Electronic Control System Troubleshooting Precautions

ELECTRONIC CONTROL SYSTEM TROUBLESHOOTING PRECAUTIONS
^ Before removing sequential multi-port fuel injection system (SFI) wiring connectors, terminals, etc., first disconnect the power by either turning the ignition switch OFF or disconnecting the battery terminals.

HINT: Always check the diagnostic trouble code before disconnecting the battery terminals.

^ When installing the battery, be especially careful not to reverse the connections of the positive (+) and negative (-) cables.
^ Do not permit parts to receive a severe impact during removal or installation. Handle all SFI parts carefully, especially the electronic control module (ECM).
^ Do not be careless during troubleshooting as there are numerous transistor circuits and even slight terminal contact can cause further troubles.
^ Do not open the ECM cover.
^ When inspecting during rainy weather, take care to prevent entry of water. Also, when washing the engine compartment, prevent water from getting on the SFI parts and wiring connectors.
^ Parts should be replaced as an assembly.
^ Care is required when pulling out and inserting wiring connectors.



- Release the lock and pull out the connector, pulling on the connectors.



- Fully insert the connector and check that it is locked.



^ Use the special service tool (SST 09842-30060) for inspection or test of the injector or its wiring connector.