ENGINE ON-VEHICLE INSPECTION

PROCEDURE

  1. INSPECT ENGINE COOLANT

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  2. INSPECT ENGINE OIL

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  3. INSPECT BATTERY

    Click hereClick 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.

      Tip:

      • 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

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  7. INSPECT VALVE AND 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.

      Tip:

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

      Click here

  8. INSPECT IGNITION TIMING

    1. Warm up and stop the engine.

    2. When using the GTS:

      Check the ignition timing.

      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

        0 to 14 degrees BTDC

        Note:

        • Check the ignition timing with the cooling fan off.

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

        • 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

        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 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. A122830C06

        *a

        DLC3

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

        09843-18040

        Note:

        • Confirm the terminals before connecting them. Connecting the wrong terminals may result in damage to electrical components.

        • Check the ignition timing with the cooling fan 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. 2 cylinder head cover.

      3. A203506

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

        Note:

        Use a timing light that detects primary signals.

      4. Check 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.

        Tip:

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

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

      6. Check the ignition timing at idle.

        Standard Ignition Timing

        0 to 14 degrees BTDC

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

      8. Disconnect the clip of the timing light from the engine.

      9. Install the No. 2 cylinder head cover.

  9. INSPECT ENGINE IDLE SPEED

    1. Warm up and stop the engine.

    2. When using the GTS:

      1. Connect the GTS to the DLC3.

      2. Turn the ignition switch to ON.

      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 off all the electrical systems and the A/C.

        • Check the idle speed with the cooling fan off.

        • When checking the engine 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. A124242C09

        *a

        DLC3

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

        Note:

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

        09843-18040

      2. Turn the ignition switch to ON.

      3. Inspect the engine idle speed.

        Standard Idle Speed

        600 to 700 rpm

        Note:

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

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

        • When checking the engine 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.

  10. 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. A156613

      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 Compression Pressure

        1373 kPa (14.0 kgf/cm2, 199 psi)

        Minimum Compression Pressure

        1079 kPa (11.0 kgf/cm2, 157 psi)

        Pressure Difference between each Cylinder

        98 kPa (1.0 kgf/cm2, 14.2 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.

      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.

        Tip:

        • 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.

    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.

  11. INSPECT CO/HC

    Tip:

    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 (1.3 ft.) into the tailpipe during idle.

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

      Tip:

      When doing 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, troubleshoot 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

        3. Incorrect valve clearance

        4. Leaks in intake or exhaust valves

        5. Leaks in cylinders

        Low

        High

        Rough idle (Fluctuating HC reading)

        1. Vacuum leaks:

          • PCV hoses

          • Intake manifold

          • Throttle body

          • Brake booster line

        3. 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 systems:

          • Fuel pressure regulator assembly

          • Engine coolant temperature sensor

          • Mass air flow meter sub-assembly

          • ECM

          • Fuel Injector assemblies

          • Throttle body assembly