SWITCH AS-TOGGLE 3T1730 - Caterpillar

G3500B Engines
Illustration 1 g01671113
Block diagram of G3516 components. Quantity of components will change depending on cylinder count.
Fuel Metering Valve
Illustration 2 g01716014
Location of the fuel metering valve (right side top engine view)
(1) Fuel metering valve Fuel metering valve (1) is electronically controlled and electrically actuated. The fuel metering valve and the Electronic Control Module (ECM) communicate via the CAN data link.Actuators
Illustration 3 g01716034
Location of the actuators that are for the engine (left side top engine view)
(2) Throttle actuator
(3) Compressor bypass actuator Throttle actuator (2) and the compressor bypass actuator (3) are electronically controlled and electrically actuated. The ECM issues commands to the actuators via the CAN data link.Sensors
Sensors provide information to the electronic control modules. The information enables the modules to control the engine as efficiently as possible over a wide range of operating conditions. The information is used for monitoring engine operation.The sensors provide signals to the ECM that are used in the determination of the states of engine alarms and of engine shutdowns. These conditions may be in response to abnormal operation or to a command that is initiated by the operator. Illustrations 4, 5, and 6 show the locations of the sensors. Refer to Systems Operation/Testing and Adjusting, "Engine Sensors" for the descriptions of all of these sensors.
Illustration 4 g01717613
Locations of the engine components (left side engine view)
(4) Intake manifold air temperature sensor
(5) Intake manifold pressure sensor
(6) Engine coolant temperature sensor
(7) Pressure sensor for unfiltered oil
(8) Pressure sensor for filtered oil
(9) Engine oil temperature sensor
(10) Engine coolant pressure sensor (outlet)
(11) Throttle valve differential pressure sensor
(12) ECM junction box
(13) Pressure switch for the prelubrication
(14) Exhaust temperature scanner
(15) Engine junction box
(16) Emergency stop button
(17) Detonation sensors (left side)
(18) Solenoid for the Gas Shutoff Valve (GSOV)
(19) Engine speed/timing sensor
Illustration 5 g01719334
Locations of the engine components (right side engine view)
(20) Coolant pressure switch (inlet)
(21) Air start solenoid
(22) Solenoid for the prelube motor
(23) Detonation sensors (right side)
Illustration 6 g01717317
Locations of the engine components (rear engine view)
(24) NOX sensor buffer
(25) NOX sensor Remote Panel
Illustration 7 g01717195
Components for the remote panel
(26) Advisor monitor display
(27) Indicator for prelube
(28) Emergency stop button
(29) Engine control switch
(30) Desired speed potentiometer
(31) Service tool connector Exhaust Temperature Scanner and Exhaust Temperature Sensors
Illustration 8 g01716873
Locations of the exhaust temperature scanner and the exhaust temperature sensors for each cylinder (typical locations)
(32) Exhaust temperature sensors
(33) Exhaust temperature scanner
Illustration 9 g01716926
Locations of the exhaust temperature sensors for the turbochargers
(34) Turbocharger inlet temperature sensor
(35) Turbocharger outlet temperature sensor Type K thermocouples are used as exhaust gas temperature sensors for the engine. These exhaust gas temperature sensors provide information to the exhaust temperature scanner. The exhaust temperature scanner uses this information to monitor engine operation.The exhaust temperature scanner monitors all of the signals from the exhaust temperature sensors. If a problem is detected, the exhaust temperature scanner can enable alarms and shutoffs. The exhaust temperature scanner broadcasts the temperature readings of the exhaust gas temperature sensors over the CAN data link for use by other modules. Refer to Systems Operation/Testing and Adjusting, KENR5473, "Exhaust Temperature Module" for additional information that is related to the temperature scanner.