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.
2002 Lexus ES 300FACTORY OEM SERVICE PROCEDURE
On-Vehicle Inspection
NOTE:
"Cold" and "Hot" in these sentences express 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).
- Inspect ignition coil and spark test.
- Confirm DTC.NOTE: If DTC is indicated, carry out troubleshooting in accordance with the procedure on the following DTC.
- Check that the spark occurs.
- Remove the intake air surge tank. See VALVE CLEARANCE .
- Remove the ignition coils.
- Using a 16mm (0.63 in) plug wrench, remove the all spark plugs.
- Install the spark plugs to each ignition coils, and connect the ignition coil connectors.
- Disconnect the all injector connectors.
- Ground the spark plugs.
- Check if spark occurs while engine is being cranked.
NOTE:- Be sure to ground the spark plug, when checking.
- Replace the ignition coil when it is given an impact.
- Do not crank the engine for more than 2 seconds.
If the spark does not occur, do the test as follow.
- Using a 16 mm (0.63 in.) plug wrench, install the spark plugs.
Torque: 18 N.m (184 kgf.cm, 13 ft.lbf)
- Install the ignition coils.
Torque: 8.0 N.m (82 kgf.cm, 71 in.lbf)
- Confirm DTC.
Factory Service Tools
Use the Manual With the Right Hardware
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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.
