EEC III - Revised Quick Test/Self-Test Procedures
83ford23 Article No. 83-3-25EEC III - REVISED "QUICK TEST"/ "SELF-TEST" PROCEDURES - VEHICLES UNDER 8500 GVW WITH 5.8L EEC ENGINES BUILT AFTER MARCH 1, 1983
LIGHT TRUCKS 1983 F SERIES AND BRONCO
CALIBRATIONS: 1-63T-R15, 1-64T-R15, 2-63Y-R14, 2-64Y-R15
Approximately March 1, 1983, the 5.8L engine calibrations used in under 8500 lb. GVW Light Trucks were revised to the above listed calibration levels. These new calibrations require a new procedure for conducting the "quick test"/"self-test". Failure to use the new testing procedures will cause a properly functioning system to produce a code 44 rather than the correct code of 11. The new test procedures, if followed correctly on a properly functioning system, will produce Code 11.
Referring to Section 24 (EEC III) of Part II of the 1983 Car/Truck Shop Manual - Emission Diagnosis - Engine Electronics apply the following revisions to determine if the EEC system used on the above calibrations is functioning properly.
NOTE: Do not use this revised procedure on other than the listed calibrations.
1. QUICK TEST PROCEDURE
The new calibrations delete the EEC III Throtte Kicker control on the subject engines, so changes must be made to the following EEC III Quick Test and Pinpoint Test steps.
A. Page 24-31 Step 15 - Disregard parts on "TKS Light Pattern" and do not go to section J.
B. Page 24-33 Step 18 - Disregard the parts on "TKS Lights & TK Movement". To indicate self-starting, observe TAB and/or TAD lights. If either or both of these lights begin turning on and off within a minute, go to Step 19. If both lights do not turn on and off, replace the processor and retest. If not OK, replace the calibration assembly using the original processor and retest. Do not go to Steps J8 or J11.
C. Page 24-33 Step 19 - Disregard the parts on "TK Extended" and use the TAB or TAD lights as outlined for Step 18.
D. Page 24-34 Step 22 - Disregard the parts "TKS
Lights Switching". To indicate self-test is complete, look for 2 pulses on both TAB and TAD lights, then go to Step 23. If both lights never pulse twice (allow 3 minutes after starting self-test) replace, calibration assembly. Do not go to Step J16.
Pinpoint Test
E. Section J Throttle Kicker - Disregard Steps J1 (page 24-147) through J16 (page 24-154). Do not use any of these steps for these calibrations. It is still permissable, however, to use Steps J17 and J18.
F. Section N Step N2 (page 24-174) - If idle within specification, do not go to step N3 but instead go to Step N4.
G. Section N Step N3 (page 24-174) - Disregard this step and do not use for these calibrations.
2. NEW SELF-TEST PROCEDURE
As previously mentioned above, if the following procedure is not followed, a Code 44 will be produced which is not a firm indication that the system is functioning properly. It should also be noted that if the new test procedure is not used, and the system produces Code "11", the system is not operating properly and the following checks should be made: verify that vacuum hoses are properly connected and that no leaks are present, that no "shorts-to-ground" exist in Circuit 100 or the TAB Solenoid (Key On-Engine Off) and that the Thermactor System and its components are functioning properly.
Figure 29:
A. After connecting the EEC III tester, refer to Figure 29 and disconnect the vacuum cap from the "TEE" at the thermactor bypass valve. Remove the manifold vacuum line (black with red trace) from the air cleaner bi-metal sensor and install a 5/32" vacuum connector in the end of the hose. Connect approximately 2 ft. of 5/32" hose between the connector and tee.
B. Proceed with Quick Test at step 3. The only difference that will be seen is with the Throttle Kicker, as previously described. An "11" service code will be generated if the EEC III System is OK. If any other service codes are displayed, including also a "44" code, go to the referenced Pinpoint Test.
3. After all testing and/or services are done, remove the 2' test hoses and 5/32 connector, re-cap the tee at the bypass valve and re-install manifold vacuum to the air cleaner bi-metal.
OTHER APPLICABLE ARTICLES: None
WARRANTY STATUS: "INFORMATION ONLY"