Fuel Pump: Testing and Inspection
FUEL PUMP OPERATION CHECKRequired Special Tool:
MB991502: Scan Tool (MUT-II)
1. Check the operating of the fuel pump by using scan tool MB991502 to force-drive the fuel pump.
2. If the fuel pump will not operate, check by using the following procedure. If normal, check the fuel pump drive circuit.
1. Turn the ignition switch "LOCK" (off) position.
2. Remove the fuel pump relay, and apply battery voltage to harness-side connector terminal number 2. Check that an operating sound can be heard from the fuel pump.
NOTE: As the fuel pump is an in-tank type, the fuel pump sound is hard to hear. Remove the fuel tank filler tube cap and check from the tank inlet
3. Check for fuel pressure by pinching the fuel hose with fingertips.
4. Install the fuel pump relay.