Equus 3120 - OBD 2&1 Tool Kit - Manual (Page 50)

48 OBD2 & 1
E
Ford OBD1 Systems
CODE RETRIEVAL PROCEDURES - KOEO TEST
As described previously, some tests are designed to detect problems
only when the vehicle is in normal operation. Some tests are designed
to activate components and detect problems only with the Key On and
Engine Off. Other tests are designed to activate components and test
their operation only with the Key On and Engine Running.
Do not take
short cuts. If you fail to perform a test, or you perform a test out of
sequence, you might miss a problem that is only detected during that
part of the test.
Key On Engine Off (KOEO) Test
During the KOEO Self-Test, two groups of codes are retrieved by the
Tool.
■ The first group of codes retrieved by the Tool are called "KOEO
codes". A "KOEO" icon will show in the upper right corner of the LCD
display to indicate that the code retrieved is a "KOEO" code.
■ The second group of codes are called "Continuous Memory" codes.
A "CM" icon will show in the upper right corner of the LCD display
to indicate that the code retrieved is a "Continuous Memory" code.
Check your vehicle thoroughly before performing any test.
See Before You Begin on page 17 for details.
ALWAYS observe safety precautions whenever working on a
vehicle. See Safety Precautions on page 3 for more infor-
mation.
1. Locate the vehicle's Data Link Connector (DLC). See Data Link
Connector (DLC) on page 46 for connector location.
Some DLCs have a plastic cover that must be removed
before connecting the Tool's cable connector.
2. Connect the Tool cable (with the Ford
Connector Cable Adaptor attached) to
the Tool, then connect the adaptor to the
vehicle's DLC. Press the POWER/LINK
button to turn the Tool ON, then
press the ENTER/FF button to con-
tinue.
■ The Ford EEC-IV System menu dis-
plays.
Use the and buttons, as
necessary, to make menu selec-
tions.
3. From the Ford EEC-IV System menu,
highlight KOEO Test, then press the ENTER/FF button.
4. Start and warm-up engine to normal operating temperature. Press
the ENTER/FF button to continue.