Dual LED System
- Turn ignition switch to ON position. Use a screwdriver to turn ECM diagnostic mode selector fully clockwise.
- Wait for inspection lights to begin flashing. At this time, inspection lights will flash mode options (i.e., one flash for Mode I, 2 flashes for Mode II, etc.). As soon as inspection light flashes desired mode number (3 flashes for self-diagnostic mode), turn mode selector off (fully counterclockwise).
- If mode selector is kept in ON position (fully clockwise), mode selections will continuously cycle. This cycling will not erase memory.