Engine: Testing and Inspection
ENGINE (2AZ-FE)INSPECTION
1. INSPECT ENGINE COOLANT
2. INSPECT ENGINE OIL
3. INSPECT BATTERY
4. INSPECT AIR CLEANER FILTER ELEMENT SUB-ASSEMBLY
5. INSPECT SPARK PLUG
6. INSPECT FAN AND GENERATOR V-BELT
HINT: You do not need to check the belt deflection because the auto tensioner has been adopted.
7. CHECK IGNITION TIMING
NOTICE:
- Turn all the electrical systems and the A/C OFF.
- Inspect the ignition timing with the cooling fan OFF.
- When checking the ignition timing, shift the transmission to the neutral position.
a. Warm up and stop the engine.
b. When using the handheld tester or OBD II scan tool:
1. Connect the handheld tester or OBD II scan tool to the DLC-3.
2. Turn the ignition switch to ON.
3. Select the following menu items: DIAGNOSIS / ENHANCED OBD II / DATA LIST / PRIMARY / IGN ADVANCE.
HINT: Refer to the handheld tester operator's manual for further information regarding the selection of Data List.
4. Inspect the ignition timing during idling.
Ignition timing: 5 to 15° BTDC
5. Check that the ignition timing advances immediately when the engine speed is increased.
6. Turn the ignition switch to OFF.
7. Disconnect the handheld tester or OBD II scan tool from the DLC-3.
c. When not using the handheld tester or OBD II scan tool:
1. Remove the engine cover No. 1.
2. Pull out the wire harness as shown in the illustration.
3. Connect the clip of the timing light to the engine.
NOTICE:
- Use a timing light that detects the first signal.
- After checking, be sure to wrap the wire harness with tape.
4. Using SST, connect terminals 13 (TC) and 4 (CG) of the DLC-3.
SST 09843-18040
NOTICE: Make sure of the terminal numbers before connecting them. Connecting the wrong terminals can damage the engine.
5. Turn the ignition switch to ON.
6. Inspect the ignition timing during idling.
Ignition timing: 8 to 12° BTDC
HINT: Run the engine speed at 1,000 to 1,300 rpm for 5 seconds, then check that the engine speed returns to the idling speed.
7. Disconnect terminals 13 (TC) and 4 (CG) of the DLC-3.
8. Inspect the ignition timing during idling.
Ignition timing: 5 to 15° BTDC
9. Check that the ignition timing advances immediately when the engine speed is increased.
10. Turn the ignition switch to OFF.
11. Remove the timing light.
12. Reinstall the engine cover No. 1.
8. INSPECT ENGINE IDLING SPEED
NOTICE:
- Turn all the electrical systems and the A/C OFF.
- Inspect the engine idling speed with the cooling fan OFF.
- When checking the idling speed, shift the transmission to the neutral position.
a. Warm up and stop the engine.
b. When using the handheld tester or OBD II scan tool:
1. Connect the handheld tester or OBD II scan tool to the DLC-3.
2. Turn the ignition switch to ON.
3. Select the following menu items: DIAGNOSIS / ENHANCED OBD II / DATA LIST / PRIMARY / ENGINE SPD.
HINT: Refer to the handheld tester operator's manual for further information regarding the selection of Data List.
4. Inspect the engine idling speed.
Idle speed:
610 to 710 rpm for automatic transaxle
650 to 750 rpm for manual transaxle
5. Turn the ignition switch to OFF.
6. Disconnect the handheld tester or OBD II scan tool from the DLC-3.
c. When not using the handheld tester or OBD II scan tool:
1. Install SST to terminal 9 (TAC) of DLC-3, then connect a tachometer.
SST 09843-18030
NOTICE: Make sure of the terminal numbers before connecting them. Connecting the wrong terminals can damage the engine.
2. Turn the ignition switch to ON.
3. Inspect the engine idling speed.
Idle speed:
610 to 710 rpm for automatic transaxle
650 to 750 rpm for manual transaxle
4. Turn the ignition switch to OFF.
5. Disconnect a tachometer.
6. Remove SST from terminal 9 (TAC).
9. INSPECT COMPRESSION
a. Warm up and stop the engine.
b. Remove the engine cover No. 1.
c. Remove the 4 ignition coils.
d. Remove the 4 spark plugs.
e. Disconnect the 4 fuel injector connectors.
f. Inspect cylinder compression pressure.
1. Insert a compression gauge into the spark plug hole.
SST 09992-00500
2. Fully open the throttle.
3. While cranking the engine, measure the compression pressure.
Compression pressured 1,300 kPa (13.3 kgf/cm2, 189 psi)
Minimum pressure: 1,000 kPa (10.2 kgf/cm2, 145 psi)
Difference between each cylinder: 100 kPa (1.0 kgf/cm2, 14 psi)
NOTICE:
- Use a fully charged battery so the engine speed can be increased to 250 rpm or more.
- Inspect the other cylinders in the same way.
- Measure the compression in as short a time possible.
4. If the cylinder compression is low, pour a light coat of engine oil into the cylinder through the spark plug hole, then inspect it again.
HINT:
- If adding oil increases the compression, the piston rings and/or cylinder bore may be worn or damaged.
- If the pressure stays low, the valve may be stuck or seated improperly, or there may be leakage from the gasket.
g. Connect the 4 fuel injector connectors.
h. Install the 4 spark plugs.
Torque: 19 Nm (194 kgf-cm, 14 ft. lbs.)
i. Install the 4 ignition coils.
j. Install the engine cover No. 1.
10. INSPECT CO/HC
HINT: The ECM properly controls the CO/HC concentration in the emission gas.
a. Start the engine.
b. Run the engine at 2,500 rpm for approximately 180 seconds.
c. Insert the CO/HC meter testing probe at least 40 cm (1.3 ft) into the tailpipe while idling.
d. Check the CO/HC concentration while idling and/or at 2,500 rpm.
If the CO/HC concentration does not comply with the regulations, troubleshoot in the order given.
- Check the heated oxygen sensor operation.
- See the table for possible causes, then inspect the applicable parts and repair them if necessary.