ENGINE ON-VEHICLE INSPECTION

PROCEDURE


  1. INSPECT ENGINE COOLANT

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  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 damaged or excessively oily.

      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

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  7. INSPECT V-RIBBED BELT TENSIONER ASSEMBLY


    1. Remove the V-ribbed 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 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

    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.


    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.


        Powertrain > Engine > Data List
        Tester Display
        Ignition Timing Cylinder #1
        Standard Ignition Timing
        12 to 24° BTDC at idle

      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.


        Powertrain > Engine > Active Test
        Active Test Display
        Activate the TC Terminal
        Data List Display
        Ignition Timing Cylinder #1

      7. Monitor Ignition Timing cylinder #1 of the Data List.

        Standard Ignition Timing
        8 to 12° BTDC at idle

    3. When not using the GTS:


      1. B003ZLYC65
        *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.

      2. B003Z3R

        Disengage the 2 claws and open the cover.

      3. B00408Q

        Connect the clip of the 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. B003Z7BC01
        *a Cutout
        *b 10° BTDC
        *c TDC

        Check the ignition timing at idle.

        Standard Ignition Timing
        8 to 12° BTDC at idle

        Tech Tips


        • If the cutout of the crankshaft pulley is approximately aligned the protrusion (10° CA BTDC) of the timing chain cover assembly, the ignition timing meets the standard.

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

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

      7. Check the ignition timing at idle.

        Standard Ignition Timing
        12 to 24° BTDC at idle

      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. Close the cover and engage the 2 claws.

  10. INSPECT ENGINE IDLE SPEED

    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.


    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.


        Powertrain > Engine > Data List
        Tester Display
        Engine Speed

      5. Read the value displayed on the GTS.

        Standard Idle Speed
        650 to 750 rpm

    3. When not using the GTS:


      1. B003ZLYC66
        *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 to the wrong terminal may result in damage to electrical components.

      2. Start the engine and run it at idle.

      3. Check the idle speed.

        Standard Idle Speed
        650 to 750 rpm

      4. Turn the engine 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. Warm up and stop the engine.

    2. Check for DTCs.

      Click here

    3. Remove the 6 spark plugs.

      Click here

    4. B003ZWX

      Disconnect the 2 No. 5 engine wire connectors (for Port Injection).

      Note

      Perform this step in order to stop fuel injection to prevent damage to the catalyst due to unburned fuel.

    5. B00402W

      Disconnect the No. 6 engine wire connector and No. 7 engine wire connector (for Direct Injection).

      Note

      Perform this step in order to stop fuel injection to prevent damage to the catalyst due to unburned fuel.

    6. B003ZAA

      Check the cylinder compression pressure.


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

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

        Standard Compression Pressure
        1400 kPa (14.3 kgf/cm2, 203 psi)
        Minimum Compression Pressure
        1050 kPa (10.7 kgf/cm2, 152 psi)
        Pressure Difference between Each Cylinder
        200 kPa (2.0 kgf/cm2, 29 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.

      3. If the cylinder compression is low, pour a small amount of engine oil into the cylinder through the spark plug hole then inspect the cylinder compression pressure 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 No. 6 engine wire connector and No. 7 engine wire connector (for Direct Injection).

    8. Connect the 2 No. 5 engine wire connectors (for Port Injection).

    9. Install the 6 spark plugs.

      Click here

    10. Clear the DTCs.

      Click here

      Note

      After performing the inspection, clear the DTCs and confirm that DTCs are not stored again or that the normal system code is output if using a check wire.

  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 speed 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 at idle and then at an engine speed of 2500 rpm.

      Tech Tips

      When performing a 2 mode test (with the engine idling/running at 2500 rpm), 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 with motor 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:


          • 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)