Volvo VN,VHD V2 and VT Trucks 2007 Sensor Instruction

This document instruct sensors on Volvo VN,VHD version2 and VT trucks 2007.

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Sensors on Volvo VN,VHD V2 and VT Trucks 2007:
Ambient Air Temperature Sensor
The Ambient Air Temperature Sensor is used to detect the outside air temperature. The sensor modifies a voltage signal from the ECM. The modified signal returns to the ECM as the ambient air temperature. The sensor uses a thermistor that is sensitive to the change in temperature.

The electrical resistance of the thermistor decreases as temperature increases.
The Ambient Air Temperature Sensor is located in the front of the vehicle.

Ambient (Atmospheric) Pressure Sensor
The Ambient (Atmospheric) Pressure Sensor contains a pressure sensitive diaphragm and an electrical amplifier.Mechanical pressure applied to the diaphragm causes the diaphragm to deflect and the amplifier to produce an electrical signal proportional to the deflection.
The Ambient (Atmospheric) Pressure Sensor is built into the Engine Management System (EMS) Module.2021 Volvo Impact 9116 EPC+Service Manual Download

Camshaft Position Sensor
The Camshaft Position (Engine Position) Sensor is located in the rear face of the timing gear cover at the rear of the engine, near the bottom of the valve cover. It uses magnetic induction to generate a pulsed electrical signal. It senses the passage of seven (7) timing bumps on the edge of the camshaft dampener. Six of the holes correspond to the phasing of the electronic unit injectors, while the seventh hole indicates the top dead center position.

Cooling Fan Speed (CFS) Sensor
On engines with an electronically controlled viscous fan drive, the electronic fan drive contains a Hall effect speed sensor. When the engine is running, a series of vanes in the fan drive housing rotates past a magnet in the fan drive solenoid generating a pulsed voltage signal. The Engine Management System (EMS) Module monitors the status if the air conditioning system and signals from the Engine Coolant Temperature (ECT) Sensor, the Engine Oil Temperature (EOT) Sensor, and the Engine Speed/Timing (RPM/TDC) Sensor and calculates the optimal cooling fan speed.
The Cooling Fan Speed Sensor is located in the fan drive on the front of the engine.

Crankshaft Position (Engine Speed) Sensor The Crankshaft Position (Engine Speed) Sensor uses magnetic induction to generate a pulsed electrical signal. Notches are machined into the edge of the flywheel. When one of the notches passes close to the sensor, D Design and Function electric pulses result.
The Crankshaft Position (Engine Speed) Sensor also indicates when the crankshaft is at the top dead center position.

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Differential Pressure DP Sensor
The differential pressure sensor is used for flow measurement of the Diesel Particulate Filter (DPF). This sensor has two pressure ports and senses the difference in pressure between the two ports. Measurement of the pressure before and after the DPF is used to calculate diesel filter regeneration.
The Differential Pressure DPF Sensor is located on the side of the Diesel Particulate Filter (DPF).

EGR Differential Pressure Sensor
The EGR differential pressure sensor is used for flow measurement of the Exhaust Gas Recirculation (EGR) valve. This sensor has two pressure ports and senses the difference in pressure between the two ports.
Measurement of the pressure before and after the EGR valve is used to calculate EGR flow.
The EGR Differential Pressure Sensor is located on the left or right side of the engine.

EGR Temperature Sensor
The EGR temperature sensor detects exhaust gas temperature for EGR system. The sensor modifies a voltage signal from the control unit. The modified signal returns to the control unit as the exhaust temperature of the EGR system to confirm EGR operation. The sensor uses a thermistor that is sensitive to the change in temperature.
The EGR Temperature Sensor is located near the EGR valve.

Engine Coolant Level (ECL) Sensor
The Engine Coolant Level (ECL) Sensor is a switch. If engine coolant level falls below a calibrated point the contacts open and the driver will be notified of the low coolant level.
The Engine Coolant Level (ECL) Sensor is located in the cooling system reservoir tank.

Engine Coolant Temperature (ECT) Sensor The Engine Coolant Temperature Sensor is located at the front of the engine. The sensor will indicate a high coolant temperature caused by problems like radiator blockage, thermostat failure, heavy load, or high ambientD Design and Function temperatures. This sensor is also used for cold start
enhancement and for fan clutch engagement.

Engine Oil Pressure (EOP) Sensor
The Engine Oil Pressure Sensor contains a pressure sensitive diaphragm and a electrical amplifier. Mechanical pressure applied to the diaphragm causes the diaphragm to deflect and the amplifier to produce an electrical signal proportional to the deflection.
The Engine Oil Pressure Sensor is located on the oil filter assembly. The sensor monitors engine oil pressure to warn of lubrication system failure.

Engine Oil Level (EOL) Sensor
The Engine Oil Level Sensor is located in the oil pan.

Engine Oil Temperature (EOT) Sensor
The Engine Oil Temperature Sensor is a thermistor whose resistance varies inversely to temperature. The sensor has a negative temperature coefficient, which means the sensor resistance will decrease as the engine oil temperature increases.
The Engine Oil Temperature Sensor is located in the oil pan.
Exhaust Temperature Sensor (DPF Sensors)
The exhaust gas temperature sensor detects exhaust gas temperature for DPF protection as well as DPF regeneration control. The sensor modifies a voltage signal from the control unit. The modified signal returns to the control unit as the exhaust temperature at that specific location of the exhaust. The sensor uses a thermistor that is sensitive to the change in temperature.
The Exhaust Temperature Sensors are located in the DPF assembly.

Fuel Pressure Sensor
The fuel pressure sensor contains a diaphragm that senses fuel pressure. A pressure change causes the diaphragm to flex, inducing a stress or strain in the diaphragm. The resistor values in the sensor change in proportion to the stress applied to the diaphragm and produces an electrical output.
The Fuel Pressure Sensor is located on top of the fuel filter housing.

Intake Air Temperature and Humidity (IATH) Sensor 

The Intake Air Temperature and Humidity (IATH) Sensor contains a thermistor and a capacitive sensor. D Design and Function
The resistance of the thermistor varies inversely to temperature. The output of the capacitive sensor increases as the humidity of the surrounding air increases.
By monitoring the signals from both portions of the sensor, the Engine Management System (EMS) Module calculates the temperature and humidity of the air passing
through the air filter housing. The Intake Air Temperature and Humidity (IATH) Sensor is located in the air intake tube just downstream from the air filter canister.

Intake Manifold (Boost) Temperature Sensor
The Intake Manifold (Boost) Temperature Sensor is a thermistor whose resistance varies inversely to temperature. The sensor has a negative temperature coefficient, which means the sensor resistance will decrease as the inlet air temperature increases.
The Intake Manifold (Boost) Temperature Sensor is located in the intake manifold.

Intake Manifold Pressure Sensor
The Intake Manifold Pressure Sensor contains a pressure sensitive diaphragm and an electrical amplifier.
Mechanical pressure applied to the diaphragm causes the diaphragm to deflect and the amplifier to produce an electrical signal proportional to the deflection.
The Intake Manifold Pressure Sensor is located on the air inlet pipe before the intake manifold.

Throttle Position (TP) Sensor
The Throttle Position Sensor is a potentiometer that is mechanically linked to the accelerator pedal. A potentiometer is a variable resistor whose resistance will change as the pedal is pressed. As the resistance changes, the signal voltage of the sensor changes indicating the accelerator pedal position.
The Throttle Position Sensor is located above the accelerator pedal. The sensor is designed to improve the driver’s control by reducing sensitivity to chassis motion.
This sensor provides the driver’s fuel request input to the VECU.

Turbo Speed Sensor
The Turbo Speed Sensor informs the EMS of the turbo shaft speed. The sensor does not read from the vanes,but reads from the shaft. The Engine Management System (EMS) Module uses this signal in conjunction with the VGT position sensor signal to control the speed of the turbocharger and therefore optimize the intake manifold
pressure.

The Turbo Speed Sensor is mounted in the center of the turbocharger.

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Created on May 6th 2022 20:45. Viewed 192 times.

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