ENGINE ON-VEHICLE INSPECTION


  1. INSPECT ENGINE COOLANT


    1. Inspect the engine coolant Click here.

  2. INSPECT ENGINE OIL


    1. Inspect the engine oil Click here.

  3. INSPECT BATTERY


    1. Inspect the battery Click here.

  4. INSPECT AIR CLEANER FILTER ELEMENT SUB-ASSEMBLY


    1. Remove the air cleaner cap.

    2. Remove the air filter element.

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

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

  5. INSPECT SPARK PLUG


    1. A00DTLCE29

      Check the electrode.


      1. Using a megohmmeter, measure the insulation resistance.

        Correct insulation resistance
        10 MΩ or higher

        If the result is not as specified, clean the plug and measure the resistance again.

        Tech Tips

        If a megohmmeter is not available, perform the following simple inspection instead.

    2. A00DS2TE01

      Alternative inspection method:


      1. Quickly accelerate the engine to 4000 rpm 5 times.

      2. Remove the spark plug.

      3. Visually check the spark plug.

        If the electrode is dry, the spark plug is functioning properly. If the electrode is damp, proceed to the next step.

    3. Check the spark plug for any damage on its thread and insulator.

      If there is damage, replace the spark plug.

      Recommended Spark Plug
      Manufacturer Spark Plug Type
      DENSO K20R-U11
      NGK BKR6EYA-11
    4. A00DQM8E01

      Clean the spark plugs.

    5. A00DQ6GE04

      Check the spark plug electrode gap.

      Maximum electrode gap for used spark plug
      1.4 mm (0.0551 in.)

      If the gap is more than the maximum, replace the spark plug.

      Electrode gap for new spark plug
      1.0 to 1.1 mm (0.0394 to 0.0433 in.)

  6. INSPECT FAN AND GENERATOR V BELT


    1. A00DPUUE01

      Check the belt for wear, cracks or other signs of damage.

      If any of the following defects is found, replace the fan and generator V belt.


      • The belt is cracked.


      • The belt is worn out to the extent that the cords are exposed.


      • The belt has chunks missing from the ribs.

    2. A00DSVTE01

      Check that the belt fits properly in the ribbed grooves.

      Tech Tips

      Check with your hand to confirm that the belt has not slipped out of the grooves on the bottom of the pulley. If it has slipped out, replace the fan and generator V belt. Install a new fan and generator V belt correctly.

  7. INSPECT IGNITION TIMING

    Note


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

    • Inspect the ignition timing with the cooling fan off.

    • When checking the ignition timing, move the shift lever to N.


    1. Warm up and stop the engine.

    2. When using the intelligent tester:


      1. Connect the intelligent tester to the DLC3.

      2. Allow the engine to idle.

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

      4. Read IGN Advance to check the ignition timing.

        Standard ignition timing
        5 to 15° BTDC @ idle

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

      6. Turn the engine switch off.

      7. Disconnect the intelligent tester from the DLC3.

    3. When not using intelligent tester:


      1. Remove the No. 1 engine cover Click here.

      2. A00DQ1P

        Open the ignition cover located to the right of the No. 4 ignition coil.

      3. Pull out the wire harness from the IG cover.

      4. Connect a timing light to the wire harness.

        Note

        Use a timing light that detects primary signals.

      5. A00DRDYE01
        Text in Illustration
        *1 Front view of DLC3:

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

        SST
        09843-18040

      6. Allow the engine to idle and check the ignition timing.

        Standard ignition timing
        8 to 12° BTDC @ idle

        Tech Tips

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

      7. Remove SST from the DLC3.

      8. Allow the engine to idle and check the ignition timing.

        Standard ignition timing
        5 to 15° BTDC

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

      10. Turn the engine switch off.

      11. Remove the timing light.

      12. Close the IG cover.

      13. Install the No. 1 engine cover Click here.

  8. INSPECT ENGINE IDLE SPEED

    Note


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

    • Inspect the ignition timing with the cooling fan off.

    • When checking the ignition timing, move the shift lever to N.


    1. When using intelligent tester:


      1. Turn off all the accessories and air conditioning.

      2. Move the shift lever to P.

      3. Connect the intelligent tester to the DLC3.

      4. Warm up the engine.

      5. Enter the following menus: Powertrain / Engine and ECT / Data List / Engine SPD.

      6. Read Engine SPD to check the idle speed while the cooling fan is not rotating.

        Standard idle speed
        600 to 700 rpm

      7. Turn the engine switch off.

      8. Disconnect the tester from the DLC3.

    2. A00DRDYE02
      Text in Illustration
      *1 Front view of DLC3:

      When not using intelligent tester:


      1. Turn off all the accessories and air conditioning.

      2. Move the shift lever to P.

      3. Connect SST to terminal 9 (TAC) of the DLC3, and then connect a tachometer to SST.

        SST
        09843-18030

      4. Warm up the engine.

      5. Check the idle speed while the cooling fan is not rotating.

        Standard idle speed
        600 to 700 rpm

      6. Turn the engine switch off.

      7. Remove the tachometer and disconnect SST from the DLC3.

  9. INSPECT COMPRESSION


    1. Warm up and stop the engine.

    2. Remove the 4 spark plugs Click here.

    3. A00DTKGE01

      Disconnect the 4 fuel injector connectors.

    4. A00DQ0RE12
      Text in Illustration
      *1 Compression Gauge

      Insert the compression gauge into the spark plug hole.

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

      Standard compression pressure
      1300 kPa (13.3 kgf/cm2, 189 psi) or higher
      Minimum pressure
      1000 kPa (10 kgf/cm2, 145 psi)
      Standard 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.

      • Check the other cylinder compression pressures in the same way.

      • This measurement must be completed as quickly as possible.

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

      Tech Tips


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

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

    6. A00DTKGE01

      Connect the 4 fuel injector connectors.

    7. Install the 4 spark plugs Click here.

  10. INSPECT CO

    Tech Tips

    This check is used only to determine whether or not the idle CO complies with regulations.


    1. Initial condition:


      1. Engine at normal operating temperature

      2. Air cleaner installed

      3. All pipes and hoses of the air induction system connected

      4. All accessories switched off

      5. All vacuum lines properly connected

      6. SFI system wiring connectors fully seated

      7. Ignition timing set correctly

      8. Shift lever in N

      9. Tachometer and CO meter calibrated with engine idling

        Note

        If a CO meter is not available, do not attempt to adjust the idle mixture. Always use a CO meter when adjusting the idle mixture. It is unnecessary to use the idle mixture screw for adjustments if the vehicle is in good condition.

    2. Warm up the engine by driving at a constant speed (approximately 50 km/h (31 mph)). Release the accelerator pedal after the engine coolant temperature becomes stable (85 to 90°C (185 to 194°F)) and idle the engine for 5 minutes.

    3. Insert a tester probe at least 40 cm (1.31 ft) into the tailpipe.

    4. Wait at least 1 minute before measurement to allow the concentration to stabilize. Complete the measurement within 3 minutes.

      Idle CO concentration
      1.0 to 2.0%
    5. A00DS5ZE04

      If the CO concentration does not conform to regulations, adjust it by turning the idle mixture adjusting screw in the variable resistor with SST.

      SST
      09243-00020
    6. A00DPUWE01

      The idle mixture adjusting screw can be adjusted within a 180° range.

      Tech Tips


      • If the CO concentration is within the specification, this adjustment is complete.

      • If the CO concentration cannot be corrected by idle mixture adjustment, see the table below for other possible causes.

    7. Remove SST.

      CO Problems Causes
      High Rough idle (black smoke from exhaust)

      1. Clogged air filter

      2. Plugged ventilation valve

      3. Faulty SFI system:


        • Faulty fuel pressure regulator

        • Defective Engine Coolant Temperature (ECT) sensor

        • Faulty ECM

        • Faulty injectors

        • Faulty throttle body assembly

        • Faulty MAF meter

      4. Variable resistor circuit Click here