Mercury Optimax Diagnostic Guide., Page 27Get this manual
OPTIMAX DIAGNOSTIC GUIDE
Procedure 18
DIRECT INJECTOR LOAD TEST
Using the OUTPUT LOAD TEST function, you can exercise the ECM and various output loads (ignition coils, injectors, pumps, horn, etc controlled by the ECMMake sure that the SELECT FUNCTION menu screen is displayed on the DDTPress the keySelect Function: 1-OIL PUMP PRIME 2-CYLINDER MISFIRE 3-OUTPUT LOAD TEST 4-RESET BREAK-IN OIL
The SELECT LOAD TEST screen will appearSelect Load Test: 1-IGNITION 2-FUEL INJECTOR 3-DIRECT INJECTOR
This test is run with key switch in the RUN position only (engine off)To test the direct injector for mechanical activity press the keyDISCONNECT POWER TO HIGH PRESSURE FUEL PUMP PRESS TO CONTINUE Press the1 keyLISTEN FOR INJECTOR OPENING AND CLOSING DURING THIS TESTCONTINUE? 1=YES 2=NO Press the1 keyENGINE ISN'T RUNNING DURING THIS TESTPRESS TO CONTINUE PRESS MODE TO CANCEL Press the1 keySELECT CYL TO TEST: 12345678 PRESS MODE TO CANCEL Press the1 key