Merc manual v5 - Pirate4x4.Com

MerCruiser PCM-555 EFI
2) After selecting the “Auto Self Test“ function from the PCM Functions menu the
scanner will begin to display several warning messages. Review these messages
and be certain their instructions are followed.
3) When the warning messages have been displayed, you may begin the Auto Self
Test by pressing the YES key. This action will initiate a series of engine actuator
and sensor tests. The entire testing process may take several minutes to complete.
While the Auto Self Test is in progress the scanner’s display will indicate the type
of test being performed.
To Abort the Auto Self Test at any time, press and hold the
scanner’s NO key.
4) When the Auto Self Test has completed, the scanner will automatically
interrogate the PCM’s fault code memory and report any errors that have
occurred. A successful self test will report no errors.
PCM Function - Output Tests
The Output Test menu provides a technician with the ability to exercise various PCM
actuators and controls in order to verify correct operation.
Available output tests are:
Fuel Injectors
Fuel Pump Relay
Ignition Coils
Warning Horn
Tach Output
The sections presented on the following pages will provide specific details on each
output test.
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