Engine

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

1. CHECK V-RIBBED BELT

(a) Check the belt for wear, cracks or other signs of damage.

(a) If any of the following defects is found, replace the V-ribbed belt.

HINT
* The belt is cracked.
* The belt is worn out to the extent that the cords are exposed.
* The belt has chunks missing from the ribs.
(b) Check that the belt fits properly in the ribbed grooves.

HINT
Check with your hand to confirm that the belt has not slipped out of the groove on the bottom to the pulley. If it has slipped out, replace the V-ribbed belt. Install a new V-ribbed belt correctly.

2. INSPECT V-RIBBED BELT TENSIONER ASSEMBLY

(a) Check that nothing gets caught in the tensioner by turning it clockwise and counterclockwise.

(a) If a malfunction exists, replace the tensioner.

3. INSPECT VALVE LASH ADJUSTER NOISE

(a) 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 Engine Unit.

4. INSPECT IGNITION TIMING

(a) Warm up and stop the engine.

HINT
A warmed up engine should have an engine coolant temperature of over 80°C (176°F) and an engine oil temperature of 60°C (140°F), and the engine rpm should be stabilized.

(b) When using the Techstream:

(1) Connect the Techstream to the DLC3.

(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:

8 to 18° BTDC at idle

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

(c) When not using the Techstream:

(1) Remove the V-bank cover sub-assembly Removal.

(2) Remove the cool air intake duct seal Removal.

(3) Remove the engine room side cover LH Removal.

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

NOTICE:
Use a timing light that detects primary signals.

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

SST : 09843-18040

NOTICE:
* 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.
(6) Using a timing light, check the ignition timing.

Standard ignition timing:

8 to 12° BTDC at idle

(7) Remove SST from the DLC3.

(8) Check the ignition timing.

Standard ignition timing:

8 to 18° BTDC at idle

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

(10) Disconnect the timing light from the engine.

(11) Install the engine room side cover LH Installation.

(12) Install the cool air intake duct seal Installation.

(13) Install the V-bank cover sub-assembly Installation.

5. INSPECT ENGINE IDLE SPEED

(a) Warm up and stop the engine.

HINT
A warmed up engine should have an engine coolant temperature of over 80°C (176°F) and an engine oil temperature of 60°C (140°F), and the engine rpm should be stabilized.

(b) When using the Techstream:

(1) Connect the Techstream to the DLC3.

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

(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 and ECT / Data List / Engine Speed.

Standard idle speed:

700 to 800 rpm

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

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

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

(5) Disconnect the Techstream from the DLC3.

(c) When not using the Techstream:

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

SST : 09843-18040

NOTICE:
Confirm the terminal numbers before connecting them. Connecting the wrong terminals can damage the engine.

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

(3) Check the idle speed.

Idle speed (Transmission in neutral position):

700 to 800 rpm

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

(4) Disconnect the tachometer from the DLC3.

6. INSPECT COMPRESSION

(a) Warm up and stop the engine.

HINT
A warmed up engine should have an engine coolant temperature of over 80°C (176°F) and an engine oil temperature of 60°C (140°F), and the engine rpm should be stabilized.

(b) Disconnect the cable from the negative (-) battery terminal.

NOTICE:
When disconnecting the cable, some systems need to be initialized after the cable is reconnected Repair Instruction - Initialization.

(c) Disconnect the 2 injector connectors as shown in the illustration.

(d) Remove the 8 spark plugs Removal.

(e) Disconnect the 4 injector connectors as shown in the illustration.

(f) Cylinders positioned under the battery:

Inspect the compression pressure.

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

(2) Install the battery and tray.

(3) Connect the cable to the negative battery terminal.

(4) Fully open the throttle.

(5) Depress and hold the brake pedal, and turn the engine switch on (IG). Then check the compression pressure.

HINT
Always use a fully charged battery to obtain engine speed of 200 rpm or more.

NOTICE:
The measurement must be done as quickly as possible.

Standard compression pressure:

1400 kPa (14.2 kgf/cm2, 203 psi) or more

Minimum pressure:

980 kPa (9.9 kgf/cm2, 142 psi)

(6) Remove the compression gauge.

(7) Perform the inspection above for each cylinder.

(8) Check the pressure difference between each compression pressure.

Pressure difference:

100 kPa (1.0 kgf/cm2, 14.5 psi) or less

(9) 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.

HINT
* If adding oil helps boost the compression, it is likely that the piston rings and/or cylinder bore are worn or damaged.
* If pressure stays low, a valve may be stuck or seated improperly, or there may be leakage in the gasket.
(10) Disconnect the cable from the negative (-) battery terminal.

(11) Remove the battery and tray.

(h) Connect the 4 injector connectors as shown in the illustration.

(i) Connect the 2 injector connectors as shown in the illustration.

(j) Install the 8 spark plugs Installation.

(k) Connect the cable to the negative battery terminal.

NOTICE:
When disconnecting the cable, some systems need to be initialized after the cable is reconnected Repair Instruction - Initialization.

(l) Clear the DTCs DTC Check / Clear.

7. INSPECT CO/HC

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

(a) Start the engine.

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

(c) Insert the CO/HC meter testing probe at least 40 cm (1.3 ft) into the tailpipe during idle.

(d) Immediately check CO/HC concentration during idle and when running at 2500 rpm.

HINT
* When performing the 2 mode (with the engine idling/running at 2500 rpm) test, follow the measurement order 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 the A/F sensor and heated oxygen sensor operation.

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