Electronic Control System Precautions

ELECTRONIC CONTROL SYSTEM
1. Before removing EFI wiring connectors, terminals, etc., first disconnect power by either turning OFF the ignition switch or disconnecting the battery terminals.
2. When installing a 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 EFI parts carefully, especially the ECU.
4. Do not be careless during troubleshooting as there are numerous transistor circuits and even slight terminal contact can cause damage.
5. Do not open the ECU cover.
6. When inspecting during rainy weather, take care to prevent entry of water. Also, when washing the engine compartment, prevent water from getting on the EFI parts and wiring connectors.
7. Parts should be replaced as an assembly.





8. Take care when pulling out and inserting wiring connectors.
(a) Release the lock and pull out the connector.

NOTE: Grasp the connector, not the wire.





(b) Fully insert the connector and insure that it is locked.





9. When inspecting a connector with a circuit tester.
(a) For water-proof type connectors, carefully take out the water-proofing rubber.





(b) When checking continuity, amperage or voltage, always insert tester probe into the connector from the wiring side.
(c) Do not apply unnecessary force to the terminal.
(d) After checking, install the water-proofing rubber on the connector securely.





10. Use SST for inspection or test of the injector, cold start injector or its wiring connector.