ENGINE ON-VEHICLE INSPECTION

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 sub-assembly.

      Click here

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

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

      • If any foreign matter or clogs remain even after cleaning the air cleaner filter element sub-assembly with compressed air, replace it.

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

    5. Install the air cleaner cap sub-assembly.

      Click here

  5. INSPECT SPARK PLUG

    Click here

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

    3. Install the V-ribbed belt.

      Click here

  8. 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 30 minutes or more, then perform the preceding inspections.

      Tech Tips

      If any defects or problems are found during the preceding inspections, perform valve lash adjuster 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 and ECT / Data List / IGN Advance.


        Powertrain > Engine and ECT > Data List
        Tester Display
        IGN Advance
        Standard ignition timing
        -10 to 10 degrees BTDC

        Note


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

        • Check the ignition timing with the cooling fans off.

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

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


        Powertrain > Engine and ECT > Active Test
        Tester Display
        Connect the TC and TE1
      6. Monitor IGN Advance of the Data List.

        Standard ignition timing
        8 to 12 degrees BTDC

        Note

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

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

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

      9. Turn the ignition switch off.

      10. Disconnect the GTS from the DLC3.

    3. When not using the GTS:


      1. A01TD29C10
        *a DLC3

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

        SST
        09843-18040

        Note


        • Be sure to connect the terminals correctly. Failure to do so can damage the engine.

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

        • Check the ignition timing with the cooling fans off.

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

      2. Remove the No. 1 engine cover.

        Click here

      3. A01TAFX

        Pull out the wire harness shown in the illustration.

        Note

        After checking, wrap the wire harness with tape.

      4. Connect the clip of the timing light to the wire harness.

        Note

        Use a timing light that detects the primary signal.

      5. A01TC3RC01
        *a TDC
        *b 8 to 12 degrees BTDC

        Inspect the ignition timing at idle.

        Standard ignition timing
        8 to 12 degrees BTDC

        Note

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

        Tech Tips


        • If the cutout of the crankshaft pulley is positioned within the range*b of the timing chain cover sub-assembly, the ignition timing is within the specified range.

        • After running the engine at 1000 to 1300 rpm for 5 seconds, check that it returns to idle speed.

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

      7. Inspect the ignition timing at idle.

        Standard ignition timing
        -10 to 10 degrees BTDC
      8. Check that the ignition timing advances immediately when the engine speed is increased.

      9. Remove the timing light.

      10. Install the No. 1 engine cover.

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


        Powertrain > Engine and ECT > Data List
        Tester Display
        Engine Speed
      4. Inspect the engine 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 or park.

      5. Turn the ignition switch off.

      6. Disconnect the GTS from the DLC3.

    3. When not using the GTS:


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

        Note

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

        SST
        09843-18040
      2. Turn the ignition switch to ON.

      3. Inspect the engine 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 or park.

      4. Turn the ignition switch off.

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

  11. INSPECT COMPRESSION

    Note

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


    1. Check for DTCs.

      Click here

    2. Warm up and stop the engine.

    3. Remove the 4 spark plugs.

      Click here

    4. Disconnect the 4 fuel injector connectors.

      Note

      Disable fuel injection in order to prevent catalyst damage due to unburned gasoline.

    5. A01TCSC

      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 pressure
        1200 kPa (12.2 kgf/cm2,174 psi)
        Minimum pressure
        900 kPa (9.2 kgf/cm2, 131psi)
        Difference between each cylinder
        98 kPa (1.0 kgf/cm2, 14.2 psi) or less

        Note


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

        • Inspect the other cylinders in the same way.

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

      4. If the cylinder compression pressure is low, pour a small amount of engine oil into the cylinder through the spark plug hole, then 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 leakage from the cylinder head gasket.

    6. Connect the 4 fuel injector connectors.

    7. Install the 4 spark plugs.

      Click here

    8. 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 local 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 (1.3 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 the 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 local 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 Possible Cause
        Normal High Rough idle
        1. Faulty ignition:


          • Incorrect timing

          • Fouled, shorted or improperly gapped plugs

        2. Incorrect valve clearance

        3. Leaks in intake or exhaust valves

        4. Leaks in cylinders

        Low High Rough idle (Fluctuating HC reading)
        1. Vacuum leaks:


          • PCV hoses

          • Intake manifold

          • Throttle body

          • Brake booster line

        2. Lean mixture causing misfire

        High High Rough idle (Black smoke from exhaust)
        1. Restricted air cleaner filter element

        2. Plugged PCV valve

        3. Faulty EFI system:


          • Pressure regulator

          • Engine coolant temperature sensor

          • Mass air flow meter

          • ECM

          • Injector assemblies

          • Throttle body assembly