Cruise Control: Description and Operation

There are two on-board diagnostic functions:
1. Operation Mode, which checks for and indicates correct operation of the input signals to the control module.
2. Condition Detection Mode, which indicates troubles in the system.

The two functions can be done by using either of the following methods:
- Checking the flashing pattern of the cruise set indicator light in the instrument cluster.
- Checking the output of the data link connector by using the New Generation Star (NGS) tester.