Fuel Pump Control Module
The fuel pump control module is located in the rear LH quarter adjacent to the parking aid control module.
The fuel pump is control by the ECM. The ECM sends a PWM signal to the fuel pump control module from pin B20 of the ECM, the frequency of the signal determines the duty cycle of the pump. The PWM signal to the pump represents half the ON time of the pump. If the ECM transmits a 50% on time the fuel pump control module drives the pump at 100%. If the ECM transmits a 5% ON time the fuel pump control module drives the pump at 10%. The fuel pump control module will only turn the fuel pump ON if it receives a valid signal between 4% and 50%. When The ECM requires the fuel pump to be turned OFF the ECM transmits a duty cycle signal of 75%.
The status of the fuel pump control module is monitored by the ECM. Any errors can be retrieved from the ECM by the Jaguar recommended diagnostic tool. The fuel pump control module cannot be interrogated for diagnostic purposes.
The MAP controls the fuel pump control module in response to inputs from the fuel rail pressure sensor, MAP and the MAF/IAT sensor.