A/C High Pressure Switch - The A/C high pressure switch senses refrigerant pressure in the air conditioning system. The A/C high pressure switch opens the electrical contacts and the A/C high pressure switch closes the electrical contacts. The opening and closing of the electrical contacts depends on the pressure in the system. The electrical contacts control the cooling fan. This switch may be connected to the ECM in some applications.
Accelerator Pedal Position - The accelerator pedal position is the interpretation by the ECM of the signal from the accelerator pedal position sensor.
Accelerator Pedal Position Sensor - The accelerator pedal position sensor is an electronic sensor that is connected to the accelerator pedal. The accelerator pedal position sensor sends a Pulse Width Modulated signal to the ECM.
Active Diagnostic Code - An active diagnostic code describes a condition that is currently present in order to alert the driver or the service technician of an abnormal parameter of engine operation. Refer to a Diagnostic Fault Code.
Aftermarket Device - An aftermarket device is a device or an accessory that is installed by the customer after the vehicle is delivered.
Air-To-Air Aftercooler - An air-to-air aftercooler is a device that is used on turbocharged engines in order to cool inlet air that has undergone compression. The inlet air is cooled after the inlet air passes through the turbocharger. The inlet air is passed through an aftercooler (heat exchanger) that uses ambient air for cooling. The inlet air that has been cooled advances to the inlet manifold.
Alternating Current (AC) - Alternating current is an electric current that reverses direction at a regular interval that is reoccurring.
American Wire Gauge (AWG) - AWG is a measure of the diameter of electrical wire. AWG is also a measure of the current carrying capacity of electrical wire. When the AWG number is smaller, the diameter of the wire is larger. When the AWG number is larger, the diameter of the wire is smaller.
Analog Sensors - Analog sensors produce a DC output signal. The sensors detect changes in temperature or pressure. The change is converted by the sensor to an electrical signal.
Analog Sensor Return - The common line (ground) for the analog sensor from the ECM is used as a ground for the analog sensors.
Analog Sensor Supply - The ECM supplies power to the analog sensors and the power supply is +5 VDC.
Anti-Lock Brake System (ABS) - An anti-lock brake system is a brake system that attempts to reduce a skid during brake operation. A power train electronic control can turn off the engine retarder, if necessary. Also, a power train electronic control can signal the engine ECM to deactivate the engine retarder.
ATA Data Link (American Trucking Association) - The ATA data link is a two wire electrical connection for communication with other microprocessor based devices. These devices are compatible with Standards for the American Trucking Association and Standards for the SAE (J1587 and J1708) such as trip recorders, electronic dashboards, power train controls, and maintenance systems. The data link is also the serial communication medium that is used for programming and troubleshooting Caterpillar truck engines.
Atmospheric Pressure Sensor - The atmospheric pressure sensor measures barometric pressure. The sensor sends a signal to the Engine Control Module (ECM). The signal is used in engine control and in engine operation.
Auxiliary Pressure Sensor - This sensor is an additional pressure sensor that is installed by the engine owner.
Auxiliary Retarder Relay - The brakes' solenoids are driven by an OEM installed relay, which is driven by the ECM.
Auxiliary Temperature Sensor - This sensor is an additional temperature sensor that is installed by the engine owner.
Before Top Center (BTC) - BTC is the 180 degrees of crankshaft rotation before the piston reaches the top center position in the normal direction of rotation.
Boost - The difference between the turbocharger outlet pressure and the atmospheric pressure is commonly referred to as boost.
Boost Pressure Sensor - The boost pressure sensor measures inlet manifold air pressure. The boost pressure sensor sends a signal to the ECM.
Bypass Circuit - A bypass circuit is a circuit that is used as a substitute circuit for an existing circuit. A bypass circuit is typically used as a test circuit.
Calibration - Calibration is an electronic adjustment of a sensor signal.
Caterpillar Driver Information Display (CAT ID) - The Caterpillar Driver Information Display is a digital readout of the performance parameters of the vehicle and performance parameters that are monitored by the ECM.
Caterpillar Electronic Technician (Cat ET) - Cat ET is an electronic service tool that uses a software program to run on a personal computer (PC). Cat ET is used to service Caterpillar products. This program has replaced the ECAP tool.
Caterpillar Engine Monitoring - Caterpillar Engine Monitoring is the part of the Caterpillar electronic engine control that monitors coolant temperature, oil pressure, inlet manifold air temperature and coolant level. The monitoring alerts the operator of detected problems. Coolant temperature, intake manifold air temperature, and oil pressure sensors are supplied by Caterpillar and monitored by the ECM. The coolant level sensor is installed by the vehicle OEM but still monitored by the ECM. Aftermarket engine monitoring systems do not interface with the Caterpillar electronic engine control.
Caterpillar Monitoring System - The Caterpillar Monitoring System is a modular electronic display. The Caterpillar Monitoring System can communicate with the ECM via the CAT Data Link.
Check Engine Lamp - The check engine lamp is sometimes referred to as the diagnostic lamp. The check engine lamp is used to alert the operator of the presence of an active event. The lamp then flashes a diagnostic code.
Clutch Pedal Position Switch - The switch is typically supplied and installed by the OEM. This switch is typically a limit switch that is mounted near the clutch pedal. The switch is usually adjustable. This switch is in the normally closed position when the clutch pedal is released. Depressing the clutch pedal will open the circuit.
Code - Refer to the Diagnostic Fault Code and the Diagnostic Event Code.
Cold Mode - Cold mode is a mode for cold starting and for cold engine operation that includes timing that is retarded and low idle that is raised. This mode is used for engine protection, reduced smoke emissions and faster warm up time.
Component Identifier (CID) - The CID is a number that identifies the specific component of the electronic control system that has experienced a diagnostic code. This is part of the CDL.
Communication Adapter Tool - The communication adapter provides a communication link between the ECM and Cat ET.
Control Area Network (CAN) Data Link - The CAN Data Link is a serial communications port that is used for communication with other microprocessor based devices. This is also referred to as the J1939 Data Link.
Coolant Level Sensor - This OEM installed sensor detects the absence or presence of coolant at the probe. The sensor then sends a signal to the ECM.
Coolant Temperature Sensor - This sensor detects the engine coolant temperature for Cold Mode operation and the Caterpillar Engine Monitoring. The Caterpillar Engine Monitoring must be enabled for the coolant temperature sensor to be used for monitoring purposes.
Cooling Fan Override Switch - This switch overrides control of the cooling fan relay so the cooling fan operates continuously. This switch is supplied and installed by the OEM.
Cooling Fan Relay - This relay is controlled by the ECM which uses information from the coolant temperature sensor, the engine retarder and the air conditioning high pressure switch. The air conditioning high pressure switch is not always installed. The relay and the air conditioning high pressure switch is supplied and installed by the OEM.
Crankshaft Position Sensor - The crankshaft position sensor measures the crankshaft position, the direction of rotation, and the engine rpm. The sensor sends the signals to the ECM.
Cruise Control Range - The cruise control range is the speed range that is monitored by the cruise control. This speed range is typically the anticipated speed range on the open road. The cruise control range can be programmed with the low cruise limit and the high cruise limit.
Custom Data - Custom data is part of the fleet trip data that is stored in the ECM. This capability allows the vehicle owner to specify operating parameters for monitoring purposes while the engine is in service.
Customer Specified Parameter - A Customer Specified Parameter is a value that can be set and changed by the customer. The parameters can be protected by Customer Passwords.
Desired Engine Speed - The desired engine speed is input to the electronic governor within the ECM. The electronic governor uses the signal from the accelerator pedal position sensor, the engine speed sensor, the cruise control, and the Customer Parameters in order to determine desired speed.
Desired RPM - The desired rpm is input to the electronic governor within the ECM. The electronic governor uses the signal from the accelerator pedal position sensor, the engine speed sensor, the cruise control, and the Customer Parameters in order to determine desired rpm.
Diagnostic Event Code - These codes indicate an event that describes an abnormal engine condition such as a high coolant temperature. These codes are not necessarily an indication of problems within the electronic system.
Diagnostic Fault Code - A diagnostic fault code is sometimes referred to as a fault code. These codes indicate an electronic system malfunction or abnormal operating conditions.
Diagnostic Flash Code - The diagnostic flash codes are flashed on the check engine lamp. These flash codes indicate a malfunction in the electronic system or an event that is detected by the ECM.
Diagnostic Lamp - A diagnostic lamp is sometimes called the check engine lamp. The diagnostic lamp is used to warn the operator of the presence of an active diagnostic code.
Digital Sensors - Digital sensors produce an ON or OFF type of signal. Some sensors vary the ON or OFF time which is referred to as Pulse Width Modulation (PWM).
Digital Sensor Return - The common line (ground) from the ECM is used as a ground for the digital sensors.
Digital Sensor Supply - The supply from the ECM is used in order to power the digital sensors.
Direct Current (DC) - Direct current is the type of current that flows consistently in only one direction.
DT, DT Connector, or Deutsch DT - This is a type of connector that is used on Caterpillar truck engines. The connectors are manufactured by Deutsch.
Dual Coil Vehicle Speed Sensor - The dual coil vehicle speed sensor is a magnetic pickup that senses movement of the teeth on the output shaft of the transmission. The sensor contains two coils. This sensor provides two differential output signals.
Duty Cycle - Refer to Pulse Width Modulation.
Electronic Engine Control - The electronic engine control is a complete electronic system. The electronic engine control monitors the engine operation under all conditions. The electronic engine control also controls the engine operation under all conditions.
Electronic Service Tool - Refer to "Caterpillar Electronic Technician" (Cat ET).
Electronically Controlled Unit Injector - The electronically controlled unit injector is an injection pump which is a mechanically actuated, electronically controlled unit injector. This unit combines the pumping, electronic fuel metering and injecting elements in a single unit.
EMS Display Modules - Refer to the Caterpillar Monitoring System.
Engine Control Module (ECM) - The ECM is the engine's control computer. The ECM provides power to the electronics. The ECM monitors data that is input from the engine's sensors. The ECM acts as a governor in order to control engine rpm.
Engine Monitoring System - The Engine Monitoring System is a programmable system that allows the ECM to take actions if an engine parameter is out of the range. The actions are Warning, Derate and Shutdown.
Engine Oil Pressure Sensor - This sensor measures engine oil pressure and the sensor sends a signal to the ECM.
Engine Retarder Solenoids - The engine retarder solenoids are installed by Caterpillar and the solenoids are driven by the ECM. These solenoids are used in place of relays such as the auxiliary brake that is installed by the OEM.
Engine Speed/Timing Sensor - This sensor provides a variable amplitude and Pulse Width Modulated signal to the ECM. The ECM interprets this signal as the crankshaft position and the engine speed.
Erasable Programmable Read Only Memory (EPROM) - An EPROM is a type of computer memory chip.
Estimated Dynamic Timing - The estimated dynamic timing is the estimate that is provided by the ECM of the actual injection timing.
ET - Refer to "Caterpillar Electronic Technician" (Cat ET).
Ether Relay - The ether relay is used in order to actuate the ether injection system. The relay is controlled by the ECM.
Event - Events indicate an event that describes an abnormal engine condition. These codes are not necessarily an indication of problems within the electronic system.
Exhaust Brake Relay - The brake solenoids are driven by an OEM installed relay, which is driven by the ECM.
Failure Mode Identifier (FMI) - This Identifier indicates the type of failure that has been experienced by the component. The FMI has been adopted from the SAE practice of J1587 diagnostics.
Flash Code (FC) - The flash codes are proprietary Caterpillar code numbers that are flashed on the diagnostic lamp. The flash codes are flashed on the check engine lamp. These flash codes indicate a malfunction in the electronic system or an event that is detected by the ECM.
Flash Programming - Flash programming is the method of programming or updating an ECM with Cat ET over the data link instead of replacing components. Flash programming installs the specific Personality Module that is used to control the engine. The Personality Module contains specific performance maps and features for a selected rating.
Fleet Information Software (FIS) - FIS is a software program that operates on a personal computer (PC). This program allows the user to review the trip information. The program also allows the user to reset the trip information which includes the Maintenance Indicator information.
Fuel Position - This is an internal signal within the ECM. The signal comes from the electronic governor and the signal then goes to the fuel injection control. The information that is gathered is based on the Desired RPM, the FRC Limit, the Rated Fuel Limit, and the actual engine rpm.
Fuel Ratio Control (FRC) - The FRC is a limit that is based on the control of the fuel to the air ratio. The FRC is used for purposes of emission control. When the ECM senses a higher boost pressure (more air into the cylinder), the FRC increases the FRC Limit (more fuel into the cylinder).
Fuel Temperature Sensor - This sensor detects the fuel temperature. The ECM monitors the fuel temperature and the ECM adjusts the calculated fuel rate accordingly.
Full Load Setting (FLS) - The FLS is the number that represents the fuel system adjustment. This adjustment is made at the factory in order to help ensure the maximum fuel delivery of the fuel system. The correct value for this parameter is stamped on the engine information ratings plate. This parameter must be programmed. If the parameters are not programmed, the diagnostic code that is 253-02 Check Customer or System Parameters will be active.
Full Torque Setting (FTS) - The FTS is similar to the Full Load Setting. This parameter must be programmed. If the parameters are not programmed the diagnostic code that is 253-02 Check Customer or System Parameters will be active.
Gear Down Protection - This feature consists of the High Gear Limits that are programmable. High Gear Limits are used in order to promote driving in higher gears for increased fuel economy.
Harness - The harness is the bundle of wiring (loom) that connects all components of the electronic system.
Hertz (Hz) - Hertz is the measure of electrical frequency in cycles per second.
High Pressure Oil Manifold - The high pressure oil manifold is an oil gallery that is added to the cylinder head in order to supply the unit injectors with high pressure oil.
High Pressure Oil Pump - The high pressure oil pump is an axial piston pump that is driven by gears. The high pressure oil pump is used to raise the engine oil pressure in order to activate the unit injectors. The amount of oil pressure that is required to activate the unit injectors is called the actuation pressure.
Histogram - The histogram is a bar graph which may indicate the relative frequency of vehicle operation in specific operating ranges. A histogram can be used to show many relationships.
Hydraulically Actuated Electronically Controlled Unit Injector (HEUI) - The HEUI is an injection pump which is a hydraulically actuated, electronically controlled unit injector. This injector uses hydraulic forces to produce the high injection pressure. This unit combines the pumping, electronic fuel metering, and injecting elements in a single unit.
Idle rpm Limit - This is a programmable parameter which indicates the maximum allowable engine rpm that is allowed when the engine rpm is set with the cruise set/resume switch.
Idle Shutdown Time - This programmable parameter indicates a designated idle time in minutes that is allowed before shutdown.
Idle/PTO Bump rpm - This programmable parameter indicates the amount of change to the engine rpm that will occur when the switch for acceleration is toggled or the switch for deceleration is toggled.
Injection Actuation Pressure Control Valve - This is a dump valve that is controlled by an electrical signal that maintains high pressure for the high pressure oil manifold. The ECM controls the pressure in the high pressure oil manifold by inputs from the other sensors. The control valve regulates the high pressure oil to the hydraulic electronic unit injector through the high pressure oil manifold. Proper fuel injection pressure is necessary for desired engine operation.
Injection Actuation Pressure Sensor - An electrical sensor on the high pressure oil manifold converts oil pressure into an electrical signal for the ECM.
Injector Codes - The injector codes or injector trim codes are numeric codes or alphanumeric codes that are etched or stamped on individual injectors. These codes are used to fine tune the fuel delivery.
Inlet Air Temperature Sensor - This sensor detects the air inlet temperature. The ECM monitors the inlet air temperature and other data in order to adjust injection timing and other performance functions.
Integrated Electronic Controls - The engine is designed with the electronic controls as a necessary part of the system. The engine will not operate without the electronic controls.
J1922 Data Link - This data link is an SAE diagnostic communications data link that is used to communicate between the electronic engine and the power train components. Examples of power train components are the ABS/traction control system and the transmissions. This allows the power train component to control the engine during reduced traction or transmission shifts.
J1939 Data Link - This data link is an SAE diagnostic communications data link that is used to communicate between the electronic engine, the transmission, instrument clusters, and/or the power train controls.
Keyswitch Input - When the input is energized, the ECM is powered up.
Kickout Switch - This term refers to the service brake switch and the clutch switch. These switches are used as an exit or a kickout for the cruise control set speed, the idle speed setting, or the PTO/Idle set speed.
Latch Mode - This is a programmable parameter for control of the exhaust brake. The exhaust brake engages when the service brake pedal is depressed. The exhaust brake remains engaged until the control detects a change in a control input.
Logged Diagnostic Codes - Logged diagnostic codes are codes which are stored in memory. These codes are meant to be an indicator of possible causes for intermittent problems. Refer to the Diagnostic Fault Code for more information.
Low Range Torque Protection (LRTP) - This feature allows the transmission to limit the engine torque in the lower gears. The engine and the transmission must maintain constant communication in order to allow the LRTP strategy to function. If the engine and the transmission fail to communicate the engine will operate under a torque limit that is set by the transmission. This does not represent a problem with the engine.
Maintenance Clear Switch - The maintenance clear switch is required to reset the "PM1 Interval" diagnostic after maintenance on the engine is performed. This reset is necessary for the maintenance indicator to function.
Maintenance Overdue Lamp - This lamp will turn on when the Preventive Maintenance Interval occurs such as "PM1 Interval".
Mechanically Actuated Electronically Controlled Unit Injector (MEUI) - The MEUI is an injection pump which is a mechanically actuated, electronically controlled unit injector. Mechanical forces that are produced from the camshaft are used to produce the high injection pressures. This unit combines the pumping, electronic fuel metering, and injecting elements in a single unit.
Oil Pressure Sensor - This sensor measures engine oil pressure and the sensor signals the ECM.
Open Circuit - An open circuit is a condition that is caused by an open switch, or an electrical wire or a connection is broken. When this condition exists, the signal or the supply voltage can no longer reach the intended destination.
Original Equipment Manufacturer (OEM) - The OEM is the manufacturer of a vehicle that uses a Caterpillar engine for the power source.
Overspeed Verify - This feature is used to test the Overspeed Shutoff Circuit. The shutoff circuit is tripped at 75% of the Overspeed Shutoff Limit.
Parameter - A parameter is a value or a limit that is programmable. This helps determine specific characteristics or behaviors of the engine and/or vehicle.
Parameter Identifier (PID) - The PID is a two digit code or a three digit code which is assigned to each component in order to identify data via the data link to the ECM.
Passive Magnetic Speed Sensor - This sensor is a speed sensor that does not require a power and a ground connection. The sensor produces a signal that is based on the change in magnetic flux of a ferrous metal gear near the sensing tip.
Password - A password is a group of numeric characters or a group of alphanumeric characters that is designed to restrict access to parameters. The electronic system requires correct passwords in order to change Customer Specified Parameters (Customer Passwords) or certain engine specifications (Factory Passwords). Passwords are also required to clear certain diagnostic codes.
Personality Module or Ratings Personality Module - This module is attached to the inside of the ECM. The module contains all the instructions (software) for the ECM and the module contains the performance maps for a specific horsepower family.
Power Cycled - Power cycled happens when power to the ECM is cycled: on, off and on. Power cycled refers to the action of cycling the keyswitch from any position to the OFF position, and to the START/RUN position.
Power Take-Off (PTO) - The PTO operates with the cruise control switches and the dedicated PTO On/Off switch. This mode permits the setting of constant engine speeds or the mode permits varying the speed with either the accelerator pedal in the cab or a remote accelerator.
Power Train Data Link - Refer to J1922 Data Link.
Powered Down - Powered down occurs when power is removed from the ECM. Powered down refers to the action of cycling the keyswitch from any position to the OFF/RESET position.
Powered Up - Powered up occurs when power is applied to the ECM. Powered up refers to the action of cycling the keyswitch from the OFF/RESET position to the START position.
Pro-Link - Pro-Link is an electronic service tool that is hand-held. The tool is manufactured by Micro Processor Systems, Inc. (MPSI). This tool is supplied with a Caterpillar cartridge in order to service a Caterpillar engine that is electronically controlled.
Progressive Shifting - This is a method of quickly upshifting through the lower gears without excessive engine rpm in each gear. Shifts are made above peak torque but below rated rpm. If the engine is driven to an excessively high engine rpm before shifting to the next gear, fuel is wasted. When the excessively high engine rpm ranges are used, the torque rise of the engine is not fully utilized. The two steps LoGr 1 and LoGr 2give the opportunity for progressive shifting. LoGr 1 is typically setat no lower than peak torque plus 200 rpm. LoGr 2 is typically set at a point that is midway between the LoGr 1 rpm limit and the Top Engine Limit.
PTO Configuration - This is a programmable parameter that determines the best use of the ECM input and the ECM output for PTO applications.
Pulse Width Modulation (PWM) - The PWM is a signal that consists of pulses that are of variable width. These pulses occur at fixed intervals. The ratio of TIME ON versus total TIME OFF can be varied. This ratio is also referred to as a duty cycle.
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Rated Fuel Limit - This term indicates the maximum allowable fuel position (longest injection pulse). This position will produce rated power for this engine configuration.
Reference Voltage - The Reference Voltage is a regulated voltage that is supplied by the ECM to a sensor. The reference voltage is used by the sensor to generate a signal voltage.
Remote Shutdown - The ECM disables the fuel injection signal when the Remote Shutdown Switch is closed. This causes the ECM to shut down the engine. However, the ECM remains active. The air shutoff solenoid is not activated when the remote shutdown switch is activated.
Remote Station Operation - This is a location that is outside of the vehicle cab. The functions such as the engine speed control are typically used for some type of PTO operation that is for pumping or for some other application that uses the engine power. These functions are controlled from the remote station.
Retarder Enable Signal - The retarder enable signal interfaces the ECM to the engine retarder. This will restrict operation of the engine brake during undesirable engine operating conditions. One operating condition is at a time when the engine is being fueled.
Retarder Solenoids - This refers to the engine retarder that is installed by Caterpillar. The solenoids are driven directly by the Caterpillar ECM. The solenoids are not driven through an OEM installed relay such as the auxiliary retarder.
Sensor - The sensor is a device that is used to detect a change in pressure, temperature, or mechanical movement. The information that is detected is converted into an electrical signal.
Service Brake Pedal Position Switch - This switch is typically a pressure switch that is supplied and installed by the OEM. This switch is normally closed when the brake pedal is in the released position. Depressing the brake will open the circuit.
Service Program Module (SPM) - The service program module is a software program that is used to adapt the electronic service tool to a specific engine application.
Short Circuit - A short circuit is a condition that has an electrical circuit that is inadvertently connected to an undesirable point. An example of a short circuit is a wire which rubs against a vehicle frame and this rubbing eventually wears off the wire insulation. Electrical contact with the frame is made and a short circuit results.
Signal - The signal is a voltage or a waveform that is used in order to transmit information typically from a sensor to the ECM.
Speed Burp - A Speed Burp is a sudden, brief, unwanted change in the engine rpm.
Standard SAE Diagnostic Communications Data Link - Refer to the ATA Data Link.
Starting Aid Switch - This switch is used for injection of a starting aid in cold weather. An example of a starting aid is ether.
Static Timing - Static timing is the basis for correct fuel timing and valve mechanism operation. Static timing is determined by the timing ring and the alignment of the rear gear group.
Subsystem - A Subsystem that is used in this application is a part of the electronic system that relates to a particular function. An example of a subsystem is the throttle subsystem.
Supply Voltage - The supply voltage is a constant voltage that is supplied to a component in order to provide electrical power that is required for the component to operate. The power may be generated by the ECM or the power may be battery voltage that is supplied by the vehicle wiring.
Suspect Parameter Number (SPN) - The SPN is a three digit code which is assigned to each component in order to identify data via the data link to the ECM. This is used for J1939 diagnostics.
System Configuration Parameters - System Configuration Parameters are Parameters that affect the power rating family or emissions.
T-Harness - The T-Harness is a test harness that is designed to connect into the vehicle harness or the engine harness. This connection allows a normal circuit operation and the connection simultaneously provides a breakout T in order to measure the signals.
Terminating Resistor - This is used to terminate the J1939 CAN data link. Refer to the installation procedures.
Theft Deterrent - This feature uses a four digit code in order to prevent the engine from starting. The feature requires a password to be entered via the CAT ID.
Timing Calibration - The timing calibration is the adjustment of an electrical signal. This adjustment is made in order to correct the timing error between the crankshaft and the crankshaft position sensor or between the crankshaft and the engine speed/timing sensor.
Top Center - This refers to the crankshaft position when the engine piston position is at the highest point of travel. The engine must be turned in the normal direction of rotation in order to reach this point.
Torque Limit - This is a programmable parameter that limits the maximum torque which is based on the PTO configuration and PTO operation.
Total Tattletale - The Total Tattletale is the total number of changes to all the Customer Specified Parameters that are stored in the ECM.
Transducer (Timing Calibration Probe) - This is a device that converts a mechanical signal to an electrical signal. This probe requires a power source in order to operate.
Transmission Style - The "Transmission Style" is a programmable parameter that designates the type of transmission in the vehicle and the various circuits that are connected to the ECM. The relay for the transmission, cruise control, PTO/idle set speed, and the operation of the exhaust brake are affected by this parameter setting.
Trip Recorder - The trip recorder is an aftermarket device that is dedicated to recording the parameters of the vehicle and the parameters of the operating engine during the vehicle service. The trip recorder is used to analyze the driving habits and the recorder is used in order to produce the logs of the driver.
Vehicle Speed Sensor - The vehicle speed sensor is an electromagnetic pickup that measures vehicle speed from the rotation of gear teeth in the drive train of the vehicle.
Wastegate Solenoid - The wastegate solenoid allows the ECM to precisely regulate boost pressure. The wastegate solenoid prevents air from reaching the wastegate and allowing boost pressure to increase. By closing or partially closing, the wastegate solenoid can increase boost pressure. Typical wastegates will limit boost pressure to a preset limit.