Safety Warning
DIY auto repair can cause serious injury, fire, or vehicle damage. These guides are for informational purposes only. Always follow OEM torque specs, wear PPE, and consult a certified mechanic if you are unsure. You are solely responsible for your safety.
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HOMESERVICE MANUALSSCION2006XB L4-1.5L (1NZ-FE)REPAIR AND DIAGNOSISPOWERTRAIN MANAGEMENTIGNITION SYSTEMSPARK PLUGTESTING AND INSPECTION
2006 Scion xB L4-1.5L (1NZ-FE)
Spark Plug: Testing and Inspection
2006 Scion xB L4-1.5L (1NZ-FE)SECTION Testing and Inspection
ON-VEHICLE INSPECTION
NOTE: The terms "cold" and "hot" refer to the temperature of the coils. "Cold" means approximately -10 to 50 degrees C (14 to 122 degrees F). "Hot" means approximately 50 to 100 degrees C (122 to 212 degrees F).
INSPECT SPARK PLUG
a. Remove the ignition coils.
b. Using a 16 mm plug wrench, remove the 4 spark plugs.
c. Clean the spark plugs.
If the electrode has traces of wet carbon, clean the electrode with a spark plug cleaner and then dry it.
Standard air pressure: 588 kPa (6 kgf/sq.cm, 85 psi)
Standard duration: 20 seconds or less
d. Check the spark plug for any damage on its threads and insulator.
If there is damage, replace the spark plug. If not, reinstall the spark plug.
e. Inspect and adjust the electrode gap.
Standard electrode gap: 0.7 to 0.8 mm (0.028 to 0.031 in.)
f. Using a 16 mm plug wrench, install the 4 spark plugs.
Torque: 18 N.m (184 kgf.cm, 13 ft.lbf)
g. Install the ignition coils.
NOTE: The terms "cold" and "hot" refer to the temperature of the coils. "Cold" means approximately -10 to 50 degrees C (14 to 122 degrees F). "Hot" means approximately 50 to 100 degrees C (122 to 212 degrees F).
INSPECT SPARK PLUG
a. Remove the ignition coils.
b. Using a 16 mm plug wrench, remove the 4 spark plugs.
c. Clean the spark plugs.
If the electrode has traces of wet carbon, clean the electrode with a spark plug cleaner and then dry it.
Standard air pressure: 588 kPa (6 kgf/sq.cm, 85 psi)
Standard duration: 20 seconds or less
d. Check the spark plug for any damage on its threads and insulator.
If there is damage, replace the spark plug. If not, reinstall the spark plug.
e. Inspect and adjust the electrode gap.
Standard electrode gap: 0.7 to 0.8 mm (0.028 to 0.031 in.)
f. Using a 16 mm plug wrench, install the 4 spark plugs.
Torque: 18 N.m (184 kgf.cm, 13 ft.lbf)
g. Install the ignition coils.
RENDER: 1.0x
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When to See a Mechanic
Stop DIY work and contact a certified mechanic immediately if any of the following apply:
- • You smell fuel, burning insulation, or see smoke.
- • Brakes feel soft, pull hard to one side, or make grinding noises.
- • The engine overheats, stalls repeatedly, or misfires under load.
- • You are missing required tools, torque specs, or safe lifting equipment.
- • You are not confident in the next step or safety outcome.