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.
1985 Toyota 4Runner Base, AutomaticFACTORY OEM SERVICE PROCEDURE
Carbureted Pickup
- Jack up and support one rear wheel off ground. Release parking brake. Place shift lever in neutral position.
- Unplug wiring connector from computer. Computer is located on left side of cowl on Pickup.
- Test "ON-OFF" cycles of speed sensor using an ohmmeter. See Fig 1. Insert a 10 ohm resistor in series with positive ohmmeter lead and insert lead in rear of connector. Connect negative terminal to ground.
- Turn wheel slowly, checking to see that ohmmeter needle deflects consistently. If ohmmeter needle does not deflect, check that sensor leads are firmly connected to rear of speedometer. If connections are 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.