ENGINE ON-VEHICLE INSPECTION

PROCEDURE


  1. INSPECT ENGINE COOLANT

    Click here

  2. INSPECT ENGINE OIL

    Click here

  3. CHECK BATTERY CONDITION

    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 clogs in the air cleaner filter element sub-assembly, clean it with compressed air.

      • If any dirt or clogs remain 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 V-RIBBED BELT

    Click here

  7. INSPECT V-RIBBED BELT TENSIONER ASSEMBLY


    1. Remove the V-ribbed belt Click here.

    2. Check that nothing is caught in the V-ribbed belt tensioner assembly by turning it clockwise and counterclockwise.

      Tech Tips

      If a malfunction exists, replace the V-ribbed belt tensioner assembly.

    3. Install the V-ribbed belt Click here.

  8. INSPECT VALVE LASH ADJUSTER ASSEMBLY NOISE


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

    2. If unusual noises occur, warm up the engine and idle it for 30 minutes or more, then perform the inspection.

      Tech Tips

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

  9. 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 run it at idle.

      3. Turn the GTS on.

      4. Enter the following menus: Powertrain / Engine / Data List / Ignition Timing Cylinder #1.

        Standard Ignition Timing
        5 to 15° BTDC at idle

        Note


        • Check the ignition timing with the cooling fans off.

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

        • When checking the ignition timing, the transaxle should be in neutral or park.

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

      6. Enter the following menus: Powertrain / Engine / Active Test / Activate the TC Terminal / ON.

      7. Monitor Ignition Timing Cylinder #1.

      8. Perform the Active Test.

        Standard Ignition Timing
        8 to 12° BTDC at idle

        Note


        • Check the ignition timing with the cooling fans off.

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

        • When checking the ignition timing, the transaxle should be in neutral or park.

    3. When not using the GTS:


      1. A01W23XE57
        Text in Illustration
        *a 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 may damage electrical components.

        • Check the ignition timing with the cooling fans off.

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

        • When checking the ignition timing, the transaxle should be in neutral or park.

      2. Remove the No. 1 engine cover sub-assembly Click here.

      3. A01W5G6

        Connect the clip of a timing light to the ignition coil wire for the No. 1 cylinder.

        Note

        Use a timing light that detects primary signals.

      4. Start the engine and run it at idle.

      5. Check the ignition timing at idle.

        Standard Ignition Timing
        8 to 12° BTDC at idle

        Note


        • Check the ignition timing with the cooling fans off.

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

        • When checking the ignition timing, the transaxle should be in neutral or park.

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

      7. Check the ignition timing at idle.

        Standard Ignition Timing
        5 to 15° BTDC at idle

        Note


        • Check the ignition timing with the cooling fans off.

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

        • When checking the ignition timing, the transaxle should be in neutral or park.

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

      9. Disconnect the clip of the timing light from the ignition coil wire for the No. 1 cylinder.

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

  10. INSPECT ENGINE IDLE SPEED


    1. Warm up and stop the engine.

    2. When using the GTS:


      1. Connect the GTS to the DLC3.

      2. Start the engine and run it at idle.

      3. Turn the GTS on.

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

      5. Read the value displayed on the tester.

        Standard Idle Speed
        600 to 700 rpm

        Note


        • Check the engine idle speed with the cooling fans off.

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

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

    3. When not using the GTS:


      1. A01W23XE58
        Text in Illustration
        *a DLC3

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

        SST
        09843-18030

        Note

        Be sure to connect the tachometer probe to the correct terminal. Connecting the wrong terminals can cause damage to electrical components.

      2. Start the engine and run it at idle.

      3. Inspect the engine idle speed.

        Standard Idle Speed
        600 to 700 rpm

        Note


        • Check the engine idle speed with the cooling fans off.

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

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

      4. Turn the engine switch off.

      5. Disconnect the tachometer probe from terminal 9 (TAC) of the DLC3.

  11. INSPECT COMPRESSION

    Note

    Keep the spark plug holes free of foreign matter when measuring the compression pressure.


    1. Warm up and stop the engine.

    2. Check for DTCs Click here.

    3. Remove the 4 spark plugs Click here.

    4. Remove the air cleaner cap with air cleaner hose Click here.

    5. Remove the air cleaner case sub-assembly Click here.

    6. A01W3EL

      Disconnect the fuel injector connector (for Port Injection).

    7. A01W1BV

      Disconnect the fuel injector connector (for Direct Injection).

    8. Install the air cleaner case sub-assembly Click here.

    9. Install the air cleaner cap with air cleaner hose Click here.

    10. A01W4N0

      Check 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
        1400 kPa (14.3 kgf/cm2, 203 psi)
        Minimum Compression Pressure
        980 kPa (10.0 kgf/cm2, 142 psi)
        Pressure Difference between Each Cylinder
        100 kPa (1.0 kgf/cm2, 15 psi) or less

        Note


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

        • Inspect the other cylinders in the same way.

        • Measure the compression pressure as quickly as possible.

    11. If the cylinder compression pressure is low, pour a small amount of engine oil into the cylinder through the spark plug hole and inspect it again.

      Tech Tips


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

      • If the compression pressure stays low, a valve may be stuck or seated improperly, or there may be leaks in the cylinder head gasket.

    12. Remove the air cleaner cap with air cleaner hose.

    13. Remove the air cleaner case sub-assembly.

    14. Connect the fuel injector connector (for Direct Injection).

    15. Connect the fuel injector connector (for Port Injection).

    16. Install the air cleaner case sub-assembly Click here.

    17. Install the air cleaner cap with air cleaner hose Click here.

    18. Install the 4 spark plugs Click here.

    19. Clear the DTCs Click here.

      Note

      After the inspection, clear the DTCs, check for DTCs again and make sure the normal system code is output.

  12. INSPECT CO/HC

    Tech Tips

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


    1. Start the engine.

    2. Run the engine at 2500 rpm for approximately 180 seconds.

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

    4. Immediately check the CO/HC concentration during idle and when the engine is running at 2500 rpm.

      Tech Tips

      When performing a 2 mode (with the engine idling/running at 2500 rpm) test, the measurement procedures are determined by applicable local regulations. If the CO/HC concentration does not comply with the regulations, perform troubleshooting in the order given below.


      1. Check for DTCs Click here.

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

        CO HC Problem Cause
        Normal High Rough idle

        1. Faulty ignition:


          • Incorrect valve timing

          • Fouled, shorted or improperly gapped spark plugs

        2. Incorrect valve clearance (valve lash adjuster assembly)

        3. Leaks in intake or exhaust valves

        4. Leaks in cylinders

        5. Faulty EGR
        Low High

        Rough idle

        (Fluctuating HC reading)

        1. Vacuum leaks:


          • PCV hoses

          • Intake manifold

          • Throttle with motor body assembly

          • Brake booster line

        2. Lean mixture causing misfire

        3. Faulty EGR
        High High Rough idle (Black smoke from exhaust)

        1. Restricted air cleaner filter element sub-assembly

        2. Plugged PCV valve

        3. Faulty SFI system:


          • Fuel pressure regulator assembly

          • Engine coolant temperature sensor

          • Mass air flow meter sub-assembly

          • ECM

          • Fuel injector assemblies

          • Throttle position sensor (built into throttle with motor body assembly)

        4. Faulty EGR