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Ford OBD1 Systems<br />
ADDITIONAL TESTS FOR EEC-IV SYSTEMS - CYLINDER BALANCE TEST<br />
� See VIEWING DTCs IN THE CANOBD2&1 SCAN TOOL’S<br />
MEMORY on page 13 to view DTCs stored in the CanOBD2&1<br />
<strong>Scan</strong> <strong>Tool</strong>'s memory.<br />
All retrieved DTCs will remain in the CanOBD2&1 <strong>Scan</strong> <strong>Tool</strong>'s<br />
memory. If the KOER Test procedure is performed again,<br />
DTC's from a prior test will automatically clear and will be<br />
replaced by the most current DTCs retrieved.<br />
13. All KOER codes that are retrieved by the CanOBD2&1 <strong>Scan</strong> <strong>Tool</strong><br />
during the KOER Self-Test represent problems that are present now<br />
(at the time the test is performed). The related vehicle problems that<br />
caused the codes to be sent must be repaired using the procedures<br />
described in the vehicle's repair manual.<br />
The green, yellow and red LEDs are used (with the LCD<br />
display) as visual aids to make it easier to determine engine<br />
system conditions. See SERVICING DTCs - OBD I on page<br />
110 for information on interpreting LEDs and servicing DTCs.<br />
14. After all repairs have been completed, repeat the KOER Self-Test.<br />
15. If a "pass code" (code 11 or 111) is<br />
received, it indicates that the repairs<br />
were successful and all the related<br />
systems are working properly.<br />
16. If a "pass code" (code 111 or 111) is not<br />
received, the repair was unsuccessful.<br />
Consult the vehicle's service manual<br />
and recheck repair procedure.<br />
ADDITIONAL TESTS FOR EEC-IV SYSTEMS<br />
These tests are additional, supplemental tests, and are not<br />
needed to retrieve Diagnostic Trouble Codes. Ford has<br />
included them to further assist the technician / do-it-yourselfer<br />
in the troubleshooting of vehicle problems.<br />
Cylinder Balance Test (Vehicles equipped with Sequential<br />
Electronic Fuel Injected (SEFI) systems only)<br />
The Cylinder Balance Test assists in finding a weak or noncontributing<br />
cylinder. The computer shuts off fuel (cuts off power to injectors) to each<br />
cylinder, in sequence, and monitors for RPM changes (drop). Based on<br />
this information, the computer determines if all the cylinders are<br />
contributing power equally (for proper engine operation), or if some<br />
cylinders are only contributing partially or not contributing at all.<br />
SEFI Introduction<br />
Sequential Electronic Fuel Injection (SEFI) belongs to a family of fuel<br />
injection systems called "Multi-port/Multipoint Fuel Injection". Multi-port<br />
(MFI) fuel injection systems contain one fuel injector per cylinder, and<br />
the vehicle's computer electronically controls their operation. On some<br />
multi-port fuel injection systems, the injectors all fire at the same time<br />
88 CanOBD2&1
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