Power Supply and Ignition Switch-IG

CIRCUIT DIAGRAM






INSPECTION USING SCAN TOOL















HARNESS INSPECTION PROCEDURE

MULTIPORT FUEL INJECTION (MFI) RELAY INSPECTION






Caution: When applying battery voltage directly, make sure that it is applied to correct terminal. Otherwise, the relay could be damaged.

(1) Remove the MFI relay.






(2) Using jumper wires, connect terminal (10) of MFI relay to battery (+) terminal and terminal (8) of MFI relay to battery (-) terminal.






(3) Connecting and disconnecting the jumper wire to battery (-) terminal, measure the voltage across terminals (4) and (5) of the MFI relay.






(4) Using jumper wires, connect terminal (9) of MFI relay to battery (+) terminal and terminal (6) of MFI relay to battery (-) terminal.





(5) Connecting and disconnecting the jumper wire to battery (-) terminal, check the continuity across terminals (2) and (3) of the MFI relay.






(6) Using jumper wires, connect terminal (3) of MFI relay to battery (+) terminal and terminal (7) of MFI relay to battery (-) terminal.






(7) Connecting and disconnecting the jumper wire to battery (-) terminal, measure the voltage at terminal (2) of the MFI relay.
(8) Replace the MFI relay if any defect is evident.