ENGINE ON-VEHICLE INSPECTION

PROCEDURE


  1. INSPECT ENGINE COOLANT

    Click here

  2. INSPECT ENGINE OIL

    Click here

  3. INSPECT BATTERY

    Click here

  4. INSPECT AIR CLEANER FILTER ELEMENT SUB-ASSEMBLY


    1. Remove the air cleaner cap sub-assembly.

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

    3. Visually check that the air filter sub-assembly is not excessively damaged or oily.

      If necessary, replace the air cleaner filter element sub-assembly.

    4. Reinstall the air cleaner filter element sub-assembly to the air cleaner case.

    5. Reinstall the air cleaner cap sub-assembly.

  5. INSPECT SPARK PLUG

    Click here

  6. INSPECT FAN AND GENERATOR V BELT

    Click here

  7. INSPECT V-RIBBED BELT TENSIONER ASSEMBLY

    Click here

  8. INSPECT VALVE LASH ADJUSTER NOISE


    1. Rev 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 preceding inspection.

      Tech Tips

      If any defects or problems are found during the preceding 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 idle it.

      3. Turn the GTS on.

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

        Standard ignition timing
        5 to 15° BTDC @ idle

        Tech Tips

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

        Note


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

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

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

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

      7. Monitor IGN Advance.

      8. Perform the Active Test.

        Standard ignition timing
        3 to 7° BTDC @ idle

        Note

        When checking the ignition timing, the transmission should be in N or P.

        Tech Tips

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

    3. When not using the GTS:


      1. Loosen the hose clamp from the throttle body side.

      2. Remove the 3 bolts and disconnect the intake air connector.

        Tech Tips

        Move the intake air connector so that the tester probe of a timing light can be connected to the wire of the ignition coil for the No. 1 cylinder.

      3. 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.

      4. Connect the intake air connector.

        Tech Tips

        Return the parts to their original positions so that the engine can be started.

      5. Start the engine and idle it.

      6. A01XJRVE46
        Text in Illustration
        *a Front view of 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 can damage the engine.

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

      7. Using the timing light, check the ignition timing.

        Standard ignition timing
        3 to 7° BTDC @ idle

        Note


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

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

      8. Remove SST from the DLC3.

      9. Check the ignition timing.

        Standard ignition timing
        5 to 15° BTDC @ idle

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

      11. Turn the ignition switch off.

      12. Disconnect the timing light from the engine.

      13. Connect the intake air connector with the 3 bolts.

        Torque:
        8.0 N*m  { 82 kgf*cm, 71 in.*lbf }

      14. Tighten the hose clamp.

        Torque:
        5.0 N*m  { 51 kgf*cm, 44 in.*lbf }

  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 idle it.

      3. Turn the GTS on.

      4. Enter the following menus: Powertrain / Engine and ECT / Data List / Engine Speed.

        Standard idle speed
        600 to 700 rpm

        Note


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

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

        Tech Tips

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

      5. Turn the ignition switch off.

      6. Disconnect the GTS from the DLC3.

    3. A01XJRVE47
      Text in Illustration
      *a Front view of DLC3

      When not using the GTS:


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

        SST
        09843-18040

        Note


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

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

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

      2. Check the idle speed.

        Standard idle speed
        600 to 700 rpm

      3. Disconnect the tachometer probe from the DLC3.

    4. If the engine speed is not as specified, update the idle speed control (ISC) learned value using either procedure 1 or procedure 2 below, and then check the engine speed again.


      1. Procedure 1:

        After completely warming up the engine, drive the vehicle at 30 km/h (19 mph) for 30 seconds or more and idle the engine for 30 seconds or more. Repeat this pattern 5 times or more.

        A01XFV9E01
        Text in Illustration
        *a Engine completely warmed up *b Vehicle being driven at 30 km/h (19 mph)
        *c Idling *d 1 time

      2. Procedure 2:

        After completely warming up the engine, stop the engine and then idle it. Repeat this pattern 5 times or more.

        A01XH0CE01
        Text in Illustration
        *a Engine completely warmed up *b Engine stopped
        *c Engine started *d Idling
        *e 1 time - -

        Tech Tips


        • Be sure to idle the engine for 150 seconds or more for each time the pattern is repeated.

        • If the engine speed is not as specified after performing the procedure above, inspect the idle speed control system as it is malfunctioning.

  11. INSPECT COMPRESSION


    1. Warm up and stop the engine.

    2. Check for DTCs Click here.

    3. Disconnect the 4 fuel injector connectors.

    4. Remove the 4 spark plugs Click here.

    5. Inspect the cylinder compression pressure.


      1. Fully open the throttle.

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

        Standard compression pressure
        1230 kPa (12.5 kgf/cm2, 178 psi) or higher
        Minimum pressure
        880 kPa (9.0 kgf/cm2, 128 psi)
        Difference between each cylinder
        98 kPa (1.0 kgf/cm2, 14.2 psi) or less

        Note


        • Use a fully-charged battery so the engine speed can be increased to 250 rpm or more.

        • Inspect the other cylinders in the same way.

        • Measure the compression in as short a time as possible.

        Tech Tips

        If the cylinder compression is low, pour a small amount of engine oil into the cylinder through the spark plug hole and inspect it again.


        • If adding oil increases the compression pressure, the piston rings and/or cylinder bore may be worn or damaged.

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

    6. Install the 4 spark plugs Click here.

    7. Connect the 4 fuel injector connectors.

    8. Clear the DTCs Click here.

  12. INSPECT CO/HC


    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 while idling the engine.

    4. Check the CO/HC concentration during idling and when the engine is running at 2500 rpm.

      Tech Tips

      When doing the 2 mode (with the engine idling/ running at 2500 rpm) test, the measuring procedures are determined by 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 (See page ) and heated oxygen sensor Click here.

      2. Refer to the table below for possible causes, and then inspect the applicable parts and repair them if necessary.

        CO HC Problems Possible Causes
        Normal High Rough idling

        1. Faulty ignition:


          • Incorrect timing

          • Plugs are contaminated or shorted, or gaps are incorrect

        2. Incorrect valve clearance (valve lash adjuster assembly)

        3. Leakage from intake or exhaust valves

        4. Leakage from cylinders
        Low High

        Rough idling

        (Fluctuating HC reading)

        1. Vacuum leaks:


          • PCV hoses

          • Intake manifold

          • Throttle body with motor assembly

          • Brake booster line

        2. Lean mixture causing misfire
        High High

        Rough idling

        (Black smoke from exhaust)

        1. Restricted air cleaner filter element sub-assembly

        2. Plugged PCV valve sub-assembly

        3. Faulty SFI system:


          • Faulty fuel pressure regulator assembly

          • Faulty engine coolant temperature sensor

          • Faulty mass air flow meter sub-assembly

          • Faulty ECM

          • Faulty fuel injector assemblies

          • Faulty throttle body with motor assembly