ENGINE ON-VEHICLE INSPECTION

CAUTION / NOTICE / HINT

CAUTION:


  • A005QA2

    When working near the engine room while the engine has started or the power source mode is ignition switch to ON (IG), do not touch the fan and generator V belt or rotating components such as the fan, etc.

  • Touching the fan and generator V belt or rotating components such as the fan, etc. could result in your hand or clothing getting caught and pulled in.

PROCEDURE


  1. INSPECT ENGINE COOLANT

    Click here

  2. INSPECT ENGINE OIL

    Click here

  3. INSPECT BATTERY CONDITION

    Click here

  4. INSPECT SPARK PLUG

    Click here

  5. INSPECT AIR CLEANER FILTER ELEMENT SUB-ASSEMBLY

    Click here

  6. INSPECT FAN AND GENERATOR V BELT

    Click here

  7. INSPECT V-RIBBED BELT TENSIONER ASSEMBLY


    1. Remove the fan and generator V belt.

      Click here

    2. Turn the V-ribbed belt tensioner assembly clockwise and counterclockwise and check that it turns smoothly and does not catch.

      Tech Tips

      If the V-ribbed belt tensioner assembly does not turn smoothly or catches, replace the V-ribbed belt tensioner assembly.

    3. Install the fan and generator V 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 and ECT / Data List / IGN Advance.


        Powertrain > Engine and ECT > Data List
        Tester Display
        IGN Advance
        Standard Ignition Timing
        -5 to 25° BTDC at idle

        Note


        • Check the ignition timing with the cooling fans off.

        • Turn off all electrical systems and the A/C (w/ Air conditioning system).

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

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


        Powertrain > Engine > Active Test
        Active Test Display
        Connect the TC and TE1
        Data List Display
        IGN Advance

      6. Monitor IGN Advance of the Data List.

        Standard Ignition Timing
        8 to 12° BTDC at idle

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

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

    3. When not using the GTS:


      1. A001U66C10
        *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 (w/ Air conditioning system).

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

      2. A001VYT

        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.

      3. Start the engine and run it at idle.

      4. A001U7BC01
        *a TDC
        *b 10° BTDC
        *c Cutout

        Check the ignition timing at idle.

        Standard Ignition Timing
        8 to 12° BTDC at idle

        Tech Tips

        If the cutout of the crankshaft pulley assembly is at a position between the protrusion (10° BTDC) of the timing chain cover assembly and TDC, the ignition timing meets the standard.

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

      6. Check the ignition timing at idle.

        Standard Ignition Timing
        -5 to 25° BTDC at idle

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

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

  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 and ECT / Data List / Engine Speed.


        Powertrain > Engine and ECT > Data List
        Tester Display
        Engine Speed

      5. Read the value displayed on the tester.

        Standard Idle Speed
        for Manual Transaxle
        600 to 700 rpm
        for CVT
        680 to 780 rpm

        Note


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

        • Turn off all electrical systems and the A/C (w/ Air conditioning system).

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

    3. When not using the GTS:


      1. A001U66C91
        *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
        for Manual Transaxle
        600 to 700 rpm
        for CVT
        680 to 780 rpm

        Note


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

        • Turn off all electrical systems and the A/C (w/ Air conditioning system).

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

      4. 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 outer cowl top panel.

      for LHD: Click here

      for RHD: Click here

    4. Remove the 4 spark plugs.

      Click here

    5. A001VFX

      Disconnect the engine wire connector as shown in the illustration.

      Note

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

    6. Check the cylinder compression pressure.


      1. A001VW8

        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
        1080 kPa (11.0 kgf/cm2, 157 psi)
        Minimum Compression Pressure
        880 kPa (9.0 kgf/cm2, 128 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 all cylinders in the same way.

        • Measure the compression pressure as quickly 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 and inspect it again.

        Tech Tips


        • If adding 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.

    7. Connect the engine wire connector.

    8. Install the 4 spark plugs.

      Click here

    9. Install the outer cowl top panel.

      for LHD: Click here

      for RHD: Click here

    10. 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
        Low High Rough idle (Fluctuating HC reading)

        1. Vacuum leaks:


          • PCV hoses

          • Intake manifold

          • Throttle body with motor assembly

        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 systems:


          • Fuel pressure regulator assembly

          • Engine coolant temperature sensor

          • Mass air flow meter

          • ECM

          • Fuel injector assemblies

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