2000 Mazda MPV DXFACTORY OEM SERVICE PROCEDURE

Engine Coolant Temperature (ECT) Sensor

ENGINE COOLANT TEMPERATURE (ECT) SENSOR SPECIFICATIONS (B2500, B3000 & B4000)

Temperature °F (°C) (1) PID Voltage Ohms
50 (10) 3.52 58,750
68 (20) 3.06 37,300
86 (30) 2.62 24,270
104 (40) 2.16 16,150
122 (50) 1.70 10,970
140 (60) 1.35 7600
158 (70) 1.04 5370
176 (80) 0.80 3840
194 (90) 0.61 2800
212 (100) 0.47 2070
230 (110) 0.36 1550
248 (120) 0.28 1180
(1) Check sensor voltage using New Generation Star (49 T088 0A0) scan tool connected to Data Link Connector (DLC) 2. DLC is located under left side of instrument panel, right of steering column.
ENGINE COOLANT TEMPERATURE (ECT) SENSOR RESISTANCE (EXCEPT B2500, B3000 & B4000)

Temperature °F (°C) Ohms
Miata & Protege (1)
68 (20) 2200-2700
176 (80) 290-350
Millenia (2)
68 (20) 2200-2700
176 (80) 290-350
MPV (2)
68 (20) 2200-2800
176 (80) 290-400
626 (2)
68 (20) 35,500-39,200
176 (80) 7180-7920
(1) Measure resistance between ECT sensor terminals "A" and "B". See Fig 1 or Fig 2 .
(2) Measure resistance between ECT sensor terminals.
Fig 1: Identifying ECT Sensor Terminals (Miata)
G97I07736Courtesy of MAZDA MOTORS CORP.
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 ToolsCompare Repair QuoteQuote 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.