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Ford OBD1 Systems<br />
CODE RETRIEVAL PROCEDURES - KOER TEST<br />
5. When prompted, turn off all vehicle<br />
accessories, turn ignition key OFF and<br />
wait for the on screen prompt. If you<br />
wish to exit the KOER test at this time,<br />
press the LD/M button.<br />
6. When instructed by the message on the<br />
Tool's display, start the engine and<br />
press the ENTER button to continue.<br />
A "One moment please KOER test is in<br />
progress..." message shows temporarily<br />
on the Tool's LCD display.<br />
7. The Tool will retrieve the Cylinder<br />
Identification (ID) Code. The Cylinder ID<br />
Code identifies the number of cylinders<br />
for the vehicle under test.<br />
� If the Tool cannot retrieve the<br />
Cylinder ID Code, an advisory<br />
message displays. Press the LD/M<br />
button to exit and repeat the<br />
Key On Engine Off (KOEO) test<br />
(page 66) until DTC 11 or 111<br />
displays.<br />
8. Perform the following procedures when<br />
prompted by the message on the Tool's<br />
display.<br />
� Turn the steering wheel 1/2 turn to<br />
right, hold for four seconds and<br />
release.<br />
� Press the brake pedal to the floor<br />
and then release it.<br />
� Cycle the Overdrive Switch (if equipped).<br />
� Quickly press the accelerator pedal<br />
to the floor and then release it.<br />
9. After the above procedures are<br />
performed a "One moment please<br />
KOER test is in progress..." message<br />
shows temporarily on the Tool's LCD<br />
display, followed by a "Retrieving<br />
codes" message.<br />
Most Ford EEC-IV vehicle computers up to 1991 use a twodigit<br />
code system. From 1991 to 1995 most use a three-digit<br />
code system.<br />
OBD2&1 73
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