Land Rover Lesson 2 Auto Trans Coolingine Rover Manual
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four pulses for every two engine revolutions. The sensing element is positioned between 0 and 2mm from the side of the cam gear wheel. The variable cam inlet is parked in the retarded position and can advance up to 48 degrees. The camshaft timing wheel is a sintered component which has four teeth on it to enable the EMS to detect cylinder identification. The signal is used for: •Variable inlet cam timing •Cylinder recognition •Enabling sequential fuel injection •Knock control •Cylinder identification for...
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FUEL RAIL TEMPERATURE SENSOR The fuel rail temperature sensor measures the temperature of the fuel in the fuel rail. This input is then used to deliver the correct quantity of fuel to the engine. Operating Range -40 Degrees Celsius to 150 Degrees Celsius. The fuel rail temperature sensor is fitted on the rear of the right hand bank (bank A) fuel rail. MASS AIR FLOW/INLET AIR TEMPERATURE SENSOR (MAF/IAT) The air flow meter is located in the clean air duct immediately after the air filter box. The air mass...
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MANIFOLD ABSOLUTE PRESSURE SENSOR (MAP) The MAP sensor provides a voltage proportional to the absolute pressure in the intake manifold. This signal allows the load on the engine to be calculated and used within the internal calculations of the ECM. The sensor is located on the rear of the air intake manifold. DescriptionPin No MAP signal1 Sensor supply2 Not used3 Sensor ground4 The output signal from the MAP sensor, together with the CKP and IAT sensors, is used by the ECM to calculate the amount of air...
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Care must be taken at all times to avoid damaging the knock sensors, but particularly during removal and fitting procedures. The recommendations regarding torque and surface preparation must be adhered to. The torque applied to the sensor and the quality of the surface preparation both have an influence over the transfer of mechanical noise from the cylinder block to the crystal. The ECM uses the signals supplied by the knock sensors, in conjunction with the signal it receives from the camshaft sensor,...
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A software strategy within the ECM enables the throttle position to be calibrated each ignition cycle. When the ignition is turned ON, the ECM performs a self test and calibration routine on the electronic throttle by opening and closing the throttle fully. Electronic Throttle Pin Out Table DescriptionPin No Motor -1 Motor +2 Sensor ground3 Sensor 2 signal4 Sensor 1 signal5 5 volt supply6 ACCELERATOR PEDAL POSITION SENSOR (APP) The APP sensors are located on the accelerator pedal assembly. The APP...
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Upstream Oxygen Sensors Downstream Oxygen Sensors The oxygen sensors need to operate at high temperatures in order to function correctly. To achieve the high temperatures required, the sensors are fitted with heater elements that are controlled by a PWM signal from the ECM. The heater elements are operated immediately following engine start and also during low load conditions when the temperature of the exhaust gases is insufficient to maintain the required sensor temperatures. A non-functioning heater...
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•Sensor open circuit / disconnected. •Short circuit to vehicle supply or ground. •Lambda ratio outside operating band. •Crossed sensors bank A & B. •Contamination from leaded fuel or other sources. •Change in sensor characteristic. •Harness damage. •Air leak into exhaust system. Failure Symptoms •Default to Open Loop fuelling for the particular cylinder bank •High CO reading. •Strong smell of H02S (rotten eggs) till default condition. •Excess Emissions. It is possible to fit front and rear sensors in...
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The engine has 8 fuel injectors (one per cylinder), each injector is directly driven by the ECM. The injectors are fed by a common fuel rail as part of a ‘returnless’ fuel system. The fuel rail pressure is regulated to 4.5 bar by a fuel pressure regulator which is integral to the fuel pump module, within the fuel tank. The injectors can be checked by resistance checks. There is a fuel pressure test Schrader valve attached to the fuel rail on the front LH side for fuel pressure testing purposes. The ECM...
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VARIABLE VALVE TIMING (VVT) Variable valve timing is used on the V8 engine to enhance low and high speed engine performance and idle speed quality. For each inlet camshaft the VVT system comprises: •VVT unit •Valve timing solenoid The VVT system alters the phase of the intake valves relative to the fixed timing of the exhaust valves, to alter: •The mass of air flow to the cylinders. •The engine torque response. •Emissions. The VVT unit uses a vane type device to control the camshaft angle. The system...
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the high viscosity of the oil. While at high oil temperatures the low oil viscosity may impair the VVT operation at low oil pressures. The oil pump has the capacity to cope with these variations in oil pressure while an oil temperature sensor is monitored by the ECM to provide oil temperature feedback. At extremely high oil temperatures the ECM may limit the amount of VVT advance in order to prevent the engine from stalling when returning to idle speed. VVT does not operate when engine oil pressure is...