Fuel Pump Ballast Resistor Relay: Testing and Inspection

Fig. 18 Fuel pump control system.:

Fig. 19 Connecting resistor.:

1. Remove the intercooler.
2. Disconnect the air intake temperature sensor connector and connect a resistor (3.5 k ohms), Fig. 19, to the terminals of the sensor connector.
3. Install the intercooler.

Fig. 20 Checking voltage.:

4. Connect a voltmeter between B terminal and Bu terminal of the fuel pump connector Fig. 20.
5. Warm up the engine and stop it.

Fig. 21 Terminal voltage chart.:

6. Restart the engine and check the voltage Fig. 21.
7. Check the fuel pump resistor relay, 3D terminal of the control unit, engine wiring harness and connectors, if necessary.