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.

1999 Infiniti QX4FACTORY OEM SERVICE PROCEDURE

Throttle Position Switch

NOTE: When testing throttle position switch, measure continuity between specified terminals. See Fig 1.

CLOSED THROTTLE POSITION SWITCH SPECIFICATIONS

Application

Terminals No.

⁽¹⁾ Ohms

All Models

Closed Throttle

5 & 6

Continuity

Open Throttle

5 & 6

No Continuity

⁽¹⁾	With ignition off.

WOT POSITION SWITCH SPECIFICATIONS

Application

Terminals No.

⁽¹⁾ Ohms

All Models

Closed Throttle

4 & 5

No Continuity

Open Throttle

4 & 5

Continuity

⁽¹⁾	With ignition off.

Fig 1: Identifying TP Sensor Connector Terminals

Courtesy of NISSAN MOTOR CO., U.S.A.

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.