ENGINE ON-VEHICLE INSPECTION

PROCEDURE

1. INSPECT ENGINE COOLANT

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2. INSPECT ENGINE OIL

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3. INSPECT BATTERY CONDITION

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4. INSPECT SPARK PLUG

   Click here

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

      Tip:

      • 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 remain even after cleaning the air cleaner filter element sub-assembly with compressed air, replace it.

   3. Install the air cleaner filter element sub-assembly.

6. INSPECT V-RIBBED BELT

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7. INSPECT V-RIBBED BELT TENSIONER ASSEMBLY

   1. Remove the V-ribbed belt.

      Click here

   2. Turn the V-ribbed belt tensioner assembly clockwise and counterclockwise and check that it turns smoothly and does not catch.

      Tip:

      If the V-ribbed belt tensioner assembly does not turn smoothly or catches, replace the V-ribbed belt tensioner assembly.

   3. Install the V-ribbed belt.

      Click here

8. INSPECT VALVE LASH ADJUSTER ASSEMBLY NOISE

   1. Rev up 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 inspection.

      Tip:

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

      3. Turn the GTS on.

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

         Powertrain > Engine > Data List

         Tester Display
         IGN Advance

         Standard Ignition Timing

         -5 to 25° 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.

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

         Powertrain > Engine > Active Test

         Active Test Display
         Connect the TC and TE1

         Data List Display
         IGN Advance

      6. Monitor IGN Advance of the Data List.

         Standard Ignition Timing

         8 to 12° BTDC at idle

      7. Enter the following menus: Powertrain / Engine / Active Test / Connect the TC and TE1 / OFF.

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

   3. When not using the GTS:

      1. 

         *a

         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 may damage electrical components.

         • 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.

      2. Remove the No. 1 engine cover sub-assembly.

         Click hereClick hereClick hereClick here

      3. 

         Connect the clip of a timing light to the ignition coil wire for the No. 1 cylinder.

         Note:

         Use a timing light that detects primary signals.

      4. Start the engine and run it at idle.

      5. 

         *a	TDC
         *b	10° BTDC
         *c	Cutout

         Check the ignition timing at idle.

         Standard Ignition Timing

         8 to 12° BTDC at idle

         Tip:

         If the cutout of the crankshaft pulley is at a position between the protrusion (10° BTDC) of the timing chain cover assembly and TDC, the ignition timing meets the standard.

      6. Disconnect terminals 13 (TC) and 4 (CG) of the DLC3.

      7. Check the ignition timing at idle.

         Standard Ignition Timing

         -5 to 25° BTDC at idle

      8. Confirm that the ignition timing advances immediately when the engine speed is increased.

      9. Disconnect the clip of the timing light from the ignition coil wire for the No. 1 cylinder.

      10. Install the No. 1 engine cover sub-assembly.

          Click hereClick hereClick hereClick here

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 run it at idle.

       3. Turn the GTS on.

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

          Powertrain > Engine > Data List

          Tester Display
          Engine Speed

       5. Read the value displayed on the tester.

          Standard Idle Speed

          for Manual Transaxle

          600 to 700 rpm

          for CVT

          680 to 780 rpm

          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 neutral or park.

    3. When not using the GTS:

       1. 

          *a

          DLC3

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

          09843-18030

          Note:

          Be sure to connect the tachometer probe to the correct terminal. Connecting the wrong terminals can cause damage to electrical components.

       2. Start the engine and run it at idle.

       3. Inspect the engine idle speed.

          Standard Idle Speed

          for Manual Transaxle

          600 to 700 rpm

          for CVT

          680 to 780 rpm

          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 neutral or park.

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

11. INSPECT COMPRESSION

    Note:

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

    1. Warm up and stop the engine.

    2. Check for DTCs.

       Click here

    3. Remove the outer cowl top panel.

       for LHD:Click hereClick hereClick hereClick here

       for RHD:Click here

    4. Remove the 4 spark plugs.

       Click here

    5. 

       Disconnect the engine wire connector as shown in the illustration.

       Note:

       Disable fuel injection in order to prevent catalyst damage due to unburned gasoline.

    6. Check the cylinder compression pressure.

       1. 

          Insert a compression gauge into the spark plug hole.

       2. Fully open the throttle.

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

          Standard Compression Pressure

          1080 kPa (11.0 kgf/cm², 157 psi)

          Minimum Compression Pressure

          880 kPa (9.0 kgf/cm², 128 psi)

          Pressure 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.

          • Inspect all cylinders in the same way.

          • Measure the compression pressure as quickly as possible.

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

          Tip:

          • 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.

    7. Connect the engine wire connector.

    8. Install the 4 spark plugs.

       Click here

    9. Install the outer cowl top panel.

       for LHD:Click hereClick hereClick hereClick here

       for RHD:Click hereClick here

    10. Clear the DTCs.

        Click here

        Note:

        After the inspection, clear the DTCs, check for DTCs again and make sure the normal system code is output.

12. INSPECT CO/HC

    Tip:

    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 the CO/HC concentration during idle and when the engine is running at 2500 rpm.

       Tip:

       When performing a 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.

          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	Faulty ignition: Incorrect valve timing Fouled, shorted or improperly gapped spark plugs Incorrect valve clearance (valve lash adjuster assembly) Leaks in intake or exhaust valves Leaks in cylinders
          Low	High	Rough idle (Fluctuating HC reading)	Vacuum leaks: PCV hoses Intake manifold Throttle with motor body assembly Lean mixture causing misfire
          High	High	Rough idle (Black smoke from exhaust)	Restricted air cleaner filter element sub-assembly Plugged PCV valve Faulty SFI systems: Fuel pressure regulator assembly Engine coolant temperature sensor Mass air flow meter sub-assembly ECM Fuel injector assemblies Throttle position sensor (built into throttle with motor body assembly)