20997341 Volvo.Penta Fuel pump

Engine Functions
Electronic GoverningAn electronic governor with a full speed range is used. The electronic governor is isochronous at Low Idle through High Idle or the programmed top engine limit. The electronic control system has full control of the fuel delivery to the engine. Fuel To Air Ratio Control (FARC)The mechanical Fuel Ratio Control is eliminated. Electronic control of the fuel to air ratio provides optimum performance while limiting emissions. Fuel Injection TimingFuel injection timing varies as a function of engine operating conditions to optimize the engine performance. Engine performance is determined by the following conditions:* cylinder pressure* emissions* exhaust temperature* fuel consumption Shaping of Torque RiseElectronic controls provide increased flexibility to customize the torque curve over a wide range of engine speeds.Programmable Monitoring System
The Programmable Monitoring System determines the level of action that is taken by the ECM in response to a condition that can damage the engine. These conditions are identified by the ECM from the signals that are produced from the following sensors:* Inlet Air Temperature Sensor* Coolant Temperature Sensor* Oil Pressure Sensor* Transmission Oil Temperature Sensor (if installed)* Transmission Oil Pressure Sensor (if installed)The Transmission Oil Pressure Sensor and Transmission Oil Temperature Sensor can be programmed to Disable (YES). If a sensor is disabled, then all event diagnostics associated with the sensor will be ignored.
Table 1: Parameter Table* See Oil Pressure Map** Engine Overspeed Shutdown disables injection when the engine speed exceeds 3220 rpm. The injection is enabled when the engine speed drops below 2800 rpm.Figure 1 - Low Oil Pressure Map Table 2: Event Codes Tools Required
Installation Tools
Basic electrical installation tools required are listed below. Additional sensors, lamps, connectors, etc, may be required.Table 3: Basic Electrical Installation Tools Service Tools
The Caterpillar Electronic Technician (ET) Service Tool is designed to help the service technician analyze and locate faults or problems. An ET Service Tool is required to perform certain sensor calibrations electronically and to read or program engine parameters.Caterpillar Electronic Technician (ET) requires a personal computer with the ET software installed and a Caterpillar Communication Adapter to translate from the data link to the computer RS-232 port.The ET communicates with the ECM to perform the following functions:* read/display diagnostic codes and event codes* read sensor signals such as engine speed, oil pressure, or coolant temperature* control the electronic calibration of the Throttle Position Sensors and Speed Timing Sensors through the ECM.Electronic Technician (ET) Electronic Service Tool
ET requires an IBM compatible computer (laptop) and software. The software allows the user to program ECM parameters, read and display sensor values and switch status, perform diagnostic tests and calibrate sensors. Table 4, "Required Tools for Electronic Technician (ET)," outlines the tools required to use ET.Table 4: Required Tools for Electronic Technician (ET) Service Manual
Connecting ET And The Communication Adapter Tool
The Communication Adapter Tool operates on the battery voltage supplied by the engine electrical system. Use the following procedure to connect ET and the Communication Adapter Tool to the engine.1. Turn the keyswitch to the OFF position.2. Connect the Service Tool Harness Cable between the J60 Service Tool Connector and the Communication Adapter Control connector.3. Connect the Communication Adapter Service Tool to the PC using the appropriate cable as shown.Turn the keyswitch to the ON position to begin testing. Do not start the engine unless instructed to start the engine by the "3126B Marine Engine Troubleshooting" manual. The ET and Communication Adapter Tool will operate with the engine running or with the engine off provided the keyswitch is in the ON position.Figure 2 - Communication Adapter II Connections 3126B HEUI Component Diagram
Figure 3 - Component Diagram Sensor and Wiring Harness Connector Locations
Figure 4 - Sensor Locations and Wiring Harness Connectors on the Engine Switch Requirements and Considerations
Switch Specifications
All OEM provided switches connected to the electronic control system must be a two wire design and externally connected to the Negative Battery Bus Bar. Internally grounded or case grounded switches must not be used.Voltages supplied to switches by the electronic control system will normally not exceed 24 VDC. Normal current through the switches will not exceed 5.0 milliamperes.Contact chatter and momentary opening or closing of the switches should not exceed 100 milliseconds in duration. The switches should not open or close due to vibration or shock normally found in the application.Contact plating should not corrode or oxidize. Gold plated switch contacts are recommended.When a switch contact is opened or the wiring harness has an open circuit, the internal pull up voltages of the ECM force the respective input to the positive battery. The closure of a switch that is installed by the OEM must short circuit the switch input to the Negative Battery Bus Bar connection of the ECM connector P1.All switches are supplied by the OEM. If a problem occurs that has an undetermined cause, install an Electronic Service Tool. Observe the display status screen of the Electronic Service Tool to determine the status of the switch.Voltage Thresholds Measured At The ECM
Voltage in Low
When any switch contacts are closed, the following voltage changes must be less than 0.9 VDC between the respective control input and the Negative Battery Bus Bar:* ground potential differences* switch voltage drops* wiring harness voltage dropsVoltage in High
When any switch contacts are open, the effective resistance between the pin-to-pin leakage paths in any of the following components must not result in an effective resistance of less than 5K Ohms between the respective control input and the ECM negative battery input:* connectors* harnesses* switchesOEM installed switches must be connected to the Negative Battery Bus Bar.Customer Installed Switches
Switch Connections
Table 5: Customer Connector Pin Connections for Switches Figure 5 - 3E-8766 and 3E-8768 Switches (R) ON (top or left)(S) NONE (center)(T) OFF (bottom or right)(1) Actuator orientation tabsFigure 6 - Schematic of 3E-8766 and 3E-8768 Switches When the switch contacts 2 and 3 are closed, the backlight connected to switch terminals A and B turns on.Figure 7 - 3E-8772 Switch (R) ON (top or left)(S) OFF (center)(T) ON (bottom or right)(1) Actuator orientation tabsFigure 8 - Schematic of 3E-8772