Equus 3145 - Digital Ford Code Reader (1981 - 1995) - Manual (Page 47)

Retrieving Codes
ADDITIONAL TESTS FOR EEC-IV SYSTEMS
Chapter 4 44
B: If a cylinder problem code (Code 20 in example B in TEST
RESULTS CHART) is retrieved the 1st time the test is
performed, repeat the test again. If the system passes the
2nd time (Code 90) the test is performed, testing is
complete. Consult the Test Chart for “Problem Indication”
and “Possible Cause”, then proceed to step 8.
• In example B, the test results show that cylinder #2
failed the test the first time but passed the 2nd time,
indicating that #2 cylinder is firing but not
contributing the same as the other cylinders.
C: If a cylinder problem code (Code 20 in example C in TEST
RESULTS CHART) is retrieved the 1st and 2nd time the
test is performed, repeat the test for a 3rd time. If the
system passes on the third time (Code 90), testing is
complete. Consult the Test Chart for "Problem Indication"
and "Possible Cause" and proceed to step 8.
• In example C, the test results show that cylinder #2
failed the 1st and 2nd tests but passed on the 3rd test.
This indicates that the cylinder is firing but not
contributing the same as the other cylinders. The test
results also show that in example C the problem is
more severe than in example B.
D: If a cylinder problem code (Code 20 in example D in TEST
RESULTS CHART) is retrieved the 1st, 2nd and 3rd time
the test is performed, testing is complete. Consult the Test
Chart for “Problem Indication” and “Possible Cause”, then
proceed to step 8.
• In example D, the test results show that # 2 cylinder
failed the 1st, 2nd and 3rd tests. This indicates that
cylinder #2 is extremely weak or dead, and there is
very little or no power contribution to engine
operation coming from this cylinder.
8. Turn the ignition off and disconnect the Code Reader from
the test connectors. The Cylinder Balance Test results are
now in the Code Reader's memory.
9. To view the Cylinder Balance Codes stored in the Code
Reader's memory, press the ON/OFF button to turn the
Code Reader on, then press and release the MEMORY
button; the first stored code will display. Continue pressing
and releasing the MEMORY button to scroll through the
stored codes until all the codes have been displayed.
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