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 Toyota 4Runner BaseFACTORY OEM SERVICE PROCEDURE
Engine Immobilizer DTCS
ENGINE IMMOBILIZER DIAGNOSTIC TROUBLE CODE (DTC) IDENTIFICATION
| DTC | Description |
|---|---|
| DTC B2785/99, B2786/99 | IG SWITCH ON/OFF MALFUNCTION |
| DTC B2791/99 | KEY UNLOCK WARNING SW OFF MALFUNCTION |
| DTC B2795/99 | UNMATCHED KEY CODE |
| DTC B2796/99 | NO COMMUNICATION IN IMMOBILISER SYSTEM |
| DTC B2797/99 | COMMUNICATION MALFUNCTION NO. 1 |
| DTC B2798/99 | COMMUNICATION MALFUNCTION NO. 2 |
Factory Service Tools
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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.