ENGINE ON-VEHICLE INSPECTION

CAUTION / NOTICE / HINT

Tip:

The type of ignition switch used on this model differs according to the specifications of the vehicle. For the expressions listed in this section, refer to the "Ignition Switch Expressions" precaution.

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PROCEDURE

  1. INSPECT ENGINE COOLANT

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  2. INSPECT ENGINE OIL

    Click here

  3. INSPECT BATTERY

    Click hereClick here

  4. INSPECT AIR CLEANER FILTER ELEMENT SUB-ASSEMBLY

    1. Remove the air cleaner cap.

    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 element sub-assembly.

  5. INSPECT SPARK PLUG

    Click here

  6. INSPECT FAN AND GENERATOR V BELT

    Click here

  7. INSPECT VALVE LASH ADJUSTER ASSEMBLY 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 over 30 minutes. Then perform the inspection above again.

      If any defects or problems are found during the inspection above, perform a lash adjuster inspection.

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  8. 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 idle it.

      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 15° BTDC @ idle

        Note:

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

        • Check the ignition timing with the cooling fan off.

        • When checking the ignition timing, the shift lever should be in N or P.

        Tip:

        Refer to the GTS operator's manual for further details.

        If the ignition timing is not as specified, check the valve timing.

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

        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 BTDC @ idle

        Note:

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

        • Check the ignition timing with the cooling fan off.

        • When checking the ignition timing, the shift lever should be in N or P.

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

      8. Turn the ignition switch off.

      9. Disconnect the GTS from the DLC3.

    3. When not using the GTS:

      1. Connect the tester probe of a timing light to the wire of the ignition coil connector for the No. 1 cylinder.

        Note:

        Use a timing light that detects primary signals.

      2. Start the engine and idle it.

      3. A206183C25

        *a

        Front view of DLC3

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

        09843-18040

        Note:

        • Confirm the terminal numbers before connecting them. Connecting the wrong terminals can damage the engine.

        • When checking the ignition timing, the shift lever should be in N or P.

      4. Using a timing light, check the ignition timing.

        Standard ignition timing

        8 to 12° BTDC @ idle

        Note:

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

        • Check the ignition timing with the cooling fan off.

        • When checking the ignition timing, the shift lever should be in N or P.

      5. Remove SST from the DLC3.

      6. Check the ignition timing.

        Standard ignition timing

        5 to 15° BTDC @ idle

        Note:

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

        • Check the ignition timing with the cooling fan off.

        • When checking the ignition timing, the shift lever should be in N or P.

        If the ignition timing is not as specified, check the valve timing.

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

      8. Turn the ignition switch off.

      9. Disconnect the timing light from the engine.

  9. INSPECT ENGINE IDLE SPEED

    1. Warm up and stop the engine.

    2. When using the GTS:

      1. Connect the GTS to the DLC3.

        Tip:

        Switch off all accessories and the A/C before connecting the GTS.

      2. Race the engine at 2500 rpm for approximately 90 seconds.

      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

        Standard idle speed

        720 to 820 rpm

        Note:

        When checking the idle speed, the shift lever should be in N or P.

        Tip:

        Refer to the GTS operator's manual for further details.

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

      5. Disconnect the GTS from the DLC3.

    3. When not using the GTS:

      1. A206183C26

        *a

        Front view of DLC3

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

        09843-18030

        Note:

        Confirm the terminal number before connecting the probe. Connecting the wrong terminals can damage the engine.

        Tip:

        Switch off all accessories and the A/C.

      2. Race the engine at 2500 rpm for approximately 90 seconds.

      3. Check the idle speed.

        Standard idle speed

        720 to 820 rpm

        Note:

        When checking the idle speed, the shift lever should be in N or P.

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

      4. Disconnect the tachometer probe from the DLC3.

  10. INSPECT COMPRESSION

    1. Warm up and stop the engine.

    2. Check for DTCs.

    3. Remove the 4 spark plugs.

      Click here

    4. Disconnect the 4 fuel injector connectors.

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

    6. Fully open the throttle.

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

      Standard compression pressure

      1450 kPa (14.8 kgf/cm2, 210 psi) or higher

      Minimum pressure

      980 kPa (10.0 kgf/cm2, 142 psi)

      Difference between each cylinder

      200 kPa (2.0 kgf/cm2, 29 psi) or less

      Tip:

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

    8. If the cylinder compression is low in one or more cylinders, pour a small amount of engine oil into the cylinder with low compression through its spark plug hole. Then inspect the cylinder compression pressure again.

      Tip:

      • If adding oil helps boost the compression, it is likely that the piston rings and/or cylinder bore is worn or damaged.

      • If the pressure stays low, a valve may be stuck or seated improperly, or there may be leakage from the gasket.

    9. Connect the 4 fuel injector connectors.

    10. Install the 4 spark plugs.

      Click here

    11. Clear the DTCs.

  11. INSPECT CO/HC

    Tip:

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

    1. Start the engine.

    2. Keep 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 idling.

    4. Immediately check the CO/HC concentration at idle and at 2500 rpm.

      Tip:

      • When performing the 2-mode (2500 rpm and idle) test, follow the measurement order prescribed by the applicable local regulations.

      • If the CO/HC concentration does not comply with regulations, troubleshoot in the order given below.

      1. Check the air fuel ratio sensor operation.

        Click here

      2. Check the heated oxygen sensor operation.

        Click here

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

        CO

        HC

        Symptom

        Causes

        Normal

        High

        Rough idle

        • 1. Faulty ignition

          • Incorrect timing

          • Plugs are contaminated or shorted, or gaps are defective

        • 2. Leaky intake and exhaust valves

        • 3. Leaky cylinder

        Low

        High

        Rough idle

        (Fluctuating HC reading)

        • 1. Vacuum leaks

          • PCV hose

          • Intake manifold

          • Throttle body

          • Brake booster line

        • 2. Lean mixture causing misfire

        High

        High

        Rough idle

        (Black smoke from exhaust)

        • 1. Restricted air filter

        • 2. Faulty SFI system

          • Faulty pressure

          • Defective engine coolant temperature sensor

          • Faulty ECM

          • Faulty injector

          • Faulty throttle position sensor

          • Faulty mass air flow meter sensor