14 486 PL ENGINE P Fig. 10 e) Cam shaft phase sensor Fig. 10 It senses the cam shaft position. It is mounted on rear side of the cylinder head towards intake camshaft side. ELECTRONIC CONTROL UNIT (ECU) FUNCTION : It is the hear t of the petrol injection system. It receives different engine parameters in the form of electrical signals and decides on the optimum air/fuel ratio required by the engine. WORKING : 1. The ECU receives electrical signals from different sensors. 2. These signals are then converted to digital signal wi th the help of analog to digi tal converters. 3. The ECU calculates the optimum air / fuel ratio required by the engine. 4. It converts the signals back to the analog form and sends it to the injectors. 5. The injectors remain open for a specified time. 6. The time depends upon the supply of voltage from the ECU. 7. In this fashion the optimum air/fuel ratio is fed into the cylinders. CAUTIONS : 1. Please don’t fix any washer on knock sensor. 2. Put cable tie for phase sensor cable in order to avoid touching hot EGR pipe. 3. High tension (HT) cables should be routed such that it should not foul with EGR pipe. 4. Fit the (high tension) HT cables in their respective bracket to avoid friction with fuel return line.
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