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1) Verify:
Ignition Key is in OFF Position and
Code Scanner is Connected.
2) Put Code Scanner HOLD/TEST
Switch in TEST Position.
• Optional: Turn the AUDIO switch ON to
hear "beeps" when the codes are sent.
3) Turn Ignition Key to ON Position but
DO NOT START THE ENGINE.
• This starts the KOEO Self-Test.
• Codes are sent after 5 seconds.
• Pay no attention to a brief blink which
may occur after ignition key is turned
to ON position.
4) Get Codes from the Flashing STO
Light.
Note: If the light does not flash, go
back and repeat SELF-TEST PART 2
starting with Step 1.
If the light still does not flash, you have
a problem which must be repaired
before proceeding. Refer to the vehicle
service manual "Self-Test Not
Functional" (or similar title) trouble-
shooting chart.
• Count flashes to get service codes.
(Each flash lasts 1/2 second.)
Code 12 looks like:
PAUSE
FLASH (pause) FLASH FLASH
(FLASH = 1, FLASH FLASH = 2.
(Put 1 and 2 together = code 12.)
Code 23 looks like:
PAUSE
FLASH FLASH (pause)
FLASH FLASH FLASH
• All codes are 2 digits long.
• The pause between each digit is 2
seconds.
• After all codes are sent, the whole
group is sent again just one more
time (so you can double check your
code list).
• The longer pause between each
code is 4 seconds.
Example of code 12 only:
FLASH (pause) FLASH FLASH
(longer pause)
FLASH (pause) FLASH FLASH
Example of code series 12 and 42:
FLASH (pause) FLASH FLASH
(longer pause)
FLASH FLASH FLASH FLASH (pause)
FLASH FLASH
(longer pause)
FLASH (pause) FLASH FLASH
(longer pause)
FLASH FLASH FLASH FLASH (pause)
FLASH FLASH
5) Turn Ignition Key to OFF Position.
At this point you can either:
43
PAUSE
PAUSE
PAUSE
PAUSE
PAUSE
PAUSE
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