On-Vehicle Inspection

CHECK FUEL PUMP OPERATION
1. Connect the LEXUS hand-held tester to the DLC3.
2. Turn the ignition switch ON and LEXUS hand-held tester main switch ON.
  NOTE: Do not start the engine.
3. Select the active test mode on the LEXUS hand-held tester.
4. Please refer to the LEXUS hand-held tester operator's manual for further details.
5. If you have no LEXUS hand-held tester, connect the positive (+) lead form the battery to terminal 4 of the connector, and the negative (-) lead to terminal 5.
CHECK FUEL PRESSURE
1. Check the battery positive voltage is above 12 V.
2. Disconnect the negative (-) terminal cable from the battery.
3. Remove the fuel pressure pulsation damper from the RH delivery pipe (See REPLACEMENT ).
  
  Fig 1: Connecting Positive (+) Lead Form Battery To Terminal 4 Of Connector & Negative (-) Lead To Terminal 5
  Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
4. Install the rear fuel pipe and SST (pressure gauge) to the delivery pipe with 3 lower gaskets and SST (union bolt).
  SST 09268-45014 (09268-41190, 90405-06167)
  
  Torque: 39 N.m (400 kgf.cm, 29 ft.lbf)
5. Wipe off any splattered gasoline.
6. Reconnect the negative (-) terminal cable to the battery.
7. Connect a LEXUS hand-held tester to the DLC3. (See step 1 in check fuel pump operation (a) to (e))
8. Measure the fuel pressure.
  
  Fig 2: Installing Rear Fuel Pipe & SST (Pressure Gauge) To Delivery Pipe With Lower Gaskets & SST (Union Bolt)
  Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
  
  Fuel pressure:
  
  304 - 343 kPa (3.1 - 3.5 kgf/cm ² , 44 - 50 psi)
  
  If pressure is high, replace the fuel pressure regulator.
  
  If pressure is low, check these parts:
  - Fuel hoses and connections
  - Fuel pump
  - Fuel filter
  - Fuel pressure regulator
9. Disconnect the LEXUS hand-held tester from the DLC3.
10. Start the engine.
11. Measure the fuel pressure at idle.
  Fuel pressure:
  
  304 - 343 kPa (3.1 - 3.5 kgf/cm ² , 44 - 50 psi)
12. Stop the engine.
13. Check that the fuel pressure remains as specified for 5 minutes after the engine has stopped.
  Fuel pressure: 147 kPa (1.5 kgf/cm ² , 21 psi) or more
  
  If pressure is not as specified, check the fuel pump, pressure regulator and/or injectors.
14. After checking fuel pressure, disconnect the negative (-) terminal cable from the battery and carefully remove the SST to prevent gasoline from splashing.
  SST 09268-45014
15. Reinstall the fuel pressure pulsation damper to the RH delivery pipe (See REPLACEMENT ).
16. Reconnect the negative (-) terminal cable to the battery.
17. Check for fuel leaks.