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 Mazda 323 Base, 2D HatchbackFACTORY OEM SERVICE PROCEDURE

Throttle Sensor (Turbo)

Remove rubber boot from throttle sensor. See Fig 1 . With ignition on, check voltage between each terminal and ground. See THROTTLE SENSOR VOLTAGE table. Repeat test with throttle wide open.

Fig 1: Throttle Sensor Connector Identification

Courtesy of MAZDA MOTORS CORP.

THROTTLE SENSOR VOLTAGE (323 TURBO)

Termina Codes	Closed Volts	Wide Open Volts
A	0.3-0.7	Approx. 4.0
B	Less Than 1.5	Less Than 1.5
C	4.5-5.5	4.5-5.5
D	Less Than 1.5	Approx. 12.0

If not correct at terminal D only, check throttle sensor adjustment. If not correct at terminals A, B or C, check resistance. If resistance is okay, check voltage at ECU connector terminals No. 2A, 2C and 2E.

THROTTLE SENSOR RESISTANCE (323 TURBO)

Terminal	Closed Throttle	Wide Open Throttle
A-B	Approx. 500 ohms	Approx. 4500 ohms
B-C	3000-7000 ohms	7000

NOTE: All procedures are made with engine at normal operating temperature.

Factory Service Tools

Use the Manual With the Right Hardware

Pair factory procedures with proven DIY tools so the instructions are easier to execute.

Disclosure: Verified tool recommendations may earn an affiliate commission at no cost to you.

Shop Manual-Ready Tools Compare Repair Quote Quote Shield Pro

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.

Rather have a pro handle this?

A certified mobile mechanic comes to your home or office. They bring the tools, you stay comfortable. No tow truck, no waiting room, no surprises.

Comes to youSame-day available12-month warranty

Get a Free Quote

No obligation. See pricing before you book.