ENGINE ON-VEHICLE INSPECTION


  1. INSPECT COOLANT (for Engine)


    1. Inspect the coolant.

      Tech Tips

      Click here.

  2. INSPECT ENGINE OIL


    1. Inspect the engine oil.

      Tech Tips

      Click here.

  3. INSPECT AUXILIARY BATTERY


    1. Inspect the auxiliary battery.

      Tech Tips

      Click here.

  4. INSPECT AIR CLEANER FILTER ELEMENT SUB-ASSEMBLY


    1. Remove the engine room side cover LH Click here.

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

    3. Visually check that the air cleaner filter is not excessively damaged or oily. If necessary, replace the air cleaner filter.

      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.

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

    5. Install the engine room side cover LH Click here.

  5. INSPECT V-RIBBED BELT


    1. Inspect the V-ribbed belt.

      Tech Tips

      Click here.

  6. INSPECT V-RIBBED BELT TENSIONER ASSEMBLY


    1. Remove the V-ribbed belt Click here.

    2. Check that nothing is caught in the tensioner by turning it clockwise and counterclockwise. If a malfunction exists, replace the tensioner.

    3. Install the V-ribbed belt Click here.

  7. INSPECT VALVE LASH ADJUSTER NOISE


    1. Put the engine in inspection mode Click here.

    2. 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 preceding inspection.

      Tech Tips

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

  8. INSPECT IGNITION TIMING


    1. Put the engine in inspection mode Click here.

    2. Warm up and stop the engine.

      Tech Tips

      A warmed up engine should have an engine coolant temperature of over 80°C (176°F), an engine oil temperature of 60°C (140°F), and the engine speed should be stabilized.

    3. Put the engine in inspection mode Click here.

    4. When using the intelligent tester:

      Check the ignition timing.


      1. Connect the intelligent tester to the DLC3.

      2. Start the engine and run it at idle.

      3. Turn the intelligent tester on.

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

        Standard ignition timing
        0 to 20° BTDC at idle

        Note


        • Check the ignition timing with the cooling fans off.

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

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

        Tech Tips

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

      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.

      7. Monitor IGN Advance of the Data List.

      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 the electrical systems and the A/C.

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

        Tech Tips

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

    5. When not using the intelligent tester:


      1. A01NHGRE14

        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.

        • Check the ignition timing with the cooling fans off.

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

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

      2. Remove the engine room side cover Click here.

      3. Remove the engine room side cover LH Click here.

      4. Remove the cool air intake duct seal Click here.

      5. Remove the V-bank cover sub-assembly Click here.

      6. Connect the timing light tester probe to the ignition coil wire for No. 1 cylinder.

        Note

        Use a timing light that detects the primary signal.

      7. Check the ignition timing at idle.

        Standard ignition timing
        8 to 12° BTDC at idle

        Note

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

        Tech Tips

        Run the engine at 1000 to 1300 rpm for 5 seconds, and then check that the engine rpm returns to idle speed.

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

      9. Check the ignition timing at idle.

        Standard ignition timing
        0 to 20° BTDC at idle

      10. Confirm that the ignition timing advances immediately when the engine rpm is increased.

      11. Remove the timing light from the engine.

      12. Install the V-bank cover sub-assembly Click here.

      13. Install the cool air intake duct seal Click here.

      14. Install the engine room side cover LH Click here.

      15. Install the engine room side cover Click here.

  9. INSPECT ENGINE IDLE SPEED


    1. Put the engine in inspection mode Click here.

    2. Warm up and stop the engine.

      Tech Tips

      A warmed up engine should have an engine coolant temperature of over 80°C (176°F), an engine oil temperature of 60°C (140°F), and the engine speed should be stabilized.

    3. Put the engine in inspection mode Click here.

    4. Check the idle speed.

    5. Connect the intelligent tester to the DLC3.

    6. Start the engine and run it at idle.

    7. Turn the intelligent tester on.

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

    9. Read the value displayed on the tester.

      Standard Idle Speed
      Measurement Condition Idle Speed
      Park Position 850 to 950 rpm
      Neutral Position 1250 to 1350 rpm

      Note


      • Check the idle speed with the cooling fans off.

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

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

      Tech Tips


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

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

  10. INSPECT COMPRESSION


    1. Put the engine in inspection mode Click here.

    2. Warm up and stop the engine.

      Tech Tips

      A warmed up engine should have an engine coolant temperature of over 80°C (176°F), an engine oil temperature of 60°C (140°F), and the engine speed should be stabilized.

    3. Remove the 6 spark plugs Click here.

    4. A01NH8V

      Check the cylinder compression pressure.


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

      2. Connect the intelligent tester to the DLC3.

      3. Turn the intelligent tester on.

      4. Enter the following menus: Powertrain / Hybrid Control / Active Test / Compress Test / On.

      5. Fully depress the acceleration pedal.

      6. Depress and hold the brake pedal, and turn the power switch on (READY). Then check the compression pressure.

        Standard compression pressure
        1.0 MPa (10.2 kgf/cm2, 145 psi)
        Minimum pressure
        0.75 MPa (7.7 kgf/cm2, 109 psi)
        Difference between each cylinder
        0.1 MPa (1.0 kgf/cm2, 15 psi)

        Note


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

        • Check the compression pressure of the other cylinders in the same way.

        • This measurement must be done as quickly as possible.

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

    5. Install the 6 spark plugs Click here.

      Note

      After performing all the procedures, be sure to clear DTCs stored in the the memory. Then, check that the normal system code is output.

  11. INSPECT CO/HC

    Tech Tips

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


    1. Put the engine in inspection mode Click here.

    2. Start the engine.

    3. Keep the engine speed at 2500 rpm for approximately 180 seconds.

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

    5. Immediately check CO/HC concentration during idle and when running at 2500 rpm.

      Tech Tips

      When performing the 2 mode (with the engine idling/running at 2500 rpm) test, follow the measurement order 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 the DTCs Click here.

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

        CO HC Problem Cause
        Normal High Rough idle

        1. Faulty ignitions:


          • Incorrect valve timing

          • Fouled, shorted or improperly gapped plugs

        2. Incorrect valve clearance (valve lash adjuster)

        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 assembly

          • Brake booster line

        2. Lean mixture causing misfire
        High High

        Rough idle

        (Black smoke from exhaust)

        1. Restricted air cleaner filter element sub-assembly

        2. Plugged PCV valve

        3. Faulty SFI system:


          • Faulty fuel pressure regulator

          • Defective engine coolant temperature sensor

          • Defective mass air flow meter

          • Faulty ECM

          • Faulty injector assemblies

          • Faulty throttle position sensor (built in throttle body assembly)