On-Vehicle Inspection

CHECK FUEL PRESSURE
1. Discharge the fuel pressure and take precautions against possible fuel spillage (see FUEL SYSTEM (3MZ-FE) ).
2. Check that the battery voltage is above 12 V.
3. Disconnect the engine wire No. 3 (battery negative terminal).
4. Pull out the fuel tube connector from a new fuel tube.
  HINT:
  
  Part No. 23801-20190
  
  Fig 1: Locating Fuel Tube Connector
  Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
5. Remove the fuel pipe clamp.
  
  Fig 2: Removing Fuel Pipe Clamp
  Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
6. Disconnect the quick connector from the fuel pipe by pinching portion A with your fingers as shown in the illustration.
  CAUTION:
  - After taking the precautions, disconnect the quick connector.
  - As pressure remains in the fuel line, prevent it from splashing inside the engine compartment.
  Fig 3: Disconnecting Quick Connector From Fuel Pipe
  Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
7. Install SST (a pressure gauge) and fuel tube connector using SST as shown in the illustration.
  1. SST 09268-41047 (95336-08070), 09268-45014 (09268-41250, 09268-41200, 09268-41220)
8. Wipe up any gasoline.
9. Reconnect the engine wire No. 3 (battery negative terminal).
  
  Fig 4: Installing SST & Fuel Tube Connector
  Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
10. Connect the hand-hand tester to the DLC3.
11. Measure the fuel pressure.
  1. Fuel pressure:
  2. 304 to 343 kPa (3.1 to 3.5 kgf/cm ² , 44 to 50 psi)
  If the pressure is high, replace the fuel pressure regulator.
  
  If the pressure is low, check the fuel hose connections, fuel pump, fuel filter and fuel pressure regulator.
12. Disconnect the hand-held tester from the DLC3.
13. Start the engine.
14. n) Measure the fuel pressure at idle.
  
  Fig 5: Connecting DLC3 Terminal To Hard Held Tester
  Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
  1. Fuel pressure:
  2. 304 to 343 kPa (3.1 to 3.5 kgf/cm ² , 44 to 50 psi)
15. Stop the engine.
16. Check that the fuel pressure remains as specified for 5 minutes after the engine has stopped.
  1. Fuel pressure: 147 kPa (1.5 kgf/cm ² , 21 psi) or more
  If the pressure is not as specified, check the fuel pump, pressure regulator and/or fuel injectors.
17. After checking the fuel pressure, disconnect the battery negative terminal and carefully remove SST and the fuel tube connector to prevent gasoline splash.
18. Reconnect the No. 1 fuel pipe (the fuel tube connector).
CAUTION: After taking the precautions, connect the quick connector.
CHECK FUEL PUMP OPERATION AND FUEL LEAK
1. When using the hand-held tester.
  1. Connect the hand-held tester to the DLC3.
  2. Turn the ignition switch ON and the hand-held tester ON.
    NOTE: Do not start the engine.
  3. Select the ACTIVE TEST mode on the hand-held tester.
  4. If you need help to select the ACTIVE TEST mode on the hand-held tester, refer to the hand-held tester operator's manual.
    
    Fig 6: Connecting DLC3 Terminal To Hand Held Tester
    Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
2. When not using the hand-held tester.
  1. Remove the circuit opening relay.
  2. Using a service wire, connect terminals FP and +B of the engine room relay block.
    NOTE: Pay due attention to the terminal connecting position to avoid a malfunction.
  3. Turn the ignition switch ON, and check that the fuel pump operates.
  NOTE: Do not start the engine.
3. Check that there are no fuel leaks after doing maintenance anywhere on the fuel system.
  
  Fig 7: Connecting Terminals FP & +B Of Engine Room Relay Block
  Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002