Engine

1UR-FE ENGINE MECHANICAL: ENGINE: ON-VEHICLE INSPECTION

1. INSPECT IGNITION TIMING

NOTICE:
* Turn all electrical systems off.
* Perform the inspection when the cooling fan motor is turned off.

(a) Warm up the engine.

(b) When using the Techstream:

(1) Connect the Techstream to the DLC3.

(2) Enter the following menus: Powertrain / Engine and ECT / Data List / All Data / IGN Advance.

Standard ignition timing:

7 to 24° BTDC @ idle (transmission in neutral and A/C switch off)

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

(3) Check that the ignition timing advances immediately when the engine speed is increased.

(4) Disconnect the Techstream from the DLC3.

(c) When not using the Techstream:

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

SST : 09843-18040





Text in Illustration





NOTICE:
Be sure not to improperly connect the terminals. This may damage the engine.

(2) Connect the tester probe of a timing light to the wire of the ignition coil connector for the No. 1 cylinder.

NOTICE:
Use a timing light that detects primary signals.

(3) Inspect the ignition timing during idling.





Standard ignition timing:

8 to 12° BTDC @ idle (transmission in neutral and A/C switch off)

(4) Remove SST from the DLC3.

(5) Inspect the ignition timing during idling.

Standard ignition timing:

7 to 24° BTDC @ idle (transmission in neutral and A/C switch off)

(6) Disconnect the timing light from the engine.

2. INSPECT ENGINE IDLE SPEED

NOTICE:
* Turn all the electrical systems off.
* Perform the inspection when the cooling fan motor is turned off.

(a) Warm up the engine.

(b) When using the Techstream:

(1) Connect the Techstream to the DLC3.

(2) Enter the following menus: Powertrain / Engine and ECT / Data List / All Data / Engine Speed.

Standard idle speed:

550 to 780 rpm (transmission in neutral and A/C switch off)

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

(3) Disconnect the Techstream from the DLC3.

(c) When not using the Techstream:

(1) Connect SST to terminal 9 (TAC) of the DLC3.

SST : 09843-18030





Text in Illustration





NOTICE:
Be sure not to improperly connect SST. This may damage the engine.

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

(3) Inspect the engine idle speed.

Standard idle speed:

550 to 780 rpm (transmission in neutral and A/C switch off)

3. INSPECT COMPRESSION

(a) Warm up and stop the engine.

(b) Remove the 8 spark plugs Removal.

(c) Disconnect the 8 fuel injector connectors.

(d) Inspect the cylinder compression pressure.

(1) Insert a compression gauge into the spark plug hole. (Procedure A)

(2) While cranking the engine, measure the compression pressure. (Procedure B)

Compression pressure:

1300 kPa (13.3 kgf/cm2, 189 psi) or higher

Minimum pressure:

1000 kPa (10.2 kgf/cm2, 145 psi)

Difference between each cylinder:

100 kPa (1.0 kgf/cm2, 15 psi) or less

NOTICE:
* Use a fully-charged battery so that the engine speed can be increased to 250 rpm or more.
* Measure the compression in as short a time as possible.

(3) If the cylinder compression is low, pour a small amount of engine oil into the cylinder through the spark plug hole and repeat procedures A and B for cylinders with low compression.

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 from the gasket.

(4) Repeat procedures A and B for each cylinder.

(e) Connect the 8 injector connectors.

(f) Install the 8 spark plugs Installation.

4. INSPECT CO/HC

HINT
This check is to determine whether or not the idle CO/HC concentration complies with regulations.

(a) Start the engine.

(b) Run the engine at 2500 rpm for approximately 180 seconds.

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

(d) Immediately check the CO/HC concentration during idling and/or at 2500 rpm.

HINT
When carrying out the 2 tests (idling and 2500 rpm), the measurement procedures are prescribed by applicable local regulations.

(e) If the CO/HC concentration does not comply with regulations, perform troubleshooting in the order given below.

(1) Check the air fuel ratio sensor operation Air Fuel Ratio Sensor and heated oxygen sensor operation Heated Oxygen Sensor.

(2) Refer to the table below for possible causes, and then inspect and correct the corresponding causes if necessary.