ENGINE ON-VEHICLE INSPECTION

CAUTION / NOTICE / HINT

Tech Tips

The type of ignition switch used on this model differs according to the specifications of the vehicle. For the expressions listed in this section, refer to the "Ignition Switch Expressions" precaution Click here.

PROCEDURE


  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 cap.

    2. Remove the air filter element.

    3. Visually check that the air filter is not excessively damaged or oily.

      If necessary, replace the air cleaner filter element.

  5. INSPECT SPARK PLUG

    Click here

  6. INSPECT V-RIBBED BELT

    Click here

  7. INSPECT VALVE LASH ADJUSTER 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.

  8. INSPECT IGNITION TIMING


    1. Warm up and stop the engine.

    2. When using an intelligent tester:


      1. Connect the intelligent tester to the DLC3.

      2. Start the engine and idle it.

      3. Turn the intelligent tester main switch on.

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

        Standard ignition timing
        8 to 12° BTDC @ idle

        Tech Tips

        Refer to the intelligent tester operator's manual for further details.

        Note


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

        • Check the ignition timing with the cooling fan off.

        • When checking the ignition timing, the shift lever should be in neutral or P (for CVT).

    3. When not using the intelligent tester:


      1. Remove the No. 2 cylinder head cover.

      2. A00580A

        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. Start the engine and idle it.

      4. A0053SHE68
        Text in Illustration
        *1 Front view of DLC3

        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 shift lever should be in neutral or P (for CVT).

      5. A00568P

        Using the timing light, check the ignition timing.

        Standard ignition timing
        8 to 12° BTDC @ idle

        Note


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

        • Check the ignition timing with the cooling fan off.

        • When checking the ignition timing, the shift lever should be in neutral or P (for CVT).

      6. Remove SST from the DLC3.

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

      8. Turn the ignition switch off.

      9. Remove the timing light.

      10. Install the No. 2 cylinder head cover.

  9. INSPECT ENGINE IDLE SPEED


    1. Warm up and stop the engine.

    2. When using the intelligent tester:


      1. Connect the intelligent tester to the DLC3.

      2. Turn the ignition switch to ON.

      3. Enter the following menus: Powertrain / Engine and ECT / Data List / Engine Speed.

        Standard Idle Speed
        Item Specified Condition
        for Manual Transaxle 580 to 680 rpm
        for CVT 600 to 700 rpm

        Tech Tips

        Refer to the intelligent tester operator's manual for further details.

        Note


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

        • Check the ignition timing with the cooling fan off.

        • When checking the idling speed, the shift lever should be in neutral or P (for CVT).

    3. Turn the ignition switch off.

    4. Disconnect the intelligent tester from the DLC3.

    5. A0053SHE69
      Text in Illustration
      *1 Front view of DLC3

      When not using the intelligent tester:


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

        SST
        09843-18030

        Note


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

        • When checking the idling speed, the shift lever should be in neutral or P (for CVT).

      2. Check the idle speed.

        Standard Idle Speed
        Item Specified Condition
        for Manual Transaxle 580 to 680 rpm
        for CVT 600 to 700 rpm

      3. Disconnect the tachometer probe from the DLC3.

  10. INSPECT COMPRESSION


    1. Warm up and stop the engine.

    2. Check for DTCs Click here.

    3. Remove the No. 2 cylinder head cover.

    4. Remove the cowl top ventilator louver Click here.

    5. Remove the 4 bolts and 4 ignition coils.

    6. Remove the 4 spark plugs.

    7. Disconnect the 4 fuel injector connectors.

    8. A0055XNE01
      Text in Illustration
      *1 Compression Gauge

      Inspect the 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.

        Standard compression pressure
        1373 kPa (14.0 kgf/cm2, 199 psi) or higher
        Minimum pressure
        1079 kPa (11.0 kgf/cm2, 156 psi)
        Difference between each cylinder
        98 kPa (1.0 kgf/cm2, 14.2 psi) or less

        CAUTION:

        Wear protective gloves when measuring the compression to avoid injuring your hands on the outer cowl top panel.

        Note


        • Use a fully-charged battery so the engine speed can be increased to 250 rpm or more.

        • Inspect the other cylinders in the same way.

        • Measure the compression in as short a time as possible.

      4. If the cylinder compression is low, pour a small amount of engine oil into the cylinder through the spark plug hole, and 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 the pressure stays low, the valve may be stuck or seated improperly, or there may be leakage from the gasket.

    9. Connect the 4 fuel injector connectors.

    10. Install the 4 spark plugs.

      Torque:
      20 N*m  { 204 kgf*cm, 15 ft.*lbf }

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

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

    12. Install the cowl top ventilator louver Click here.

    13. Install the No. 2 cylinder head cover.

    14. Clear the DTCs Click here.

  11. INSPECT CO/HC


    1. Start the engine.

    2. Run the engine 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 while idling.

    4. Check the CO/HC concentration during idling and when the engine is running at 2500 rpm.

      Tech Tips

      When doing the 2 mode (with the engine idling/ running at 2500 rpm) test, the measuring procedures are determined by applicable local regulations.

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


      1. Check the air fuel ratio sensor (See page ) and heated oxygen sensor operation Click here.

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

        CO HC Problems Possible Causes
        Normal High Rough idling

        1. Faulty ignition:


          • Incorrect timing

          • Plugs are contaminated or shorted, or gaps are defective

        2. Incorrect valve clearance

        3. Leakage from intake or exhaust valves

        4. Leakage from cylinders
        Low High

        Rough idling

        (Fluctuating HC reading)

        1. Vacuum leaks:


          • PCV hoses

          • Intake manifold

          • Throttle body

          • Brake booster line

        2. Lean mixture causing misfire
        High High

        Rough idling

        (Black smoke from exhaust)

        1. Restricted air cleaner filter element

        2. Plugged PCV valve

        3. Faulty SFI system:


          • Faulty pressure regulator

          • Faulty engine coolant temperature sensor

          • Faulty mass air flow meter

          • Faulty ECM

          • Faulty injectors

          • Faulty throttle body