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 MANUALSTOYOTA19904RUNNER 2D UTILITY, 3.0 V, STANDARDREPAIR AND DIAGNOSISENGINE PERFORMANCESYSTEMENGINE CONTROLS - TESTS W/CODES - V6CLEARING TROUBLE CODES
1990 Toyota 4Runner 2D Utility, 3.0 V, Standard
Clearing Trouble Codes
1990 Toyota 4Runner 2D Utility, 3.0 V, StandardSECTION Clearing Trouble Codes
- After repairs are performed, clear ECU memory. To clear memory, turn ignition off. Remove fuse from main fuse block for about 30 seconds or more.
- Fuse block is located in the engine compartment fuse/relay box. See CLEARING CODES table for the appropriate fuse.
- Fuse may be required to be removed longer, depending on the ambient temperature. Replace fuse and exit diagnostic mode. Trouble codes can also be cleared by disconnecting vehicle battery. However, other memory functions (clock, radio, etc.), will need to be reset.
CLEARING CODES
| Application | Fuse (Amperage) |
|---|---|
| Pickup/4Runner | EFI (15) |
RENDER: 1.0x
NO RELATED
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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.