2003 Mazda MPV ESFACTORY OEM SERVICE PROCEDURE

Cylinder Head Temperature Sensor

CYLINDER HEAD TEMPERATURE (CHT) SENSOR SPECIFICATIONS (B2300 & TRIBUTE 2.0L)

Temperature °F (°C) (1) Volts (2) Ohms
-40 (-40) 4.89 965,808
-22 (-30) 4.81 513,019
-4 (-20) 4.67 283,664
14 (-10) 4.45 162,584
32 (0) 4.14 96,255
50 (10) 3.73 59,175
68 (20) 3.26 37,387
86 (30) 2.74 24,215
104 (40) 2.23 16,043
122 (50) 1.76 10,850
140 (60) 1.36 7487
158 (70) 1.04 5268
176 (80) (3) .79 Or 3.99 3775
185 (85) (3) .69 Or 3.86 3215
194 (90) (3) .60 Or 3.71 2750
203 (95) (3) .53 Or 3.56 2361
212 (100) (3) .46 Or 3.41 2034
230 (110) 3.07 1523
248 (120) 2.74 1155
266 (130) 2.41 887
284 (140) 2.10 689
302 (150) 1.81 542
320 (160) 1.55 430
338 (170) 1.33 345
356 (180) 1.13 279
374 (190) .96 228
392 (200) .82 188
410 (210) .70 155
428 (220) .60 130
446 (230) .51 109
464 (240) .44 92
482 (250) .35 78
500 (260) .33 67
(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.
(2) Measure resistance between cylinder head temperature sensor terminals. See Fig 1 or Fig 2 .
(3) At this temperature, there is a voltage overlap zone where it is possible to have either a cold end (low voltage) or hot end (high voltage) reading at the same temperature. Either voltage specification listed is correct.
Fig 1: Identifying CHT Sensor Terminals (B2300)
G00250869Courtesy of MAZDA MOTORS CORP.
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