ENGINE ON-VEHICLE INSPECTION

CAUTION / NOTICE / HINT

CAUTION:

To prevent injury due to contact with an operating cooling fan, keep your hands and clothing away from the cooling fans when working in the engine compartment with the engine running or the power switch on (IG).

A001P6T

PROCEDURE


  1. INSPECT COOLANT (for Engine)

    Click here

  2. INSPECT ENGINE OIL

    Click here

  3. CHECK AUXILIARY BATTERY

    Click here

  4. INSPECT SPARK PLUG

    Click here

  5. INSPECT AIR CLEANER FILTER ELEMENT SUB-ASSEMBLY

    Click here

  6. INSPECT VALVE LASH ADJUSTER ASSEMBLY NOISE


    1. Put the engine in inspection mode.

      Click here

    2. Rev up the engine several times. Check that the engine does not emit unusual noises.

    3. If unusual noises occur, warm up the engine and idle it for 30 minutes or more, then perform the inspection.

      Tech Tips

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

      Click here

  7. INSPECT IGNITION TIMING

    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 park.


    1. Put the engine in inspection mode.

      Click here

    2. Warm up and stop the engine.

    3. Connect the GTS to the DLC3.

    4. Put the engine in inspection mode.

      Click here

    5. Enter the following menus: Powertrain / Engine / Data List / Ignition Timing Cylinder #1.


      Powertrain > Engine > Data List
      Tester Display
      Ignition Timing Cylinder #1
      Standard Ignition Timing
      8 to 24° BTDC at idle

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

    7. Enter the following menus: Powertrain / Engine / Active Test / Activate the TC Terminal / ON.


      Powertrain > Engine > Active Test
      Active Test Display
      Activate the TC Terminal
      Data List Display
      Ignition Timing Cylinder #1

    8. Monitor Ignition Timing Cylinder #1 of the Data List.

      Standard Ignition Timing
      8 to 12° BTDC at idle

  8. INSPECT ENGINE IDLE SPEED

    Note


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

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

    • When checking the engine idle speed, the transaxle should be in park.


    1. Put the engine in inspection mode.

      Click here

    2. Warm up and stop the engine.

    3. When using the GTS:


      1. Connect the GTS to the DLC3.

      2. Put the engine in inspection mode.

        Click here

      3. Enter the following menus: Powertrain / Engine / Data List / Engine Speed.


        Powertrain > Engine > Data List
        Tester Display
        Engine Speed

      4. Read the value displayed on the GTS.

        Standard Idle Speed
        950 to 1050 rpm

    4. When not using the GTS:


      1. A001QP1C34
        *a DLC3

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

        SST
        09843-18030

        Note

        Be sure to connect the tachometer probe to the correct terminal. Connecting to the wrong terminal may result in damage to electrical components.

      2. Put the engine in inspection mode.

        Click here

      3. Inspect the engine idle speed.

        Standard Idle Speed
        950 to 1050 rpm

      4. Disconnect the tachometer probe from terminal 9 (TAC) of the DLC3.

  9. INSPECT COMPRESSION

    Note

    Keep the spark plug holes free of foreign matter when measuring the compression pressure.


    1. Put the engine in inspection mode.

      Click here

    2. Warm up and stop the engine.

    3. Check for DTCs.

      Click here

    4. Remove the 4 spark plugs.

      Click here

      Note

      DTCs will be stored if the inspection is performed with the ignition coil assembly connectors disconnected. Make sure that the ignition coil assembly connectors are connected during the inspection.

    5. Check the cylinder compression pressure.


      1. A001PMG

        Insert a compression gauge into the spark plug hole.

      2. Connect the GTS to the DLC3.

      3. Turn the power switch on (IG).

      4. Turn the GTS on.

        Note

        Check the HV battery voltage in the Data List to ensure that the battery is fully charged.

      5. Enter the following menus: Powertrain / Hybrid Control / Active Test / Compression Test / ON.


        Powertrain > Hybrid Control > Active Test
        Tester Display
        Compression Test

      6. Depress and hold the brake pedal, and turn the power switch on (READY). Then check the compression pressure.

        Standard Compression Pressure
        813 kPa (8.3 kgf/cm2, 118 psi)
        Minimum Compression Pressure
        617 kPa (6.3 kgf/cm2, 89.5 psi)
        Pressure Difference between Each Cylinder
        100 kPa (1.0 kgf/cm2, 15 psi) or less

        Note


        • Inspect all cylinders in the same way.

        • Measure the compression pressure as quickly as possible.

        • Noise may be emitted from the hybrid vehicle transaxle assembly. However, this is not a malfunction.

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

        Tech Tips


        • 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.

    6. Install the 4 spark plugs.

      Click here

    7. Clear the DTCs.

      Click here

      Note

      After performing the inspection, clear the DTCs and confirm that DTCs are not stored again or that the normal system code is output if using a check wire.

  10. INSPECT CO/HC

    Tech Tips

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


    1. Put the engine in inspection mode.

      Click here

    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 the CO/HC concentration at idle and then at an engine speed of 2500 rpm.

      Tech Tips


      • When performing a 2 mode test (with the engine idling/running at 2500 rpm), 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.

        Click here

      2. See the following table for possible causes, then inspect the applicable parts and repair them 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

        5. Faulty EGR
        Low High Rough idle (Fluctuating HC reading)

        1. Vacuum leaks:


          • PCV hoses

          • Intake manifold

          • Throttle body assembly

        2. Lean mixture causing misfire

        3. Faulty EGR
        High High Rough idle (Black smoke from exhaust)

        1. Restricted air cleaner filter element sub-assembly

        2. Plugged PCV valve

        3. Faulty SFI systems:


          • Fuel pressure regulator assembly

          • Engine coolant temperature sensor

          • Mass air flow meter

          • ECM

          • Fuel injector assemblies

          • Throttle position sensor (built into throttle with motor body assembly)

        4. Faulty EGR