On-Vehicle Inspection
2AR-FE ENGINE MECHANICAL: ENGINE: ON-VEHICLE INSPECTION
HINT
The type of ignition switch used on this model differs according to the specifications of the vehicle. For the expressions listed in this section, refer to the "Ignition Switch Expressions" precaution Service Precautions.
1. INSPECT VALVE LASH ADJUSTER ASSEMBLY 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.
2. INSPECT IGNITION TIMING
(a) Warm up and stop the engine.
(b) When using the Techstream:
(1) Connect the Techstream to the DLC3.
(2) Start the engine and idle it.
(3) Turn the Techstream on.
(4) Enter the following menus: Powertrain / Engine and ECT / Data List / Primary / IGN Advance.
Standard ignition timing:
5 to 15° BTDC @ idle
HINT
Refer to the Techstream operator's manual for further details.
If the ignition timing is not as specified, check the valve timing.
(c) When not using the Techstream:
(1) 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.
(2) Using SST, connect terminals 13 (TC) and 4 (CG) of the DLC3.
SST : 09843-18040
Text in Illustration
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.
(3) Using a timing light, check the ignition timing.
Standard ignition timing:
8 to 12° BTDC @ idle
(4) Remove SST from the DLC3.
(5) Check the ignition timing.
Standard ignition timing:
5 to 15° BTDC @ idle
If the ignition timing is not as specified, check the valve timing.
(6) Check that the ignition timing advances immediately when the engine speed is increased.
(7) Disconnect the timing light from the engine.
3. INSPECT ENGINE IDLE SPEED
(a) Warm up and stop the engine.
(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 on.
(4) Enter the following menus: Powertrain / Engine and ECT / Data List / Primary / Engine Speed.
Standard idle speed:
600 to 700 rpm
HINT
Refer to the Techstream operator's manual for further details.
NOTICE:
When checking the idle speed, the transmission should be in neutral.
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 : 09843-18030
Text in Illustration
NOTICE:
Confirm the terminal number before connecting the probe. Connecting the wrong terminals can damage the engine.
(2) Race the engine at 2500 rpm for approximately 90 seconds.
(3) Check the idle speed.
Standard idle speed (Transmission in neutral):
600 to 700 rpm
If the speed is not as specified, check the air intake system.
(4) Disconnect the tachometer probe from the DLC3.
4. INSPECT COMPRESSION
(a) Warm up and stop the engine.
(b) Check for DTCs Reading and Clearing Diagnostic Trouble Codes.
(c) Remove the 4 spark plugs Removal.
(d) Disconnect the 4 fuel injector connectors.
(e) Insert a compression gauge into the spark plug hole.
(f) Fully open the throttle.
(g) While cranking the engine, measure the compression pressure.
Standard compression pressure:
1450 kPa (14.7 kgf/cm2, 210 psi) or higher
Minimum pressure:
980 kPa (9.9 kgf/cm2, 142 psi)
Difference between each cylinder:
200 kPa (2.0 kgf/cm2, 29 psi) or less
HINT
Always use a fully charged battery to obtain an engine speed of 250 rpm or more.
(h) 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 is worn or damaged.
* If the pressure stays low, a valve may be stuck or seated improperly, or there may be leakage from the gasket.
(i) Connect the 4 fuel injector connectors.
(j) Install the 4 spark plugs Installation.
(k) Clear the DTCs Reading and Clearing Diagnostic Trouble Codes.
5. 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 a CO/HC meter testing probe at least 40 cm (1.31 ft.) into the tailpipe during idling.
(d) Immediately check the CO/HC concentration at idle and at 2500 rpm.
HINT
* 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 air fuel ratio sensor Air Fuel Ratio Sensor and heated oxygen sensor Heated Oxygen Sensor operation.
(2) See the table below for possible causes, and then inspect and correct the applicable causes if necessary.
