Cylinder Head Temperature Sensor - B2300 & Tribute 2.0L

WARNING: This page is about a different car, the 2003 Mazda Tribute, 2003 Mazda B4000, 2003 Mazda B3000, and 2003 Mazda B2300. However, it is still accessible from the selected car via links, so may be relevant.

Cylinder Head Temperature (CHT) sensor uses a 5 volt reference voltage during engine operation. To check CHT signal voltage, backprobe between signal terminal and ground with engine running. To check sensor resistance, disconnect sensor connector and measure resistance between sensor terminals. For CHT sensor specifications, see CYLINDER HEAD TEMPERATURE SENSOR SPECIFICATIONS (B2300 & TRIBUTE 2.0L) table. For additional diagnostic testing, refer to appropriate SELF-DIAGNOSTICS article.

CYLINDER HEAD TEMPERATURE 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-2 is located under left side of instrument panel, right of steering column.

⁽²⁾	Measure resistance between cylinder head temperature sensor terminals.

⁽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.