ENGINE ON-VEHICLE INSPECTION

INSPECT ENGINE COOLANT

Click here

INSPECT ENGINE OIL

Click here

INSPECT BATTERY

Click here

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.

   Tech Tips

   • If there is any dirt or a blockage in the air cleaner filter element sub-assembly, clean it with compressed air.

   • If any dirt or a blockage 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.

INSPECT SPARK PLUG

Click here

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 over 30 minutes. Then perform the inspection above again.

   If any defects or problems are found during the inspection above, perform a lash adjuster inspection Click here.

INSPECT IGNITION TIMING

1. Warm up and stop the engine.

2. When using the Techstream:

   1. Connect the Techstream to the DLC3.

      Note

      When checking the ignition timing, the transmission should be in neutral.

   2. Start the engine and idle it.

   3. Turn the Techstream main switch on.

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

      Standard ignition timing
      BTDC 5 to 15 deg. at idle

      Tech Tips

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

      If the ignition timing is not as specified, check the valve timing.

   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 of the Data List.

      Standard ignition timing
      BTDC 8 to 12 deg. at idle

      Tech Tips

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

      If the ignition timing is not as specified, check the valve timing.

   8. Enter the following menus: Connect the TC and TE1 / OFF.

   9. Turn the ignition switch off.

   10. Disconnect the Techstream from the DLC3.

3. When not using the Techstream:

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

   2. Pull out the wire harness as shown in the illustration.

      

   3. Connect the clip of a timing light to the wire harness.

      Note

      Use a timing light that detects primary signals.

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

      

      Text in Illustration

      *1

      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 transmission should be in neutral.

   5. Using a timing light, check the ignition timing.

      Standard ignition timing
      8 to 12° BTDC at idle

   6. Remove SST from the DLC3.

   7. Check the ignition timing.

      Standard ignition timing
      5 to 15° BTDC at idle

      If the ignition timing is not as specified, check the valve timing.

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

   9. Disconnect the timing light from the engine.

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

INSPECT ENGINE IDLE SPEED

1. Warm up and stop the engine.

2. When using the Techstream:

   1. Connect the Techstream to the DLC3.

      Note

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

      • When checking the idle speed, the transmission should be in neutral.

   2. Race the engine at 2500 rpm for approximately 90 seconds.

   3. Turn the Techstream main switch on.

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

      Standard idle speed
      610 to 710 rpm

      Tech Tips

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

      If the idle speed is not as specified, check the air intake system.

   5. Disconnect the Techstream from the DLC3.

3. When not using the Techstream:

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

      

      Text in Illustration

      *1

      DLC3

      SST

      09843-18030

      Note

      • Confirm the terminals before connecting them. Connecting the wrong terminals may result in damage to electrical components.

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

      • Inspect the idle speed with the cooling fans off.

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

   2. Race the engine at 2500 rpm for approximately 90 seconds.

   3. Check the idle speed.

      Standard idle speed
      610 to 710 rpm

      If the speed is not as specified, check the air intake system.

   4. Disconnect the tachometer probe from the DLC3.

INSPECT COMPRESSION

1. Warm up and stop the engine.

2. Check for DTCs Click here.

3. Remove the 4 spark plugs Click here.

4. Disconnect the 4 fuel injector connectors.

5. Insert a compression gauge into the spark plug hole.

   

6. Fully open the throttle.

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

   Standard compression pressure
   1450 kPa (14.8 kgf/cm2, 210 psi)

   Minimum pressure
   980 kPa (10.0 kgf/cm2, 142 psi)

   Difference between each cylinder
   100 kPa (1.0 kgf/cm2, 15 psi)

   Tech Tips

   Always use a fully charged battery to obtain an engine speed of 250 rpm or more.

8. If the cylinder compression is low in one or more cylinders, pour a small amount of engine oil into the cylinder with low compression through its spark plug hole. Then inspect the cylinder compression pressure again.

   Tech Tips

   • If adding oil helps boost the compression, it is likely that the piston rings and/or cylinder bore is worn or damaged.

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

9. Connect the 4 fuel injector connectors.

10. Install the 4 spark plugs Click here.

11. Clear the DTCs Click here.

INSPECT CO/HC

1. Start the engine.

2. Keep the engine speed at 2500 rpm for approximately 180 seconds.

3. Insert the CO/HC meter testing probe at least 40 cm (1.31 ft.) into the tailpipe during idling.

4. Immediately check CO/HC concentration at idle and 2500 rpm.

   Tech Tips

   • When performing the 2 mode (2500 rpm and idle) test, follow the measurement order prescribed by the applicable local regulations.

   • If the CO/HC concentration does not comply with regulations, troubleshoot in the order given below.

   1. Check the DTCs Click here.

   2. See the table below for possible causes, and then inspect and correct the applicable causes if necessary.

      CO	HC	Symptom	Causes
      Normal	High	Rough idle	1. Faulty ignition Incorrect timing Plugs are contaminated or shorted, or gaps are defective 2. Leaky intake and exhaust valves 3. Leaky cylinder
      Low	High	Rough idle (Fluctuating HC reading)	1. Vacuum leaks PCV hose Intake manifold Throttle body Brake booster line 2. Lean mixture causing misfire
      High	High	Rough idle (Black smoke from exhaust)	1. Restricted air filter 2. Faulty SFI system Faulty pressure Defective ECT sensor Faulty ECM Faulty injector Faulty throttle position sensor Faulty MAF sensor