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.
1988 Toyota 4Runner Base, AutomaticFACTORY OEM SERVICE PROCEDURE
Land Cruiser
- Raise one rear wheel off the ground and secure vehicle. Release parking brake and place transmission in Neutral. Disconnect wiring connector from EFI ECU, located behind glove box.
- Attach ohmmeter positive lead to connector terminal and negative lead to ground. See Fig 1. Turn rear wheel and monitor ohmmeter. Ohmmeter needle should deflect consistently.
- If ohmmeter does not deflect, check that speed sensor terminals at rear of speedometer are properly connected. If connection is okay, replace speedometer assembly.
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.
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