On-Vehicle Inspection

(See ON-VEHICLE INSPECTION )

(See ON-VEHICLE INSPECTION )

(See ON-VEHICLE INSPECTION )

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 filter.

1. Warm up and stop the engine.
2. When the Techstream:
   1. Connect the Techstream to the DLC3.
   2. Turn the ignition switch to ON.
   3. Turn the tester ON.
   4. Select the following menu items: Power Train / Engine and ECT / Data List / IGN Advance
   5. Start the engine.
   6. According to the display on tester, read the Data List.

      Standard ignition timing: BTDC 0 to 15° at idle 

   7. Check that the ignition timing advances immediately when the engine speed is increased.
   8. Turn the ignition switch to OFF.
   9. Disconnect the Techstream from the DLC3.
3. When not using the Techstream:
   1. Remove the No. 1 engine cover (See REMOVAL ).
   2. Open the ignition cover located to the right of the No. 4 ignition coil.
   3. Pull the wire harness out from the IG cover.
      Fig 1: Identifying IG Cover

      Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
   4. Connect a timing light to the wire harness.
      NOTE: Use a timing light that detects the first signal.
   5. 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: BTDC 8 to 12° at idle 

      HINT:

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

      Fig 2: Identifying DLC3 Terminals TC And CG

      Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
   7. Remove SST from the DLC3.
   8. Allow the engine to idle and check the ignition timing.

      Standard ignition timing: BTDC 5 to 15° 

   9. Check that the ignition timing advances immediately when the engine speed is increased.
   10. Turn the ignition switch OFF.
   11. Remove the timing light.
   12. Close the IG cover.
   13. Install the No. 1 engine cover (see INSTALLATION ).

1. When using the Techstream:
   1. Warm up the engine.
   2. Turn the ignition switch to OFF.
   3. Connect the Techstream to the DLC3.
   4. Turn the ignition switch to ON.
   5. Turn the tester ON.
   6. Select the following menu items: Power Train / Engine and ECT / Data List / Engine Speed
   7. Start the engine.
   8. According to the display on tester, read the Data List.

      Standard idle speed: 600 to 700 rpm 

   9. Turn the ignition switch to OFF.
   10. Disconnect the Techstream from the DLC3.
2. When not using the Techstream:
   1. Turn OFF all the accessories and air conditioning.
   2. Move the shift lever to P or neutral.
   3. Connect SST to 9 (TAC) of the DLC3 terminal, and then connect a tachometer to SST.

      SST 09843-18030 

      Fig 3: Identifying DLC3 Terminal TAC

      Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
   4. Warm up the engine.
   5. Check the idle speed while the radiator-cooling fan is not rotating.

      Standard idle speed: 600 to 700 rpm 

   6. Turn the ignition switch OFF.
   7. Remove the tachometer and disconnect SST from the DLC3.

1. Warm up and then stop the engine.
2. Remove the 4 ignition coils and spark plugs (See REMOVAL ).
3. Disconnect the 4 fuel injector connectors.
4. Set SST and a compression gauge.

   SST 09992-00500 

5. Insert the compression gauge into the spark plug hole.
6. While cranking the engine, measure the compression pressure.

   Standard compression pressure: 1300 kPa (13.3 kgf/cm ²  , 189 psi) 

   Minimum compression pressure: 1000 kPa (10.0 kgf/cm ²  , 145 psi) 

   Standard difference between each cylinder: 100 kPa (1.0 kgf/cm ²  , 15 psi) 

   Fig 4: Measuring Compression Pressure

   Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
   NOTE:

   • Always use a fully charged battery to obtain an engine speed of 250 rpm or more.
   • Check the other cylinders' compression pressures in the same way.
   • This measurement must be done 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.

   HINT:

   • 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.
7. Connect the 4 fuel injector connectors.
8. Install the 4 spark plugs and ignition coils. (See INSTALLATION )

HINT:

The ECM properly controls the CO/HC concentration in the emission gas.

1. Start and warm up the engine.
2. Run the engine at 2500 rpm for approximately 180 seconds.
3. Insert the CO/HC meter testing probe at least 40 cm (1.3 ft.) into the tailpipe while idling.
4. Inspect the CO/HC concentration while idling and/or at 2500 rpm.

   If the CO/HC concentration is not as specified, perform troubleshooting.

   HINT:

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

   POSSIBLE CAUSES
   
   

   CO	HC	Problems	Causes
   Normal	High	Rough idle	Faulty ignition: Incorrect timing Plugs are contaminated, shorted, or gaps are defective Incorrect valve clearance Leaks in intake and exhaust valve Leaks in cylinders
   Low	High	Rough idle (Fluctuating HC reading)	Vacuum leakage: Ventilation hoses Intake manifold Throttle body Brake booster line Lean mixture causing misfire
   High	High	Rough idle (Black smoke from exhaust)	Restricted air filter Plugged PCV valve Faulty SFI system: Faulty pressure regulator Faulty engine coolant temperature sensor Faulty mass air flow meter Faulty ECM Faulty injectors Faulty throttle body