Engine On-Vehicle Inspection


  1. CHECK ENGINE IDLE SPEED AND MAXIMUM SPEED

  2. INSPECT CYLINDER COMPRESSION PRESSURE

Engine -- On-Vehicle Inspection



1. CHECK ENGINE IDLE SPEED AND MAXIMUM SPEED
HINT:
  1. For more information about the intelligent tester, refer to its operator's manual.
  2. If an intelligent tester is not available, use a tachometer's tester probe as a substitute.

  1. Connect the intelligent tester to the DLC3.



    Land Cruiser, Land Cruiser Prado. Grj150 Trj150,155 Kdj150,155 Lj150, Gdj150,155.1Kd-Ftv Engine Mechanical.Engine.Engine On-Vehicle Inspection

  1. 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
    Text in Illustration
    *a
    		Front view of DLC3

  1. Inspect the idle speed.

    HINT:
    1. Make sure that the engine is warmed up.
    2. Make sure that the A/C switch is off.
    3. w/ DPF:
      Make sure that PM regeneration is not being performed.

    1. Start the engine and measure the idle speed.

      Idle Speed:
      Item
      		Specified Condition
      for Automatic Transmission
      		650 to 750 rpm
      for Manual Transmission
      		610 to 710 rpm

  1. 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

  1. 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.

  1. Disconnect the intelligent tester from the DLC3.



2. INSPECT CYLINDER COMPRESSION PRESSURE
HINT:
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 (LandCruiser RM000000JIT01DX.html).

  1. Disconnect the 4 injector connectors.

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



    Land Cruiser, Land Cruiser Prado. Grj150 Trj150,155 Kdj150,155 Lj150, Gdj150,155.1Kd-Ftv Engine Mechanical.Engine.Engine On-Vehicle Inspection

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

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

      SST
      09992-00026(09992-00211)

    3. Measure the compression pressure while cranking the engine.

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

  1. 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
    NOTICE:
    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).
    HINT:
    1. If poor compression improves after adding engine oil, the piston rings and/or cylinder bore may be worn or damaged.
    2. If the pressure remains low, a valve may be stuck or seated improperly, or pressure may be dropping due to leakage through the gasket.

  1. Remove SST (attachment and compression gauge).

  1. Connect the 4 injector connectors.

  1. Install the 4 glow plugs (LandCruiser RM000000JIQ01GX.html).