Key On Engine Running Self Test

1. Connect tester to vehicle self test connector.
2. Position select switch to EEC-IV system.
3. Select fast code mode or slow code mode.
4. Turn tester power On.
5. Turn vehicle ignition On.
6. Run engine until normal operating temperature is obtained.
7. Turn engine Off.
8. Start engine, then depress test button on tester to test position.
9. Read engine I.D. codes, then on some models a dynamic response code, then the service codes.