ENGINE ON-VEHICLE INSPECTION


  1. INSPECT ENGINE COOLANT

    Click here

  2. INSPECT ENGINE OIL

    Click here

  3. INSPECT BATTERY

    Click here

  4. INSPECT SPARK PLUG

    Click here

  5. INSPECT AIR CLEANER FILTER ELEMENT SUB-ASSEMBLY


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

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

      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.

  6. INSPECT IGNITION TIMING


    1. Warm up and stop the engine.

    2. When using the intelligent tester:


      1. Connect the intelligent tester to the DLC3.

        Note

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

      2. Start the engine and idle it.

      3. Turn the intelligent tester main switch on.

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

        Standard ignition timing
        BTDC 5 to 15 deg. at idle

        Tech Tips

        Refer to the intelligent tester 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
        BTDC 8 to 12 deg. at idle

        Tech Tips

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

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

      8. Enter the following menus: Powertrain / Engine / Active Test / Connect the TC and TE1 / OFF.

      9. Turn the ignition switch off.

      10. Disconnect the intelligent tester from the DLC3.

    3. When not using the intelligent tester:


      1. A01EUDS

        Open the wiring harness protector cover located to the right of the No. 4 ignition coil.

      2. Pull the wire harness out from the wiring harness protector cover.

      3. Connect the timing light to the wire harness.

        Note

        Use a timing light that detects the primary signal.

      4. A01ET0KE40
        Text in Illustration
        *a DLC3

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

        SST
        09843-18040

        Note


        • Confirm the terminals before connecting them. Connecting the wrong terminals may result in damage to electrical components.

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

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

        Standard ignition timing
        8 to 12° BTDC at idle

      6. Remove SST from the DLC3.

      7. 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.

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

      9. Disconnect the timing light from the engine.

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

  7. 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.

        Note


        • Switch off all accessories and the A/C before connecting the intelligent tester.

        • Inspect the idle speed with the cooling fans off.

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

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

      3. Turn the intelligent tester main switch on.

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

        Standard idle speed
        610 to 710 rpm

        Tech Tips

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

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

      5. Disconnect the intelligent tester from the DLC3.

    3. When not using the intelligent tester:


      1. A01ET0KE41
        Text in Illustration
        *a DLC3

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

        SST
        09843-18030

        Note


        • Confirm the terminal before connecting them. Connecting the wrong terminal may result in damage to electrical components.

        • 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.

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

      3. Check the idle speed.

        Standard idle speed
        610 to 710 rpm

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

      4. Disconnect the tachometer probe from the DLC3.

  8. INSPECT COMPRESSION


    1. Warm up and stop the engine.

    2. Remove the 4 spark plugs Click here.

      Note

      If the ignition coil assembly connector is disconnected because DTC is detected in inspection, always reconnect it.

    3. Disconnect the 4 fuel injector connectors.

    4. A01ESSS

      Insert a compression gauge into the spark plug hole.

    5. Fully open the throttle.

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

      Standard compression pressure
      1360 kPa (13.9 kgf/cm2, 197 psi)
      Minimum pressure
      980 kPa (10.0 kgf/cm2, 142 psi)
      Difference between each cylinder
      100 kPa (1.0 kgf/cm2, 15 psi) or less

      Tech Tips

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

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

    8. Connect the 4 fuel injector connectors.

    9. Install the 4 spark plugs Click here.

    10. Clear the DTCs Click here.

  9. 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 the DTCs Click here.

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

        CO HC Symptom Causes
        Normal High Rough idle

        • 1. Faulty ignition


          • Incorrect timing

          • Plugs are contaminated or shorted, or gaps are defective

        • 2. Incorrect valve clearance

        • 3. Leaky intake and exhaust valves

        • 4. 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