Cylinder Head Temperature Sensor

WARNING: This page does not describe the selected car, but rather 9 other vehicles, including the 2003 Mazda Tribute, 2003 Mazda Protege5, 2003 Mazda Protege, 2003 Mazda MX-5 Miata, and 2003 Mazda MPV. However, it is still accessible from the selected car via links, so may be relevant.

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

482 (250)

.35

500 (260)

.33

⁽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)

Courtesy of MAZDA MOTORS CORP.

Fig 2: Identifying CHT Sensor Terminals (Tribute - 2.0L)

Courtesy of MAZDA MOTORS CORP.