Electronic Control System

PRECAUTION

1. BEFORE WORKING ON FUEL SYSTEM, DISCONNECT NEGATIVE (-) TERMINAL CABLE FROM BATTERY

HINT: Any diagnostic trouble code retained by the ECM will be erased when the battery negative (-) terminal cable is removed from the battery.
Therefore, if necessary, read the diagnostic trouble code(s) before removing the negative (-) terminal cable from the battery.

2. DO NOT SMOKE OR WORK NEAR AN OPEN FLAME WHEN WORKING ON FUEL SYSTEM
3. KEEP GASOLINE AWAY FROM RUBBER OR LEATHER PARTS
4. ELECTRONIC CONTROL SYSTEM
(a) Before removing MFI wiring connectors, terminals, etc., first disconnect the power by either turning the ignition switch to LOCK or disconnecting the negative (-) terminal cable from the battery.

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

(b) When installing the battery, be especially careful not to incorrectly connect the positive (+) and negative (-) cable terminals.
(c) Do not permit parts to receive a severe impact during removal or installation. Handle all MFI parts carefully, especially the ECM.
(d) Do not be careless during troubleshooting as there are numerous transistor circuits and even slight terminal contact can further troubles.
(e) Do not open the ECM cover.
(f) When inspecting during rainy weather, take care to prevent entry of water. Also, when washing the engine compartment, prevent water from getting on the MFI parts and wiring connectors.
(g) Parts should be replaced as an assembly.
(h) Care is required when pulling out and inserting wiring connectors.
(1) Release the lock and pull out the connector, pulling on the connectors.
(2) Fully insert the connector and check that it is locked.
(i) When inspecting a connector with a volt/ohmmeter.
(1) Carefully take out the water-proofing rubber if it is a water-proof type connector
(2) Insert the test probe into the connector from wiring side when checking the continuity, amperage or voltage.
(3) Do not apply unnecessary force to the terminal.
(4) After checking, install the water-proofing rubber on the connector securely.





(5) Use SST for inspection or test of the injector or its wiring connector.
SST 09842-3O070