Intake Air Temperature (IAT) Sensor

NOTE: IAT sensor on Protege 1.8L is part of Mass Airflow (MAF) sensor. See SYSTEM & COMPONENT TESTING - MIATA, MILLENIA, MPV, PROTEGE & 626 article.

INTAKE AIR TEMPERATURE (IAT) SENSOR SPECIFICATIONS (B2500, B3000 & B4000)

Temperature °F (°C)

⁽¹⁾ PID Voltage

⁽²⁾ 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.

⁽²⁾	Measure resistance between IAT sensor terminals.

INTAKE AIR TEMPERATURE (IAT) SENSOR RESISTANCE (MILLENIA 2.3L)

Temperature °F (°C)

⁽¹⁾ Ohms

IAT Sensor (Air Cleaner Housing)

68 (20)

2200-2700

176 (80)

290-350

IAT Sensor (Dynamic Chamber)

77 (25)

29,700-36,300

185 (85)

3330-3670

IAT Sensor (Lysolm Compressor)

212 (100)

5600-6900

⁽¹⁾	Measure resistance between IAT sensor terminals.

INTAKE AIR TEMPERATURE SENSOR RESISTANCE (MIATA, MILLENIA 2.5L, PROTEGE & 626)

Temperature °F (°C)

⁽¹⁾ Ohms

Miata

68 (20)

2090-2810

176 (80)

274-370

Millenia 2.5L

68 (20)

2200-2700

176 (80)

290-350

MPV

50 (10)

3300-4100

68 (20)

2200-2700

86 (30)

1400-1900

Protege 1.6L

50 (10)

3100-4400

68 (20)

2200-2700

86 (30)

1400-1900

Protege 1.8L

68 (20)

2200-2700

176 (80)

270-370

626

68 (20)

35,500-39,200

176 (80)

7180-7920

⁽¹⁾	Measure resistance between IAT sensor terminals.