MerCruiser PCM-555 EFI
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Warning Horn Output Test (non-DTS systems only)
This test will cause the PCM to energize the engine warning horn. The warning
horn will be activated for a period of one second.
• This test should be performed with Key-On and Engine Off.
1) Review the advisory message stated above and be sure the engine is not run-
ning when attempting to perform this test.
2) After selecting the “Warning Horn“ test from the PCM Output Test menu the
scanner will prompt you to begin the test. To initiate the test press the TEST
key. The warning horn will be activated for approximately one second.
3) You may press the TEST key again to repeat the test or press the NO key to
return to the Output Test menu.
Throttle Motor Test (DTS systems only)
This test allows a technician to check the functionality of the engine’s electronic
throttle actuator motor. The test allows the throttle blade to be moved in 5 degree
increments using the scan tool’s
▲
and
▼
keys and also displays the current TPS
voltages and TPS percent in real-time.
• This test must be performed with Key-On, Engine Off
Follow the scan tool’s on screen prompts to proceed with the test.
• Press and hold the NO key on the scan tool’s keypad to stop the test
at any time.
Gear Shift Motor Test (DTS systems only)
This test allows the technician to test the functionality sterndrive’s shift actuator
mechanism by commanding it to move into the Forward and Reverse positions.
• WARNING: This test causes the vessel’s sterndrive to shift into for-
ward and reverse, thereby causing the vessel to move.
• This test must be performed in NEUTRAL with the engine IDLING.
• Refer to the engine manufacturer’s safety instructions PRIOR to
performing this test.
• Vessel should be secured to prevent movement.
After referring to the manufacturer’s instructions and safety procedures for this
procedure, follow the scan tool’s on screen prompts to proceed with the test.
• Press and hold the NO key on the scan tool’s keypad to stop the test
at any time.
Summary of Contents for TechMate Pro
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