FUEL SYSTEM ON-VEHICLE INSPECTION

PROCEDURE

1. CHECK FUEL PRESSURE (w/ Glow Plug Controller)

   
   

   1. Read Data List

      Note

      In the table below, the values listed under "Normal Condition" are reference values. Do not depend solely on these reference values when deciding whether a part is faulty or not.

      Tech Tips

      Using the GTS to read the Data List allows the values or states of switches, sensors, actuators and other items to be read without removing any parts. This non-intrusive inspection can be very useful because intermittent conditions or signals may be discovered before parts or wiring is disturbed. Reading the Data List information early in troubleshooting is one way to save diagnostic time.

      
      

      1. Warm up the engine.

      2. Turn the ignition switch off.

      3. Connect the GTS to the DLC3.

      4. Turn the ignition switch to ON.

      5. Turn the GTS on.

      6. Enter the following menus: Powertrain / Engine and ECT / Data List.

         
         Powertrain > Engine and ECT > Data List

         Tester Display
         Target Common Rail Pressure
         Common Rail Pressure

      7. Read the Data List.

         Tester Display	Measurement Item/Range	Normal Condition
         Target Common Rail Pressure	Target common rail pressure/ Min.: 0 kPa, Max.: 655350 kPa	25000 to 185000 kPa: Engine running
         Common Rail Pressure	Common rail pressure/ Min.: 0 kPa, Max.: 655350 kPa	Idling: 25000 to 35000 kPa 4000 rpm: 80000 to 120000 kPa Common Rail Pressure = Target Common Rail Pressure +/-10000 kPa at stable condition

2. CHECK FUEL PRESSURE (w/o Glow Plug Controller)

   
   

   1. Read Data List

      Note

      In the table below, the values listed under "Normal Condition" are reference values. Do not depend solely on these reference values when deciding whether a part is faulty or not.

      Tech Tips

      Using the GTS to read the Data List allows the values or states of switches, sensors, actuators and other items to be read without removing any parts. This non-intrusive inspection can be very useful because intermittent conditions or signals may be discovered before parts or wiring is disturbed. Reading the Data List information early in troubleshooting is one way to save diagnostic time.

      
      

      1. Warm up the engine.

      2. Turn the ignition switch off.

      3. Connect the GTS to the DLC3.

      4. Turn the ignition switch to ON.

      5. Turn the GTS on.

      6. Enter the following menus: Powertrain / Engine and ECT / Data List.

         
         Powertrain > Engine and ECT > Data List

         Tester Display
         Target Common Rail Pressure
         Fuel Press

      7. Read the Data List.

         Tester Display	Measurement Item/Range	Normal Condition
         Fuel Press	Fuel pressure/ Min.: 0 kPa, Max.: 655350 kPa	Idling: 19900 to 37000 kPa 4000 rpm: 50700 to 73000 kPa Fuel Press = Target Common Rail Pressure +/-10000 kPa at stable condition
         Target Common Rail Pressure	Target common rail pressure/ Min.: 0 kPa, Max.: 655350 kPa	20800 to 180000 kPa when engine running

3. INSPECT FOR FUEL LEAK (w/ Glow Plug Controller)

   
   

   1. Connect the GTS to the DLC3.

   2. Turn the ignition switch to ON.

   3. Turn the GTS on.

   4. Enter the following menus: Powertrain / Engine and ECT / Active Test.

      
      Powertrain > Engine and ECT > Active Test

      Tester Display
      Test the Fuel Leak

   5. Perform the Active Test.

      Tester Display	Measurement Item	Control Range	Diagnostic Note
      Test the Fuel Leak	Pressurizes common rail internal fuel pressure, and checks for fuel leaks	Stop/Start	Perform inspection of the high pressure fuel system. Test is possible when the following conditions are met: Ignition switch ON Engine running Shift lever in neutral

4. INSPECT FOR FUEL LEAK (w/o Glow Plug Controller)

   
   

   1. Connect the GTS to the DLC3.

   2. Turn the ignition switch to ON.

   3. Turn the GTS on.

   4. Enter the following menus: Powertrain / Engine and ECT / Active Test.

      
      Powertrain > Engine and ECT > Active Test

      Tester Display
      Test the Fuel Leak

   5. Perform the Active Test.

      Tester Display	Measurement Item	Control Range	Diagnostic Note
      Test the Fuel Leak	Pressurizes common rail internal fuel pressure, and checks for fuel leaks	Stop/Start	Perform inspection of the high pressure fuel system. Test is possible when the following conditions are met: Ignition switch ON Engine is running Shift lever is in neutral Results of real-vehicle check: Engine Speed: 2700 rpm Fuel Press: 104620 kPa Target Common Rail Pressure: 103250 kPa Target Pump SCV Current: 1215 mA MAP: 125 kPa MAF: 37.94 gm/sec.