Transmission Control Systems: Service Precautions

ELECTRONIC CONTROL SYSTEM

CAUTION:
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 terminal cables from the battery.

NOTE: Always check the diagnostic trouble code before disconnecting the terminal cable from the battery.

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. Take great care during troubleshooting as there are numerous transistor circuits and even slight terminal contact 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. Care is required when pulling out and inserting wiring connectors.
(a) To pull the connector out, release the lock and pull on the connector.
(b) Fully insert the connector and check that it is locked.
9. When inspecting a connector with a volt/ohmmeter.
(a) Carefully take off the water-proofing rubber if it is a water-proof type connector.
(b) Insert the tester probe into the connector from the wiring side when checking the continuity, amperage or voltage.
(c) Do not apply unnecessary force to the terminal.
(d) After checking, securely install the water-proofing rubber on the connector.





10. Use Special Service Tool (SST) Wiring "F" EFI Inspection # 09842-30070 or equivalent for inspection or test of the injector its wiring connector.