On-Vehicle Inspection

1. Inspect the engine coolant (See COOLING SYSTEM ).

1. Inspect the engine oil (See LUBRICATION SYSTEM ).

1. Inspect the battery (See ON-VEHICLE INSPECTION ).

1. Remove the air cleaner cap sub-assembly (See REMOVAL ).
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 using the Techstream:
   1. Connect the Techstream to the DLC3.
   2. Turn the ignition switch to ON.
   3. Turn the Techstream on.
   4. Enter the following menus: Power Train / Engine and ECT / Data List / IGN Advance.
   5. Start the engine.
   6. According to the display on the Techstream, read the Data List.

      Standard ignition timing: 

      5 to 15° BTDC at idle 

   7. Check that the ignition timing advances immediately when the engine speed is increased.
   8. Turn the ignition switch off.
   9. Disconnect the Techstream from the DLC3.
3. When not using the Techstream:
   1. Remove the No. 1 engine cover sub-assembly (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.
   4. (4)Connect the timing light to the wire harness.
      NOTE: Use a timing light that detects the primary signal.
      Fig 1: Identifying Ignition Cover

      Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
   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: 

      8 to 12° BTDC at idle 

      HINT:

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

      Fig 2: Identifying Terminals (TC) And (CG) Of DLC3

      Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
   7. Disconnect SST from terminals 13 (TC) and 4 (CG) of the DLC3.
   8. Allow the engine to idle and check the ignition timing.

      Standard ignition timing: 

      5 to 15° BTDC at idle 

   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 sub-assembly (See INSTALLATION ).

1. Warm up and stop the engine.
2. When using the Techstream:
   1. Connect the Techstream to the DLC3.
   2. Turn the ignition switch to ON.
   3. Turn the Techstream on.
   4. Enter the following menus: Power Train / Engine and ECT / Data List / Engine Speed.
   5. Start the engine.
   6. According to the display on the Techstream, read the Data List.

      Standard idle speed: 

      600 to 700 rpm 

   7. Turn the ignition switch off.
   8. Disconnect the Techstream from the DLC3.
3. 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 terminal 9 (TAC) of the DLC3, and then connect a tachometer to SST.

      SST 09843-18030 

   4. Start the engine.
   5. Check the idle speed with the cooling fan off.

      Standard idle speed: 

      600 to 700 rpm 

   6. Turn the ignition switch off.
   7. Remove the tachometer and disconnect SST from the DLC3.
      Fig 3: Identifying Terminal (TAC) Of DLC3

      Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

1. Warm up and 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. Fully open the throttle.
7. 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) 

   Fig 4: Inserting Compression Gauge Into Spark Plug Hole

   Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

   Standard difference between each cylinder: 

   100 kPa (1.0 kgf/cm ²  , 15 psi) or less 

   NOTE:

   • Always use a fully-charged battery to obtain an engine speed of 250 rpm or more.
   • Check the other cylinders 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.
8. Connect the 4 fuel injector connectors.
9. Install the 4 spark plugs and ignition coils (See INSTALLATION ).

HINT:

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

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 during idle and when the engine is running at 2500 rpm.

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

   1. Check the A/F sensor and heated oxygen sensor operation.
   2. See the table below for possible causes, then inspect the applicable parts and repair them if necessary.
   TROUBLESHOOTING CHART
   
   

   CO	HC	Problem	Possible Cause
   Normal	High	Rough idle	Faulty ignition: Incorrect timing Plugs are contaminated, shorted, or gaps are defective Incorrect valve clearance Leaks in intake and exhaust valves 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 EFI system: Faulty pressure regulator Faulty engine coolant temperature sensor Faulty mass air flow meter Faulty ECM Faulty injectors Faulty throttle body