Engine Protection Mode; Engine Control Module (Ecm) - Volvo Penta 3.0GLP-C Owner's Manual

Instrumentation
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Engine Protection Mode

In a low oil pressure, low voltage, engine overheat, or
lack of exhaust cooling water situation, the Electronic
Fuel Injection (EFI) system will enter an Engine Pro-
tection Mode (EPM). In such cases, if an acoustic
alarm has been installed with your engine, the alarm
(located beneath the dashboard) will sound to notify
you of a malfunction.
Under these conditions, engine operation is limited to
2500 RPMs or less. When the EFI system switches on
the EPM, there will be a temporary reduction in power
until the problem is resolved. In this mode, ignition tim-
ing is also adjusted in response to the situation. If the
engine drops below 1200 RPMs, normal injector oper-
ation and spark timing resume. The engine may now
be operated normally, as long as engine speed re-
mains below 2500 RPMs.
For anything above 2500 RPMs, the engine will dis-
play poor running characteristics. If the engine is run
above 2500 RPMs without any load or with the drive
in neutral, the engine will exhibit surging.
NOTE! Continuing to run the engine in this mode
without correcting the cause may result in
further engine damage.
Use the oil pressure and water temperature gauges to
verify a problem exists, then inspect the engine crank-
case for proper oil level and check the water inlets for
obstructions. The low oil pressure/engine overheat
problem must be corrected before the engine will re-
turn to normal operation.
To reset the Engine Protection Mode after the prob-
lem is corrected, allow the engine to cool and then
continue with normal operation.
NOTE! If the problem continues, contact your Volvo
Penta dealer and have the engine inspect-
ed.

Engine Control Module (ECM)

The engine control module (ECM) is designed to
maintain exhaust emission levels while maintaining
excellent drivability and fuel efficiency. The ECM con-
trols the following conditions:
•
Fuel, ignition, and idle air control.
•
Knock sensor system.
•
Various other discrete outputs.
NOTE! Until the engine coolant reaches normal op-
erating temperatures, the RPM rev-limit is
reduced to maximize engine life.
VPA 7743722 English 10-2004