Engine On-Vehicle Inspection

Engine Hybrid System. Hilux. Tgn26, 36 Kun25, 26, 35, 36 Ggn25
1Kd-Ftv Engine Mechanical. Hilux. Tgn26, 36 Kun25, 26, 35, 36 Ggn25

  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.



    Hilux. Tgn26, 36 Kun25, 26, 35, 36 Ggn25.1Kd-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.

    1. Start the engine and measure the idle speed.

      Standard idle speed:
      700 to 800 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 (HILUX_TGN26 RM0000013XP01BX.html).

  1. Disconnect the 4 injector connectors.

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



    Hilux. Tgn26, 36 Kun25, 26, 35, 36 Ggn25.1Kd-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 (HILUX_TGN26 RM0000013ZT01BX.html).