ENGINE ON-VEHICLE INSPECTION


  1. INSPECT ENGINE COOLANT


    1. Inspect the engine coolant Click here.

  2. INSPECT ENGINE OIL


    1. Inspect the engine oil Click here.

  3. INSPECT BATTERY


    1. Inspect the battery Click here.

  4. INSPECT AIR CLEANER FILTER ELEMENT SUB-ASSEMBLY


    1. Remove the air cleaner filter element from the cylinder head cover sub-assembly.

    2. Visually check that there is no dirt, clog, and/or damage to the air cleaner filter element.

      Tech Tips


      • If there is any dirt or a clog on the air cleaner filter element, clean it with compressed air.

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

  5. INSPECT SPARK PLUG


    1. Inspect the spark plug Click here.

  6. INSPECT IGNITION TIMING

    Note


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

    • Inspect the ignition timing with the cooling fan off.

    • When checking the ignition timing, shift the transmission to the neutral position.


    1. Warm up and stop the engine.

    2. A0136OXE04

      When using the intelligent tester:


      1. Connect the intelligent tester to the DLC3.

      2. Turn the ignition switch on.

      3. Select the item:

        Powertrain / Engine and ETC / Active Test / TE1 (TC) / ON.

        Tech Tips

        Refer to the intelligent tester operator's manual if you need help to select Active Test.

      4. Inspect the ignition timing at idle.

        Ignition timing
        8 to 12 degrees BTDC

      5. Select the item:

        TE1 (TC) / OFF

      6. Turn the ignition switch off.

      7. Disconnect the intelligent tester from the DLC3.

    3. When not using the intelligent tester:


      1. Remove the air cleaner cap sub-assembly Click here.

      2. A0137LD

        Install the tester terminal of a timing light to the position shown in the illustration.

        Note


        • Use a timing light that detects the first signal.

        • After checking, be sure to wrap the wire harness with tape.

      3. A0138PZE01

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

        SST
        09843-18040

        Note

        Make sure of the terminal numbers before connecting them. Connecting the wrong terminals can damage the engine.

      4. Turn the ignition switch on.

      5. Inspect the ignition timing at idle.

        Ignition timing
        8 to 12 degrees BTDC

        Tech Tips

        Run the engine speed at 1,000 to 1,300 rpm for 5 seconds, then check that the engine speed returns to the idle speed.

      6. Disconnect terminals 13 (TC) and 4 (CG) of the DLC3.

      7. Turn the ignition switch off.

      8. Remove the timing light.

      9. Install the air cleaner cap sub-assembly Click here.

  7. INSPECT ENGINE IDLE SPEED

    Note


    • Turn all the electrical system and the A/C OFF.

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

    • When checking the idle speed, shift the transmission to the neutral position.


    1. Warm up and stop the engine.

    2. A0136OXE05

      When using the intelligent tester:


      1. Connect the intelligent tester to the DLC3.

      2. Turn the ignition switch on.

      3. Select the item:

        Powertrain / Engine and ECT / Data List / Engine SPD.

        Tech Tips

        Refer to the intelligent tester operator's manual if you need help to select Data List.

      4. Inspect the engine idle speed.

        Idle speed
        790 to 890 rpm

      5. Turn the ignition switch off.

      6. Disconnect the intelligent tester from the DLC3.

    3. A0135ZHE01

      When not using the intelligent tester:


      1. Install SST to terminal 9 (TAC) of the DLC3, then connect a tachometer.

        SST
        09843-18040

        Note

        Make sure of the terminal numbers before connecting them. Connecting the wrong terminals can damage the engine.

      2. Turn the ignition switch on.

      3. Inspect the engine idling speed.

        Idle speed
        790 to 890 rpm

      4. Turn the ignition switch off.

      5. Disconnect a tachometer.

      6. Remove SST from terminal 9 (TAC).

  8. INSPECT COMPRESSION


    1. Warm up and stop the engine.

    2. Remove the air cleaner cap sub-assembly Click here.

    3. Remove the 3 ignition coils Click here.

    4. Remove the 3 spark plugs.

    5. Disconnect the 3 fuel injector connectors.

    6. A0137JR

      Inspect cylinder compression pressure.


      1. Insert a compression gauge into the spark plug hole.

      2. Fully open the throttle.

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

        Compression pressure (Normal condition)
        1,422 kPa (14.5 kgf/cm2, 206 psi)
        Minimum pressure
        1,079 kPa (11.0 kgf/cm2, 156 psi)
        Difference between each cylinder
        147 kPa (1.5 kgf/cm2, 21 psi) or less

        Note


        • Use a fully-charged battery so the engine speed can be increased to 400 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 light coat of engine oil into the cylinder through the spark plug hole, then inspect it again.

        Tech Tips


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

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

    7. Connect the 3 fuel injector connectors.

    8. Install the 3 spark plugs.

      Torque:
      25 N*m  { 255 kgf*cm, 18 ft.*lbf }

    9. Install the 3 ignition coils Click here.

    10. Install the air cleaner cap sub-assembly Click here.

  9. INSPECT CO/HC

    Tech Tips

    The ECM properly controls the CO/HC concentration in the emission gas.


    1. Start the engine.

    2. Run the engine at 2,500 rpm for approximately 180 seconds.

    3. Insert the CO/HC meter testing probe at least 40 cm (1.3 ft) into the tailpipe while idling.

    4. Check the CO/HC concentration at idle.

      Standard
      CO concentration
      0.2% or less
      HC concentration
      70 ppm or less

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


      • Check the heated oxygen sensor operation Click here.


      • See the table below for possible causes, then inspect the applicable causes and repair them if necessary.

      CO HC Problems Causes
      Normal High Rough idle

      1. Faulty ignitions:

        -Fouled, shorted or improperly gapped plugs

      2. Incorrect valve clearance

      3. Leaks in intake and exhaust valves

      4. Leaks in cylinders
      Low High

      Rough Idle

      (Fluctuating HC reading)

      1. Lean mixture causing misfire

      2. Faulty SFI systems:

        -Faulty pressure regulator

        -Defective engine coolant temperature sensor

        -Detective mass air flow meter

        -Faulty ECM

        -Faulty injectors

        -Faulty throttle body
      High High

      Rough idle

      (Black smoke from exhaust)

      1. Faulty SFI systems:

        -Faulty pressure regulator

        -Defective engine coolant temperature sensor

        -Detective mass air flow meter

        -Faulty ECM

        -Faulty injectors

        -Faulty throttle body