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Home >> Ford >> 1990 >> Bronco II RWD, Standard, M5OD-R1 >> Repair and Diagnosis >> Engine Performance >> System >> Engine Controls - Tests W/Codes >> Quick Test >> Step 6.0 KOEO Code-To-Test Chart
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Step 6.0 KOEO Code-To-Test Chart

Starting with the lowest On-Demand code, use the chart to locate the proper pinpoint test for the applicable engine. All tests are in the format "Test/Step". For example, if you see "QB3", proceed to pinpoint test QB (TEST QB - KOEO OR CONTINUOUS MEMORY SERVICE CODE 15) and start at step #3. Be sure to read the Introduction proceeding step #1 for important supplementary information and resources.

The chart is hyperlinked for your convenience. Each link jumps to the start of the test (introduction area) proceeding step #1, not to the specified step number itself.

Since just one hyperlink can exist on a line, only the left-most pinpoint test identifier is linked. If another engine uses the same test but is not linked, use the same left-most hyperlink.

After service, rerun the Quick Test to ensure that service was effective.

To find out the meaning of any code, see the CODE DEFINITION TABLES .

ON-DEMAND (KOEO) CODE-TO-TEST CHART: TRUCK (1)

KOEO On-Demand Code 2.3LVIN [A] 2.9LVIN [T] Fed. 2.9LVIN [T] Cal. 3.0LVIN [U] 4.0LVIN [X] 4.9LVIN [Y] 5.0LVIN [N] (2) 5.8LVIN [H] 7.3LVIN [M] 7.5LVIN [G]
15 QB3 QB3 QB3 QB3 QB3 QB3 QB3 QB3 QB3 QB3
16 -- -- -- -- N2 -- -- -- -- --
19 QD5 QD5 QD5 QD5 QD5 QD5 QD5 QD5 QD5 QD5
21 DA1 DA1 DA1 DA1 DA1 DA1 DA1 DA1 -- DA1
22 DF1 DF1 DF1 DF1 DF1 DF1 DF1 DF1 DF1 DF1
23 DH1 DH1 DH1 DH1 DH1 DH1 DH1 DH1 DQ1 DH1
24 DA1 DA1 DA1 DA1 DA1 DA1 DA1 DA1 -- DA1
26 DC1 -- DC1 -- DC1 TC30 TC30 TC30 TC30 TC30
31 DN1 -- -- -- -- DN1 DN1 DN1 -- DN1
32 DN25 -- -- -- -- DN25 DN25 DN25 -- DN25
34 DN20 -- -- -- -- DN20 DN20 DN20 -- DN20
35 DN5 -- -- -- -- DN5 DN5 DN5 -- DN5
47 -- -- -- -- -- TC10 TC30 TC10 TC10 TC10
51 DA10 DA10 DA10 DA10 DA10 DA10 DA10 DA10 -- DA10
52 FF1 -- -- FF1 -- FF1 FF1 -- -- --
53 DH3 DH3 DH3 DH3 DH3 DH3 DH3 DH3 DQ2 DH3
54 DA10 DA10 DA10 DA10 DA10 DA10 DA10 DA10 -- DA10
56 DC20 -- DC20 -- DC20 TC40 TC40 TC40 TC40 TC40
61 DA20 DA20 DA20 DA20 DA20 DA20 DA20 DA20 -- DA20
63 DH10 DH10 DH10 DH10 DH10 DH10 DH10 DH10 DQ10 DH10
64 DA20 DA20 DA20 DA20 DA20 DA20 DA20 DA20 -- DA20
66 DC10 -- -- -- -- TC50 TC50 TC50 TC50 TC50
67 FA1 FA1 FA1 FA1 FA1 FA1 FA1 FA1 FA1 FA1
79 -- -- FA10 -- FA10 -- -- -- -- --
81 -- -- -- -- -- KC8 KC8 KC8 -- --
82 -- -- -- -- -- KC8 KC8 KC8 -- KC8
84 DN10 -- -- -- -- DN10 DN10 DN10 -- DN10
85 -- -- -- KD6 KD6 KD6 -- KD6 -- KD6
86 TB1 TB1 TB1 TB1 TB1 -- -- -- -- --
87 J7 J7 J7 J7 J7 J7 J7 J7 -- J7
89 TB1 TB1 TB1 TB1 TB1 -- -- -- -- --
91 -- -- -- -- -- TC17 TC17 TC17 TC17 TC17
92 -- -- -- -- -- TC17 TC17 TC17 TC17 TC17
93 -- -- -- -- -- TC17 TC17 TC17 TC17 TC17
94 -- -- -- -- -- TC17 TC17 TC17 TC17 TC17
95 J20 J20 J20 J20 J20 J20 J20 J20 -- J20
96 J30 J30 J30 J30 J30 J30 J30 J30 -- J30
97 -- -- -- -- -- TC10 TC10 TC10 TC10 TC10
98 -- -- -- -- -- TC17 TC17 TC17 TC17 TC17
99 -- -- -- -- -- TC17 TC17 TC17 TC17 TC17
(1) If no codes or codes not listed, go to test QA1. "--" means code does not apply for this engine. "Cal." means California.
(2) 5.0 information has been updated to reflect Ford TSB 89-25A-14.