode.
- The ambient light sensor state is in the DARK state.
- The headlamp relay coil supply voltage circuit shorted to ground.
- The above conditions must be met for 0.5 seconds.