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FUEL TANK PUMP OPERATION CHECK
Required Special Tool:
  • MB991958: Scan Tool (M.U.T.-III Sub Assembly)
    • MB991824: V.C.I.
    • MB991827: M.U.T.-III USB Cable
    • MB991910: M.U.T.-III Main Harness A
1. Using the scan tool MB991958, activate the fuel tank pump (integrated in the fuel tank pump module) to check the fuel tank pump operation.
2. If the fuel tank pump does not operate, follow the procedure below to check the pump for operation. If it is normal, check the driving circuit.
(1) Turn the ignition switch to the "LOCK" (OFF) position.
(2) Remove the second seat assembly (Refer to GROUP 52A, Second Seat Assembly ) and turn up the floor carpet.
(3) Remove the floor inspection lid (LH).
(4) Disconnect the fuel pump module connector.
(5) When the battery is connected to the fuel pump module connector (fuel pump module side), check that the pump operating sound can be heard. When the pump operating sound cannot be heard, replace the fuel pump module (Refer to GROUP 13C, On-Vehicle Service - Fuel Pump Module Replacement ) <FWD> or (Refer to GROUP 13C, On-Vehicle Service - Fuel Pump Module Replacement ) <AWD>.
noteThe operating sound of the fuel pump is difficult to be heard because the pump is in-tank type. Therefore, remove the fuel filler cap to check the sound from the fuel filler port.
(6) Connect the fuel pump module connector.
(7) Install the floor inspection lid (LH).
(8) Return the floor carpet to the original condition and install the second seat assembly (Refer to GROUP 52A, Second Seat Assembly ).