Circuit/System Verification
WARNING: This page is about a different car, the 2006 Buick Lucerne. However, it is still accessible from the selected car via links, so may be relevant.
- Ignition ON and all doors closed, observe the scan tool Ctsy. Lamp Actv. Reason parameter while turning the dome lamp switch ON and OFF. The reading should change between OFF and MANUAL.
- If the Ctsy. Lamp Actv. Reason parameter does not change between OFF and MANUAL, refer to Dome Lamp Switch Test .
- Observe the scan tool Driver Door Open Sw. parameter while opening and closing the driver door. The reading should change between Open and Closed.
- If the Driver Door Open Sw. parameter does not change between Open and Closed, refer to Door Open Switch Test - Front .
- Observe the scan tool Passenger Door Open Sw. parameter while opening and closing the front passenger door. The reading should change between Open and Closed.
- If the Passenger Door Open Sw. parameter does not change between Open and Closed, refer to Door Open Switch Test - Front .
- Open each rear door one at a time and observe the courtesy lamps. The courtesy lamps should illuminated when each rear door is opened.
- If the courtesy lamps do not illuminate, refer to Door Open Switch Test - Rear .
- If all scan tool parameters test normal, refer to the appropriate diagnostic procedure listed below.
- Courtesy Lamp Circuit Test
- Inadvertent Power Courtesy Lamp Circuit Test