Sensor Operating Range Charts

CAMSHAFT SENSOR RESISTANCE

Application

Ohms

Cold ⁽¹⁾

835-1400

⁽¹⁾	Sensor temperature of 14-122°F (-10-50°C).

ENGINE COOLANT TEMPERATURE (ECT) SENSOR RESISTANCE

EGR GAS TEMPERATURE SENSOR RESISTANCE

NOTE: Intake Air Temperature (IAT) sensor is part of volume airflow sensor.

INTAKE AIR TEMPERATURE (IAT) SENSOR RESISTANCE ⁽¹⁾

Ambient Temp. °F (°C)

Ohms

-4 (-20)

10,000-20,000

32 (0)

4000-7000

68 (20)

2000-3000

104 (40)

900-1300

140 (60)

400-700

⁽¹⁾	Measure resistance between terminals THA and E2 of VAF sensor.

IDLE AIR CONTROL (IAC) VALVE RESISTANCE ⁽¹⁾

Application

Ohms

SC300

10-30

⁽¹⁾	Measure resistance between terminal B1 and terminals S1 and S3. Measure resistance between terminal B2 and terminals S2 and S4.

KNOCK SENSOR RESISTANCE ⁽¹⁾

Terminal

Ohms

Terminal To Sensor Body

Infinity (No Continuity)

⁽¹⁾	Replace sensor if continuity exists.

OXYGEN SENSOR HEATER RESISTANCE ⁽¹⁾

Application

Ohms @ 68°F (20°C)

SC300

11-16

⁽¹⁾	Measure resistance between terminals +B and HT of oxygen sensor 4-pin connector. See Fig 1.

Fig 1: Measuring Oxygen Sensor Heater Resistance (SC300)