ENGINE (for DPF) ON-VEHICLE INSPECTION


  1. CHECK ENGINE IDLE SPEED AND MAXIMUM SPEED

    Tech Tips


    • For more information about the intelligent tester, refer to its operator's manual.

    • If an intelligent tester is not available, use a tachometer's tester probe as a substitute.


    1. Connect the intelligent tester to the DLC3.

    2. A01DW1ME07
      Text in Illustration
      *a Front view of DLC3

      If a tester is not available, connect the tester probe of a tachometer to terminal 9 (TAC) of the DLC3 with SST.

      SST
      09843-18040

    3. Inspect the idle speed.

      Tech Tips


      • Make sure that the engine is warmed up.

      • Make sure that the A/C switch is off.

      • Make sure that PM regeneration is not being performed.

      • for Automatic Transmission:

        Make sure that the transfer shift lever is not in the L4 position.


      1. Start the engine and measure the idle speed.

        Standard idle speed
        700 to 800 rpm

    4. Inspect the maximum speed.


      1. Start the engine.

      2. Fully depress the accelerator pedal.

      3. Measure the maximum speed.

        Maximum speed
        4450 to 4750 rpm

    5. If the tester probe of a tachometer is connected to the DLC3, disconnect the tester probe together with SST from terminal 9 of the DLC3.

    6. Disconnect the intelligent tester from the DLC3.

  2. INSPECT CYLINDER COMPRESSION PRESSURE

    Tech Tips

    Measure the compression pressure if the engine power is insufficient, oil is consumed excessively and/or fuel economy is poor.


    1. Remove the 4 glow plugs Click here.

    2. Disconnect the 4 injector connectors.

    3. Crank the engine to expel soot and other foreign matter from the inside of the cylinder.

    4. A01DXS4E01
      Text in Illustration
      *1 SST (Compression Gauge)
      *2 SST (Attachment)

      Measure the compression pressure.


      1. Install SST (attachment) to the glow plug hole.

        SST
        09992-00026   ( 09992-00121 )
        Torque:
        13 N*m  { 133 kgf*cm, 10 ft.*lbf }

      2. Connect SST (compression gauge) to SST (attachment).

        SST
        09992-00026   ( 09992-00211 )

      3. Measure the compression pressure while cranking the engine.

        Tech Tips

        Always use a fully charged battery to obtain an engine speed of 250 rpm or more.

    5. Perform the procedure above for each cylinder.

      Standard compression pressure
      2700 kPa (27.5 kgf/cm2, 391 psi) or higher
      Minimum pressure
      2200 kPa (22.5 kgf/cm2, 320 psi)
      Standard difference between each cylinder
      500 kPa (5.0 kgf/cm2, 71 psi) or less

      Note

      This measurement must be done in as short a time as possible.

      If the compression in one or more cylinders is low, add a small amount of engine oil into the glow plug hole. Then, repeat the procedure above for the low-compression cylinder(s).

      Tech Tips


      • If poor compression improves after adding engine oil, the piston rings and/or cylinder bore may be worn or damaged.

      • If the pressure remains low, a valve may be stuck or seated improperly, or pressure may be dropping due to leakage through the gasket.

    6. Remove SST (attachment and compression gauge).

    7. Connect the 4 injector connectors.

    8. Install the 4 glow plugs Click here.