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FUEL PUMP CONNECTOR DISCONNECTION (HOW TO REDUCE PRESSURIZED FUEL PRESSURE)
Required Special Tools:
  • MB992744: Vehicle communication interface-Lite (V.C.I.-Lite)
  • MB992745: V.C.I.-Lite main harness A
  • MB992747: V.C.I.-Lite USB cable short
  • MB992748: V.C.I.-Lite USB cable long
When removing the fuel pipes and fuel hoses, follow the procedure below to release fuel pressure in the line and prevent fuel from running out, because fuel pressure in the fuel line is high.
 
 
<Low pressure side>
1. Remove the rear seat assembly (Refer to GROUP 52A, Rear Seat Assembly ) and turn up the floor carpet.
2. Remove the floor inspection lid (LH).
3. Disconnect the fuel pump module connector.
4. Crank the engine for two seconds or more, and turn the ignition switch to the "LOCK" (OFF) position.
noteIf the engine starts, wait until the engine stops by itself, then turn the ignition switch to the "LOCK" (OFF) position.
5. Connect the fuel pump module connector.
6. Install the floor inspection lid (LH).
7. Return the floor carpet to the original condition and install the rear seat assembly (Refer to GROUP 52A, Rear Seat Assembly ).
 
 
 
<High pressure side>
cautionTo prevent damage to scan tool (M.U.T.-IIISE), always turn the ignition switch to the "LOCK" (OFF) position before connecting or disconnecting scan tool (M.U.T.-IIISE).
1. Connect scan tool (M.U.T.-IIISE). Refer to HOW TO CONNECT THE SCAN TOOL (M.U.T.-IIISE) .
2. Start the engine and run at idle.
3. Set scan tool (M.U.T.-IIISE) to data reading mode for item 124, Fuel Rail Pressure Sensor (Absolute).
4. When the item 124 reaches approximately 4,000 kPa (1,181.3 in.Hg), turn the ignition switch to "LOCK" (OFF) position and wait until the engine is cool.
5. Disconnect scan tool (M.U.T.-IIISE).
warningTo prevent a fire, cover the hose connection with shop towels to prevent splash of fuel that could be caused by some residual pressure in the fuel pipe line.
6. Cover the connection between the fuel pump (high pressure) and fuel delivery intermediate pipe with shop towels.
7. Loosen the fuel delivery intermediate pipe at the fuel pump (high pressure).