ENGINE ON-VEHICLE INSPECTION


  1. INSPECT ENGINE COOLANT

    Click here

  2. INSPECT ENGINE OIL

    Click here

  3. INSPECT BATTERY

    Click here

  4. INSPECT AIR CLEANER FILTER ELEMENT SUB-ASSEMBLY


    1. Remove the air cleaner filter element sub-assembly.

    2. Visually check that the air cleaner filter is not excessively damaged or oily. If necessary, replace the air cleaner filter.

      Tech Tips


      • If there is any dirt or a blockage in the air cleaner filter element sub-assembly, clean it with compressed air.

      • If any dirt or a blockage remains even after cleaning the air cleaner filter element sub-assembly with compressed air, replace it.

    3. Install the air cleaner filter element sub-assembly.

  5. INSPECT SPARK PLUG

    Click here

  6. INSPECT VALVE LASH ADJUSTER ASSEMBLY NOISE


    1. Rev up the engine several times. Check that the engine does not emit unusual noises.

      If unusual noises occur, warm up the engine and idle it for over 30 minutes. Then perform the inspection above again.

      If any defects or problems are found during the inspection above, perform a lash adjuster inspection Click here.

  7. INSPECT IGNITION TIMING


    1. Warm up and stop the engine.

    2. When using the GTS:


      1. Connect the GTS to the DLC3.

      2. Start the engine and idle it.

      3. Turn the GTS main switch on.

      4. Enter the following menus: Powertrain / Engine / Data List / IGN Advance.

        Standard ignition timing
        5 to 15° BTDC at idle

        Tech Tips

        Refer to the GTS operator's manual for further details.

        If the ignition timing is not as specified, check the valve timing.

      5. Check that the ignition timing advances immediately when the engine speed is increased.

      6. Enter the following menus: Powertrain / Engine / Active Test / Connect the TC and TE1 / ON.

      7. Monitor IGN Advance of the Data List.

        Standard ignition timing
        8 to 12° BTDC at idle

        Tech Tips

        Refer to the GTS operator's manual for further details.

        If the ignition timing is not as specified, check the valve timing.

      8. Enter the following menus: Connect the TC and TE1 / OFF.

      9. Turn the ignition switch off.

      10. Disconnect the GTS from the DLC3.

    3. When not using the GTS:


      1. Remove the No. 1 engine cover sub-assembly.

      2. A01EK2Q

        Connect the tester probe of a timing light to the wire of the ignition coil connector for the No. 1 cylinder.

        Note

        Use a timing light that detects primary signals.

      3. A01EKUIE79

        Using SST, connect terminals 13 (TC) and 4 (CG) of the DLC3.

        SST
        09843-18040

        Note


        • Confirm the terminal numbers before connecting them. Connecting the wrong terminals can damage the engine.

        • When checking the ignition timing, the transmission should be in neutral.

      4. Using a timing light, check the ignition timing.

        Standard ignition timing
        8 to 12° BTDC at idle

      5. Remove SST from the DLC3.

      6. Check the ignition timing.

        Standard ignition timing
        5 to 15° BTDC at idle

        If the ignition timing is not as specified, check the valve timing.

      7. Check that the ignition timing advances immediately when the engine speed is increased.

      8. Disconnect the timing light from the engine.

      9. Install the No. 1 engine cover sub-assembly.

  8. INSPECT ENGINE IDLE SPEED


    1. Warm up and stop the engine.

    2. When using the GTS:


      1. Connect the GTS to the DLC3.

        Note

        Switch off all accessories and the A/C before connecting the GTS.

      2. Race the engine at 2500 rpm for approximately 90 seconds.

      3. Turn the GTS on.

      4. Enter the following menus: Powertrain / Engine / Data List / Engine Speed.

        Standard idle speed
        600 to 700 rpm

        Tech Tips

        Refer to the GTS operator's manual for further details.

        Note

        When checking the idle speed, the transmission should be in neutral.

        If the idle speed is not as specified, check the air intake system.

      5. Disconnect the GTS from the DLC3.

    3. When not using the GTS:


      1. A01EKUIE88

        Using SST, connect a tachometer probe to terminal 9 (TAC) of the DLC3.

        SST
        09843-18030

        Note

        Confirm the terminal number before connecting the probe. Connecting the wrong terminals can damage the engine.

      2. Race the engine at 2500 rpm for approximately 90 seconds.

      3. Check the idle speed.

        Standard idle speed
        600 to 700 rpm

        Note


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

        • Inspect the idle speed with the cooling fans off.

        • When checking the idle speed, the transaxle should be in neutral.

        If the speed is not as specified, check the air intake system.

      4. Disconnect the tachometer probe from the DLC3.

  9. INSPECT COMPRESSION


    1. Warm up and stop the engine.

    2. Check for DTCs Click here.

    3. Remove the No. 1 engine cover sub-assembly.

    4. Disconnect the 4 fuel injector connectors.

    5. Remove the 4 bolts and 4 ignition coils.

    6. Remove the 4 spark plugs.

    7. A01EJ1V

      Insert a compression gauge into the spark plug hole.

    8. Fully open the throttle.

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

      Standard compression pressure
      1450 kPa (14.7 kgf/cm2, 210 psi) or higher
      Minimum pressure
      980 kPa (9.9 kgf/cm2, 142 psi)
      Difference between each cylinder
      200 kPa (2.0 kgf/cm2, 29 psi) or less

      Tech Tips

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

    10. If the cylinder compression is low in one or more cylinders, pour a small amount of engine oil into the cylinder with low compression through its spark plug hole. Then inspect the cylinder compression pressure again.

      Tech Tips


      • If adding oil helps boost the compression, it is likely that the piston rings and/or cylinder bore is worn or damaged.

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

    11. Install the 4 spark plugs.

      Torque:
      25 N*m  { 254 kgf*cm, 18 ft.*lbf }

    12. Install the 4 ignition coils with the 4 bolts.

      Torque:
      10 N*m  { 102 kgf*cm, 7 ft.*lbf }

    13. Connect the 4 fuel injector connectors.

    14. Install the No. 1 engine cover sub-assembly.

    15. Clear the DTCs Click here.

  10. INSPECT CO/HC

    Tech Tips

    This check determines whether or not the idle CO/HC complies with regulations.


    1. Start the engine.

    2. Keep the engine speed at 2500 rpm for approximately 180 seconds.

    3. Insert the CO/HC meter testing probe at least 40 cm (1.31 ft.) into the tailpipe during idling.

    4. Immediately check CO/HC concentration at idle and 2500 rpm.

      Tech Tips


      • When performing the 2 mode (2500 rpm and idle) test, follow the measurement order prescribed by the applicable local regulations.

      • If the CO/HC concentration does not comply with regulations, troubleshoot in the order given below.


      1. Check for DTCs Click here.

      2. See the table below for possible causes, and then inspect and correct the applicable causes if necessary.

        CO HC Symptom Causes
        Normal High Rough idle

        • 1. Faulty ignitions


          • Incorrect timing

          • Plugs are contaminated or shorted, or gaps are defective

        • 2. Leaky intake and exhaust valves

        • 3. Leaky cylinder
        Low High

        Rough idle

        (Fluctuating HC reading)

        • 1. Vacuum leaks


          • PCV hose

          • Intake manifold

          • Throttle body

          • Brake booster line

        • 2. Lean mixture causing misfire
        High High

        Rough idle

        (Black smoke from exhaust)

        • 1. Restricted air filter

        • 2. Faulty SFI system


          • Faulty pressure

          • Defective ECT sensor

          • Faulty ECM

          • Faulty injector

          • Faulty throttle position sensor

          • Faulty MAF sensor