ENGINE ON-VEHICLE INSPECTION

PROCEDURE


  1. INSPECT ENGINE IDLE SPEED

    Note


    • Turn all the electrical systems and A/C off.

    • Inspect the engine idle speed with the cooling fan off.

    • When checking the idle speed, move the shift lever to neutral.

    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 as a substitute.


    1. Warm up and stop the engine.

    2. When using the intelligent tester:


      1. Connect the intelligent tester to the DLC3.

      2. Start the engine and idle it.

      3. Enter the following menus: Powertrain / Engine / Data List / Engine SPD.

    3. When not using the intelligent tester:


      1. A004N39E32

        Connect a tester probe of a tachometer to terminal 9 (TAC) of the DLC3 with SST.

        SST
        09843-18040

      2. Start the engine and idle it.

    4. Inspect the engine idle speed.

      Standard idle speed
      720 to 820 rpm

    5. Turn the ignition switch off.

    6. Disconnect the intelligent tester or tachometer tester probe from the DLC3.

  2. INSPECT MAXIMUM ENGINE SPEED


    1. Start the engine.

    2. Fully depress the accelerator pedal.

    3. Check the maximum engine speed.

      Maximum engine speed
      5100 to 5250 rpm

  3. INSPECT COMPRESSION


    1. Warm up and stop the engine.

    2. Disconnect the connectors from the injectors.

    3. Remove the glow plugs Click here.

    4. Inspect the cylinder compression pressure.


      1. A004REXE02
        Text in Illustration
        *1 SST (Attachment)

        Insert SST (attachment) into the glow plug hole.

        SST
        09992-00026   ( 09992-00121 )
      2. A004QVZE02
        Text in Illustration
        *1 SST (Compression Gauge)

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

        SST
        09992-00026   ( 09992-00211 )

      3. While cranking the engine, measure the compression pressure.

        Standard compression pressure
        2500 kPa (25.5 kgf/cm2, 362 psi) or higher
        Minimum pressure
        2200 kPa (22.5 kgf/cm2, 320 psi)
        Difference between each cylinder
        500 kPa (5.0 kgf/cm2, 71 psi) or less

        Note


        • Use a fully-charged battery so the engine speed can be increased to 280 rpm or more.

        • Inspect the other cylinders in the same way.

        • Measure the compression as quickly as possible.

      4. If the cylinder compression is low, pour a small amount of engine oil into the cylinder through the glow plug holes, and then inspect it again.

        If adding oil increases the compression pressure, the piston rings and/or cylinder bore may be worn or damaged.

        If the pressure stays low, the valve may be stuck or seated improperly, or there may be leakage from the gasket.

    5. Remove SST (attachment and compression gauge).

    6. Connect the connectors to the injectors.

    7. Install the glow plugs Click here.