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.
Ignition Switch Continuity Test
For Land Cruiser, see AIR BAG RESTRAINT SYSTEM .
For Lexus LX450, see AIR BAG RESTRAINT SYSTEM .
- Disconnect negative battery cable. Remove driver side lower instrument panel cover. Remove upper and lower steering column covers if needed. Locate ignition switch wiring harness 10-pin connector. See Fig 1.
- With ignition switch in LOCK position, there should be no continuity between any terminals. With ignition switch in ACC position, there should be continuity between terminals No. 7 and 9. With ignition switch in ON position, there should be continuity between terminals No. 3 and 4, and between terminals No. 6, 7 and 9. With ignition switch in START position, there should be continuity between terminals No. 2, 3 and 4, and between terminals No. 6, 9 and 10. If continuity is not as specified, replace switch.
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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.
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