Diagnostic Aids
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 DIC displays dashes (- -) when there is a fault in the class 2 serial data circuit. This occurs only during the following modes:
- Average Fuel Economy
- Average Speed
- Fuel Used
- Instant Fuel Economy
- Trip Range
The compass display and the temperature display still operate normally when there is a fault in the class 2 serial data circuit. In this case refer to SCAN TOOL DOES NOT COMMUNICATE WITH CLASS 2 DEVICE in Data Link Communications for diagnosis.