Spark Plug: Testing and Inspection
ON-VEHICLE INSPECTIONNOTE: "Cold" and "Hot" in this section mean the temperature of the coils themselves. "Cold" is from -10 °C (14 °F) to 50 °C (122 °F) and "Hot" is from 50 °C (122 °F) to 100 °C (212 °F).
1. CHECK IGNITION COIL ASSEMBLY AND PERFORM SPARK TEST
a. Check for DTCs.
NOTE: If any DTC is present, perform troubleshooting in accordance with a procedure for that DTC.
b. Check that sparks occur.
1. Remove the ignition coils.
2. Using a 16 mm (0.63 in.) plug wrench, remove the spark plugs.
3. Install the spark plugs to each ignition coil, and connect the ignition coil connectors.
4. Disconnect the 6 injector connectors.
5. Ground the spark plugs.
6. Check if sparks occur at each spark plug while the engine is being cranked.
NOTE:
- Be sure to ground the spark plug when checking.
- Replace the ignition coil if it receives an impact.
- Do not crank the engine for more than 2 seconds.
If sparks do not occur, perform the following test:
c. Spark test flow chart.
1. Check that the wire harness side connector of ignition coil assembly is securely connector.
2. Perform spark test on each ignition coil assembly.
1. Replace ignition coil assembly with a normal one.
2. Perform spark test again.
3. Check power supply to ignition coil.
1. Turn ignition switch ON.
2. Check that there is battery positive (+) voltage at ignition coil positive (+) terminal.
4. Check resistance in VVT sensor out put voltage (see step 2).
1. Check that the wiring between VVT sensor and ECM.
5. Check resistance in crankshaft position sensor.
6. Check IGT signal from ECM.
d. Using a 16 mm (0.63 in.) plug wrench, install the spark plugs.
Torque: 20 N.m (204 kgf.cm, 13 ft.lbf)
e. Install the ignition coils.
Torque: 10 N.m (102 kgf.cm, 7 ft.lbf)
2. CHECK VVT SENSOR OUTPUT VOLTAGE
a. Turn the ignition switch to the ON position.
b. Check that the voltage between terminal VC1 and ground is 5 V.
HINT: For the terminal arrangement of the engine ECU.
c. While turning the crankshaft pulley by hand, measure the voltage between each terminal. Check that the voltage changes between the Hi range and Lo range shown in the table.
HINT: For the terminal arrangement of the engine ECU.
3. CHECK VVT SENSOR OUTPUT VOLTAGE
a. Turn the ignition switch to the ON position.
b. Check that the voltage between terminal VC1 and ground is 5 V.
HINT: For the terminal arrangement of the engine ECU.
c. While turning the crankshaft pulley by hand, measure the voltage between each terminal. Check that the voltage changes between the Hi range and Lo range shown in the table.
HINT: For the terminal arrangement of the engine ECU.