Riviera Models
WARNING: This page is about a different car, the 1986 Oldsmobile Toronado and 1986 Buick Riviera. However, it is still accessible from the selected car via links, so may be relevant.
After the trouble codes have been displayed, the "Service Mode" can be used to perform several tests on different systems at 1 time. Upon completion of the trouble code display, a specific system may be selected for testing. Following the trouble code display, the first available system will be displayed (i.e. ECM). When making system selections there are 3 available alternatives. See Figure .
- Pressing the "EXIT" key pad will stop the system selection process and return to the beginning of the trouble code sequence.
- Pressing the "NO" key pad will display the next available system selection.
- Pressing the "YES" key pad will select the displayed system for testing.