Electronic Component Handling

CAUTION





1. Before connecting or disconnecting E.C.U. harness connector to or from any E.C.U., be sure to turn the ignition switch to the "OFF" position and disconnect the negative battery terminal in order not to damage E.C.U., as battery voltage is applied to E.C.U. even if ignition switch is turned off. Otherwise, there may be damage to the E.C.U.





2. When performing E.C.U. input/output signal inspection, remove pin terminal retainer from 20 and 16 pin connector to make it easier to insert tester probe into connector.





3. When connecting pin connectors into E.C.U. or disconnecting them from E.C.U., take care not to damage pin terminal of E.C.U. (Bend or break).
4. Make sure that there are not any bends or breaks on E.C.U. pin terminal, when connecting pin connectors into E.C.U.





5. Before replacing E.C.U., perform E.C.U. input/output signal inspection and make sure whether E.C.U. functions properly or not.





6. After performing this "ELECTRONIC CONTROL SYSTEM INSPECTION", perform E.C.C.S. self.diagnosis and driving test.





7. When measuring supply voltage of E.C.U. controlled components with a circuit tester, separate one tester probe from the other.
If the two tester probes accidentally make contact with each other during measurement, the circuit will be shorted, resulting in damage to the power transistor of the control unit.






Keys to Symbols