Scan Tool Testing and Procedures

ECI SYSTEM INSPECTION BY USING ECI CHECKER
The electric system of ECI system can be quickly inspected and maintained if the electric Input and output signals to ECU are checked by ECI checker and the component whose abnormality is indicated by the signal and the harness connected between ECU and the component is checked as well. Using the special tools (test harness and ECI checker), perform the ECI system checks by the following procedure.

CAUTION: Perform these checks after completion of all steps in ( "How to Read and Display Diagnostic Trouble Codes" - "With and Without Scan Tool" ). Reading and Clearing Diagnostic Trouble Codes




CHECK STEPS
STEP 1
(1) Turn ignition switch to LOCK.
(2) Remove the ECU cover.
(3) Disconnect the large harness connector and small harness connector from the ECU.
(4) Set check switch of the ECI checker to OFF.
(5) Set select switch of the ECI checker to A.
(6) Connect white color connectors labeled "CHECKER" of the harness connector to the ECI checker connectors. Then connect harness connector to the ECU and harness connectors.
(7) Perform checks according to the "ECI System Check Procedure Chart Step 1.

STEP 2
(8) Turn ignition switch to LOCK.
(9) Set check switch of the ECI checker to OFF.




(1O) Disconnect white color connectors labeled "CHECKER" of the harness connector from the ECI checker. Then connect green color connectors labeled "CHECKER" of the harness connector to the connectors of ECI checker.
(11) Perform checks according to the "ECI System Check Procedure Chart Step 2".
(12) If checker shows any deviation from specifications, check the corresponding sensor and related electrical wiring. Repair or replace if necessary.
(13) After repair or replacement, recheck with the ECI checker to confirm that the repair has removed the problem.
(14) Set the ignition switch to LOCK.
(15) Set the check switch of the ECI checker to OFF.
(16) Disconnect the connectors of the ECI checker and the harness connector from the ECU and body side harness connectors. Make certain that the power supply has been removed from ECU for at least 15 seconds. This will erase the memory.
(17) Connect the body side harness connector to the ECU.
(18) After completion of the above test, perform a road test to be sure that the trouble has been eliminated.

ECI SYSTEM CHECK PROCEDURE CHART







STEP 1







STEP 2