Engine
2AZ-FXE ENGINE MECHANICAL: ENGINE: INSPECTION
1. INSPECT COOLANT (for Engine)
(a) Inspect the engine coolant Testing and Inspection.
2. INSPECT ENGINE OIL
(a) Inspect the engine oil Testing and Inspection.
3. INSPECT SPARK PLUGS
(a) Inspect the spark plugs Testing and Inspection.
4. INSPECT AIR CLEANER FILTER ELEMENT SUB-ASSEMBLY
(a) Remove the air cleaner filter element sub-assembly.
(b) Visually check that there is no dirt, blockage, and/or damage to the air cleaner filter element.
HINT
* If there is any dirt or a blockage in the air cleaner filter element, clean it with compressed air.
* If any dirt or a blockage remains even after cleaning the air cleaner filter element with compressed air, replace it.
5. INSPECT IGNITION TIMING
(a) Set the vehicle to inspection mode Component Tests and General Diagnostics.
(b) Warm up the engine.
(c) When using the Techstream:
(1) Connect the Techstream to the DLC3.
(2) Enter DATA LIST MODE on the Techstream.
Ignition timing:
5 to 25° BTDC at idle
NOTICE:
* Turn all the electrical systems off.
* Inspect the engine idle speed with the cooling fan off.
HINT
Refer to the Techstream operator's manual for help when selecting the DATA LIST.
(3) Check that the ignition timing advances immediately when the engine speed is increased.
(d) When not using the Techstream:
(1) Using SST, connect terminals 13 (TC) and 4 (CG) of the DLC3.
SST : 09843-18040
NOTICE:
* Confirm the terminal numbers before connecting them. Connection with a wrong terminal can damage the engine.
* Turn off all electrical systems before connecting the terminals.
* Perform this inspection after the cooling fan motor is turned off.
(2) Remove the No. 1 engine cover.
(3) Pull out the wire harness as shown in the illustration. Connect the clip of the timing light to the wire harness.
NOTICE:
Use a timing light which can detect the first signal.
(4) Check the ignition timing at idle.
Ignition timing:
5 to 25° BTDC at idle
NOTICE:
When checking the ignition timing, the transmission should be in parking range.
HINT
After engine rpm is kept at 1,000 to 1,300 rpm for 5 seconds, check that it returns to idle speed.
(5) Disconnect terminals 13 (TC) and 4 (CG) of the DLC3.
(6) Check the ignition timing at idle.
Ignition timing:
8 to 12° BTDC at idle
(7) Confirm that the ignition timing moves to the advanced angle side when the engine rpm is increased.
(8) Remove the timing light.
6. INSPECT ENGINE IDLE SPEED
(a) Set the vehicle to inspection mode Component Tests and General Diagnostics.
(b) Warm up the engine.
(c) When using the Techstream:
(1) Connect the Techstream to the DLC3.
HINT
Refer to the Techstream operator's manual for further details.
(2) Enter DATA LIST MODE on the Techstream.
Idle speed:
850 to 950 rpm
NOTICE:
* When checking the idle speed, the transmission should be in parking range.
* Check the idle speed with the cooling fan off.
* Switch off all accessories and air conditioning before connecting the Techstream.
(d) When not using the Techstream:
(1) Using SST, connect the tachometer tester probe to terminal 9 (TAC) of the DLC3.
SST : 09843-18030
(2) Check the idle speed.
Idle speed:
850 to 950 rpm
7. INSPECT COMPRESSION
(a) Set the vehicle to inspection mode Component Tests and General Diagnostics.
(b) Warm up and stop the engine.
(c) Disconnect the injector connectors.
(d) Remove the ignition coils.
NOTICE:
If the ignition coil assembly connector is disconnected because a DTC is detected in inspection, always reconnect it.
(e) Remove the spark plugs.
(f) Check the cylinder compression pressure.
(1) Insert a compression gauge into the spark plug hole.
(2) Connect the Techstream to the DLC3.
NOTICE:
Check the HV battery voltage in the data list to ensure that the battery is fully charged.
(3) Enter Active Test on the Techstream.
(4) While cranking the engine, measure the compression pressure.
Compression pressure:
1.360 MPa (13.9 kgf/ cm2, 198 psi)
Minimum pressure:
0.98 MPa (10 kgf/ cm2, 142 psi)
Difference between each cylinder:
100 kPa (1.0 kgf/ cm2, 14 psi)
NOTICE:
* Check the other cylinders' compression pressure in the same way.
* This measurement must be done as quickly as possible.
* After performing all the procedures, be sure to clear the DTCs stored in memory. Then, check that the normal system code is output.
(5) 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. INSPECT CO/HC
(a) Set the vehicle to inspection mode Component Tests and General Diagnostics.
(b) Start the engine.
(c) Run the engine at 2,500 rpm for approximately 180 seconds.
(d) Insert the CO/HC meter testing probe at least 40 cm (1.3 ft) into the tailpipe during idling.
(e) Immediately check CO/HC concentration at idle and at 2,500 rpm.
HINT
* Complete the measurement within 3 minutes.
* Check regulations and restrictions in your area when performing 2 mode CO/HC concentration testing (engine check at both idle speed and at 2,500 rpm).
(f) If the CO/HC concentration does not comply with regulations, troubleshoot in the order given below.
(1) Check A/F sensor operation Air Fuel Ratio Sensor.
(2) Check heated oxygen sensor operation Heated Oxygen Sensor.
(3) See the table below for possible causes, and then inspect and repair.
