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On-Vehicle Inspection [10/2014 - ]: Procedure

  1. INSPECT ENGINE COOLANT 

    (Refer to ON-VEHICLE INSPECTION [10/2014 - ] )

  2. INSPECT ENGINE OIL 

    (Refer to ON-VEHICLE INSPECTION [10/2014 - ] )

  3. CHECK BATTERY CONDITION 

    (Refer to ON-VEHICLE INSPECTION [10/2014 - ] )

  4. 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 excessively damaged or oily. If necessary, replace the air cleaner filter element sub-assembly.

      HINT: 

      • 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 remains even after cleaning the air cleaner filter element sub-assembly with compressed air, replace it.
    3. Install the air cleaner filter element sub-assembly.
  5. INSPECT V-RIBBED BELT 

    (Refer to ON-VEHICLE INSPECTION [10/2014 - ] )

  6. INSPECT V-RIBBED BELT TENSIONER ASSEMBLY 
    1. Remove the V-ribbed belt (Refer to REMOVAL [10/2014 - ] .
    2. Check that nothing is caught in the tensioner by turning it clockwise and counterclockwise. If a malfunction exists, replace the V-ribbed belt tensioner assembly.
    3. Install the V-ribbed belt (Refer to INSTALLATION [10/2014 - ] .
  7. CHECK SPARK PLUG 

    (Refer to ON-VEHICLE INSPECTION [10/2014 - ] )

  8. 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 30 minutes or more, then perform the preceding inspection.

      HINT: 

      If any defects or problems are found during the preceding inspection, perform valve lash adjuster assembly inspection See step  2.

  9. INSPECT IGNITION TIMING 
    1. Warm up and stop the engine.

      HINT: 

      A warmed up engine should have an engine coolant temperature of over 80°C (176°F), an engine oil temperature of 60°C (140°F), and the engine speed should be stabilized.

    2. When using the Techstream:

      Check the ignition timing.

      1. Connect the Techstream to the DLC3.
      2. Start the engine and run it at idle.
      3. Turn the Techstream on.
      4. Enter the following menus: Powertrain / Engine / Data List / IGN Advance.

        Standard ignition timing

        9.5 to 24.5° BTDC at idle

        NOTE:
        • Check the ignition timing with the cooling fans off.
        • Turn off all electrical systems and the A/C.
        • When checking the ignition timing, the transaxle should be in neutral or park.

        HINT: 

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

      5. Check that the ignition timing advances immediately when the engine speed is increased.
      6. Enter the following menus: Powertrain / Engine / Active Test / Connect the TC and TE1 / ON.
      7. Monitor IGN Advance.
      8. Perform the Active Test.

        Standard ignition timing

        8 to 12° BTDC at idle

        NOTE:

        When checking the ignition timing, the transaxle should be in neutral or park.

        HINT: 

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

    3. When not using the Techstream:
      1. Using SST, connect terminals 13 (TC) and 4 (CG) of the DLC3.
        GTY572830Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
        TEXT IN ILLUSTRATION

        *1 DLC3
        • SST: 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 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.
      2. Remove the V-bank cover sub-assembly See step  17.
      3. Connect the timing light tester probe to the ignition coil wire for the No. 1 cylinder.
        NOTE:

        Use a timing light that detects primary signals.

      4. Check the ignition timing at idle.

        Standard ignition timing

        8 to 12° BTDC at idle

        NOTE:

        When checking the ignition timing, the transaxle should be in neutral or park.

        HINT: 

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

      5. Disconnect terminals 13 (TC) and 4 (CG) of the DLC3.
      6. Check the ignition timing at idle.

        Standard ignition timing

        9.5 to 24.5° BTDC at idle

      7. Confirm that the ignition timing advances immediately when the engine speed is increased.
      8. Remove the timing light from the engine.
      9. Install the V-bank cover sub-assembly See step  82.
  10. INSPECT ENGINE IDLE SPEED 
    1. Warm up and stop the engine.

      HINT: 

      A warmed up engine should have an engine coolant temperature of over 80°C (176°F), an engine oil temperature of 60°C (140°F), and the engine speed should be stabilized.

    2. When using the Techstream:
      1. Connect the Techstream to the DLC3.
      2. Start the engine and run it at idle.
      3. Turn the Techstream on.
      4. Enter the following menus: Powertrain / Engine / Data List / Engine Speed.
      5. Read the value displayed on the tester.

        Standard idle speed

        600 to 700 rpm

        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.

        HINT: 

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

    3. When not using the Techstream:
      1. Using SST, connect a tachometer probe to terminal 9 (TAC) of the DLC3.
        GTY580022Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
        TEXT IN ILLUSTRATION

        *1 DLC3
        • SST: 09843-18030 
      2. Check the idle speed.

        Standard idle speed

        600 to 700 rpm

        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.
  11. INSPECT COMPRESSION 
    1. Warm up and stop the engine.

      HINT: 

      A warmed up engine should have an engine coolant temperature of over 80°C (176°F), an engine oil temperature of 60°C (140°F), and the engine speed should be stabilized.

    2. Remove the 6 spark plugs (Refer to REMOVAL [10/2014 - ] .
    3. Check the cylinder compression pressure.
      GTY146484Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
      1. Insert a compression gauge into the spark plug hole.
      2. While cranking the engine, measure the compression pressure.

        Standard compression pressure

        1300 kPa (13.3 kgf/cm2 , 189 psi)

        Minimum compression pressure

        1000 kPa (10.2 kgf/cm2 , 145 psi)

        NOTE:
        • Use a fully charged battery so that the engine speed can be increased to 250 rpm or more.
        • Inspect the other 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 and inspect it again.

        HINT: 

        • 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.
    4. Install the 6 spark plugs (Refer to INSTALLATION [10/2014 - ] .
  12. INSPECT CO/HC 

    HINT: 

    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 (1.31 ft.) into the tailpipe during idle.
    4. Immediately check CO/HC concentration during idle and when running at 2500 rpm.

      HINT: 

      When performing the 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, perform troubleshooting in the order given below.

      1. Check for DTCs (Refer to DTC CHECK / CLEAR [10/2014 - ] .
      2. See the table below for possible causes, then inspect and correct the applicable causes 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 in throttle with motor body assembly)
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