ENGINE 1.3 QUADRAJET (75PS) 74 ELECTRIC FUEL PUMP The electric fuel pump has a permanent magnet electric motor (1) which controls the pump (2) impeller and a terminal support cover (3) which contains the electrical and hydraulic connections. The pump stage is the single, peripheral flow type with high performance under low voltage and temperature conditions. FUELPUMPOPERATIONCHECKINGPROCEDURE: a. Remove fuel filler cap. b. Release the fuel system pressure. (Refer Fuel pressure relief procedure) c. Turn ignition switch ‘ON’ d. Check fuel pump operation by listening to the sound at fuel pump end. e. If no sound is heard, measure voltage between fuel pump electrical connector wire to chassis ground. The voltage should be approx. 12V. f. If voltage is not correct, check for fuel pump relay and related wiring harness. g. If you do not measure 12V, check for continuity of fuel pump connector as per circuit diagram. h. If there is continuity, replace fuel pump. i. If there is no continuity, repair the ground circuit. FUELPUMPPRESSURECHECKINGPROCEDURE: a. Release the fuel system pressure. (Refer Fuel pressure relief procedure) b. Remove fuel delivery connector. c. Connect fuel pressure gauge (having a range of 0 - 10bar) to the delivery port of the fuel pump. d. Confirm battery voltage (12V) e. Turn ignition switch ON to operate fuel pump and after 2 seconds turn it OFF. Repeat this 3-4 times and measure fuel pump pressure. It should be 2.5 bar. f. If it is not within specification, replace fuel pump. 1. If the pressure is high, check for (i) Fuel delivery line for any blockage. (ii) If the delivery line is clean, replace fuel pump. 2. If the pressure is too low, check for (i) Block delivery line and check if pressure rises. (ii) If pressure does rise, reassemble fuel pump. (iii) If pressure does not rise, replace fuel pump or check for leakages. g. After checking fuel pressure, remove fuel pressure gauge. h. Connect fuel delivery connector to fuel pump nipple and ensure that quick fix couplings are properly fitted. i. With engine OFF and ignition ON check for fuel leakage. C. FUEL LEVEL SENSOR Fuel level sensor assembly consists of major parts as TFR Holder assembly and Float Arm Assembly. Fuel level sensor wiring harness is connected to module connector (under the module cover). Fuel level sensor assembly provides the signal to indicate the fuel level in the tank. As the float arm assembly moves w.r.to the fuel level in t ank, resistance at sensor harness varies accordingly. REMOVAL: 1. Disconnect battery. 2. Remove fuel module assembly from vehicle. (Refer Fuel module removal procedure). 3. Disconnect electrical connector of fuel level sensor. 4. Pry out two locks (using suitable tool) located at either end of fuel level senso.r NOTE: Please note that level sensor holder has the snaps on both sides. Enough care need to be taken to avoid damages to the snaps onmodule and level sensor
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