Ford OBD1 Systems
CODE RETRIEVAL PROCEDURES - KOEO TEST
90 3160g
The LCD display shows instructions to
prepare the vehicle for the KOEO Test.
4.
Start and warm-up engine to normal
operating temperature. Press the
ENTER
button to continue.
5.
Turn ignition key OFF and wait for the
on screen prompt. If you wish to exit the
KOEO test at this time, press the
SYSTEM MENU
button.
6.
Turn the ignition ON. DO NOT start the
engine. If your vehicle is equipped with
one of the following engine types, perform
the added procedures described below:
For 4.9L engines with standard
transmission:
Press and hold the
clutch until all codes are sent (steps
7 through 9).
For 7.3L diesel engines:
Press
and hold accelerator until all codes
are sent (steps 7 through 9).
For 2L turbo engines with octane
switch:
Put switch in premium
position.
7.
Press the
ENTER
button to continue.
8.
While codes are being retrieved, a "One
moment please KOEO test is in
progress..." message shows on the
Scan Tool's LCD display.
As soon as the ignition is turned "on", the vehicle's computer
enters the Self-Test mode. Clicking sounds will be heard
coming from the engine. This is normal. It indicates that the
vehicle's computer is activating relays, solenoids, and other
components to check their operation.
WARNING: On some vehicles equipped with an Electric
Cooling Fan, the computer activates the cooling fan to check
its operation. To avoid injury, keep hands or any part of your
body a safe distance from the engine during this test.
If the Scan Tool fails to link to the
vehicle's computer, a "Vehicle is not
responding" message shows on the
Scan Tool's LCD display. Do the
following:
- Verify the ignition is ON.
- Check the cable connections at
the Scan Tool and at the vehicle's
DLC.
- Turn the ignition OFF, wait 10 seconds, then turn back ON to
reset the computer.
