LEMON Manuals: Even more car manuals for everyone: 1960-2025
Home >> Lexus >> 2000 >> SC 400 V8-4.0L (1UZ-FE) >> Repair and Diagnosis >> Powertrain Management >> Ignition System >> Testing and Inspection
April 5, 2026: LEMON Manuals is launched! Read the announcement.

Ignition System: Testing and 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 WITH IGNITER AND SPARK TEST
Check that the spark occurs.
1. Remove the ignition coils.
2. Using a 16 mm plug wrench, remove the spark plugs.
3. Install the spark plugs to each ignition coil, and connect the ignition coil connector.
4. Disconnect the injector connector.
5. Ground the spark plug.




6. Check if spark occurs while engine is being cranked.

NOTE: To prevent gasoline from being injected from injectors during this test, crank the engine for no more than 5 - 10 seconds at time.




If the spark done not occur, do the test.

7. Using a 16 mm plug wrench, install the spark plugs.

Torque: 17.5 Nm (180 kg.cm, 13 ft.lb)

8. Reinstall the ignition coils.