2001 Mazda MPV ESFACTORY OEM SERVICE PROCEDURE

Engine Coolant Temperature (ECT) Sensor

ENGINE COOLANT TEMPERATURE (ECT) SENSOR RESISTANCE (EXCEPT B2300,B2500, B3000, B4000 & TRIBUTE)

Temperature °F (°C) Ohms
Miata (1)
68 (20) 2270-2740
176 (80) 290-340
Millenia & Protege (2)
68 (20) 2200-2600
176 (80) 290-340
MPV (2)
68 (20) 2200-2800
176 (80) 290-400
626 (2)
68 (20) 35,500-39,200
140 (60) 7180-7920
(1) Measure resistance between ECT sensor terminals "A" and "C". See Fig 1.
(2) Measure resistance between ECT sensor terminals.
ENGINE COOLANT TEMPERATURE (ECT) SENSOR SPECIFICATIONS (B2500, B3000, B4000 & TRIBUTE 3.0L)

Temperature °F (°C) (1) PID Voltage Ohms
50 (10) 3.51 58,750
68 (20) 3.07 37,300
86 (30) 2.60 24,270
104 (40) 2.13 16,150
122 (50) 1.70 10,970
140 (60) 1.33 7700
158 (70) 1.02 5370
176 (80) 0.78 3840
194 (90) 0.60 2800
212 (100) 0.46 2070
230 (110) 0.35 1550
248 (120) 0.27 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.
Fig 1: Identifying ECT Sensor Terminals (Miata)
G99I03106Courtesy of MAZDA MOTORS CORP.
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