Key On/Engine Off Test

1. Turn power switch on the side of the STAR tester to ON position.
2. Depress button in the center of the tester. A colon should appear in the left side of the display window.
3. Turn ignition switch to ON position. The red LED light on the tester should come ON.
4. If the LED light does not come ON, there is an open circuit within the EEC-IV system. Ensure that all electrical connectors are secure. If the LED still does not come ON, the ECA will indicate the open circuit as a hard fault (malfunction) during the self-test procedure. If the LED comes ON when tightening or wiggling the harness or electrical connectors, the ECA will indicate the open circuit as an intermittent fault during the self-test procedure. Prepare to note the service codes as a reference. The LED light on the STAR tester will flash ON and OFF as the service codes are generated by the ECA.
5. If the system inputs are satisfactory for hard faults (malfunctions), the first code to appear in the tester window will be the numeral 11 (system pass). Any other codes that may appear before the separator code (10) should be noted. The codes indicate that a hard fault (malfunction) exists in one or more of the system inputs.
6. A separator code (10) will appear in the tester window when the ECA has stopped checking for malfunctions.
7. If system inputs are satisfactory for intermittent faults, the numeral 11 will appear in the tester display window after the separator code (10). Any other codes that appear should be noted. These codes indicate there is an intermittent fault stored in the ECA's memory. The last code to appear in the tester display window will remain there until the tester is de-activated.
8. Compare service codes obtained in this test to procedure instructions described in the appropriate Quick Test charts. Do not attempt to repair intermittent faults until after the engine running test has been performed. Repair all hard faults first, then, repair the intermittent faults. Repeat this test if service codes obtained indicate hard and/or intermittent faults exist in the EEC-IV system.