Equus 3140 - Scan Tool CanOBD2&1 Kit - Manual (Page 80)

78 CanOBD2&1
E
Ford OBD1 Systems
ADDITIONAL TESTS FOR EEC-IV SYSTEMS
Most Ford EEC-IV vehicle computers up to 1991 use a two-
digit code system. From 1991 to 1995 most use a three-digit
code system.
11. If no problems are found during the
KOER Self-Test, the computer sends a
"PASS code" (code 11 or 111) to the
CanOBD2&1 Scan Tool. Code 11 or 111
indicates that all the relays and actua-
tors and their related circuits that were
tested during the KOER Self-Test are
OK, and no faults were found.
12. After the CanOBD2&1 Scan Tool retrieves all the KOER Self-Test
DTCs, turn the engine off, and disconnect the CanOBD2&1 Scan
Tool from the vehicle's test connectors. The DTCs retrieved are now
stored in the CanOBD2&1 Scan Tool's memory.
■ See Viewing DTCs in the CanOBD2&1 Scan Tool's Memory
on page 14 to view DTCs stored in the CanOBD2&1 Scan Tool's
memory.
All retrieved DTCs will remain in the CanOBD2&1 Scan Tool's
memory. If the KOER Test procedure is performed again,
DTC's from a prior test will automatically clear and will be
replaced by the most current DTCs retrieved.
13. All KOER codes that are retrieved by the CanOBD2&1 Scan Tool
during the KOER Self-Test represent problems that are present now
(at the time the test is performed). The related vehicle problems that
caused the codes to be sent must be repaired using the procedures
described in the vehicle's repair manual.
The green, yellow and red LEDs are used (with the LCD display)
as visual aids to make it easier to determine engine system con-
ditions. See Servicing Diagnostic Trouble Codes on page 100
for information on interpreting LEDs and servicing DTCs.
14. After all repairs have been completed, repeat the KOER Self-Test.
15. If a "pass code" (code 11 or 111) is
received, it indicates that the repairs
were successful and all the related sys-
tems are working properly.
16. If a "pass code" (code 111 or 111) is not
received, the repair was unsuccessful.
Consult the vehicle's service manual
and recheck repair procedure.
ADDITIONAL TESTS FOR EEC-IV SYSTEMS
These tests are additional, supplemental tests, and are not
needed to retrieve Diagnostic Trouble Codes. Ford has
included them to further assist the technician / do-it-your-
selfer in the troubleshooting of vehicle problems.