Code Interpretation

Prior to conducting the self-test, a preliminary check-out and vehicle preparation should be performed, test equipment must be connected and functioning properly.




READING CODES W/SELF-TEST AUTOMATIC READOUT (STAR) OR EQUIVALENT

Checking STAR tester:

After connecting the STAR tester as described previously and turning power switch to ON position, the tester will indicate a display check and the numerals 88 will begin to flash, Fig. 17. A steady 00 will then appear, signifying that the STAR tester is ready to start the self-test procedure and receive the test service codes.
To receive the service codes, press the button at the front of the STAR tester. The button will stay down and a colon will appear in the display window in front of the 00 numerals. The colon must be displayed to receive the service codes. To clear the display window during the self-test, turn ignition switch to OFF position and press tester button once (colon will disappear), then press tester button down again (colon will appear). Every time the STAR tester is turned OFF, the low battery indicator (LO BAT) should show briefly at the upper left corner of the display window. If the LO BAT indicator shows steadily at any other time during the operation of the STAR tester with any service code, turn power switch to OFF position and replace tester's 9 volt battery.
The STAR tester will display the last service code received, even after disconnecting it from the vehicle. It will retain the service code on the display until the power is turned OFF or the button is released, and then pushed down again.