With Manufacturer's Scan Tool

Star Tester Connection & Battery Check

1. Turn ignition switch to OFF position.
2. Locate Star tester connector in engine compartment behind LH shock tower.
3. Connect Super Star tester electrical connector to vehicle connector. One multi-pin connector is used.
4. Turn power switch on RH side of Super Star tester to On. A steady 00 or a blank screen will appear signifying that the tester is ready to start the Self-Test and receive service codes. If the message LO BAT appears in the upper lefthand corner of the read-out display and stays On, replace the Super Star tester's 9 volt battery before continuing with the Self-Test. The message LO BAT will appear momentarily when the power switch is turned to the Off.
5. With the ignition switch in the Off position, push the Self-Test button in the center of the Super Star II tester. Push the button again. This deactivates the Self-Test sequence.

DTC 11-78:

6. If the Super Star tester passes the Self-Test (a 00 or blank screen with button in TEST position), proceed with the On-Board Self-Test. If any service codes appear during the Self-Test, refer to the On-Board Self-Test Service Code Index.