Instrumentation 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. 21197 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. 7743722 - Downloaded from www.volvopenta.com 13/05/2008 20:17:06 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. 24 VPA 7743722 English 10-2004