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.
Power Circuits
1992 Infiniti M30 2D ConvertibleSECTION Power Circuits
- Using a voltmeter, check for battery voltage between chassis ground and ECU terminals No. 46 and 109 on G20, or ECU terminal No. 58 on all other models. If battery voltage is not present, check fusible link. Fusible link also supplies power for fuel injectors.
- Turn ignition switch to ON position. Using a voltmeter, check for battery voltage between chassis ground and ECU terminals No. 36, 38 and 47 on G20 or terminals No. 45, 49, 59 and 109 on M30 and Q45. If battery voltage is not present, check fusible link and fuse "G".
- Connect voltmeter between chassis ground and ECU terminal No. 34 on G20 or terminal No. 43 on M30 and Q45. Turn ignition switch to START position. Battery voltage should be present only when ignition switch is in START position. If voltage is not present, check for blown fuse and defective ignition switch.
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.