With DRBII Tool

1. Connect DRBII test tool or equivalent, to electrical connector located under the hood.
2. Turn ignition switch to the RUN position, then turn test tool ON.
3. Depress YES key to select model year, engine and diagnostic test mode.
4. Record all fault codes, then erase codes.
5. Start engine and allow to idle for 7 minutes.
6. Raise engine speed above 1500 RPM for 30 seconds.
7. Turn engine off, then put system in diagnostic test mode.
8. Record all codes.