Computers and Control Systems

1. Before removing Multiport Fuel Injection (MFI) wiring connectors, terminals, etc., first disconnect the power by either turning the ignition switch OFF or disconnecting the battery terminals.





2. When installing the battery, be especially careful not to incorrectly connect the positive (+) and negative (-) cables.
3. Do not permit parts to receive a severe impact during removal or installation. Handle all MFI parts carefully, especially the Engine Control Module (ECM).
4. Do not be careless during troubleshooting as there are numerous transistor circuits and contact with terminals can cause further trouble.
5. Do not open the ECM cover.
6. When inspecting during rainy weather, take care to prevent the entry of water. Also, when washing the engine compartment. prevent water from getting on the MFI parts and wiring connectors.
7. Parts should be replaced as an assembly.
8. Take care when pulling out or inserting wiring connectors.





^ Release the lock and pull out the connector. Pull on the connectors, not the wires.





^ Fully insert the connector and check that it is locked.
9. When inspecting a connector with a volt/ohmmeter:





^ Carefully take off the water-proofing rubber if it is a water-proof type connector.





^ Insert the tester probe into the connector from the wiring side when checking the continuity, amperage or voltage.
^ Do not apply unnecessary force to the terminal.
^ After checking, install the water-proofing rubber securely on the connector.





10. Use SST for inspecting or testing the injector or its wiring connector. (SST 09842-30070)