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.

1994 Toyota Pickup BaseFACTORY OEM SERVICE PROCEDURE

Engine Sensors: Notes

NOTE: For locations of engine sensors not covered in this article, see appropriate THEORY/OPERATION article.

KNOCK SENSOR LOCATIONS ⁽¹⁾

Model

Location

Pickup 2.4L 4WD

In Cylinder Block, Below Air Cleaner

Pickup 3.0L

On Top Of Cylinder Block, Under Intake Manifold

⁽¹⁾	Knock sensor monitors ignition knock conditions and delivers an input signal to KNK or KNK1 and KNK2 terminals of Engine Control Module (ECM). The ECM uses input signal to determine ignition timing (spark advance) and control fuel injection system.

Factory Service Tools

Use the Manual With the Right Hardware

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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.