Engine Controls - Sensor Operating Range Charts: Introduction

Sensor operating range information can help determine if a sensor is out of calibration. An out-of-calibration sensor may not set a diagnostic trouble code, but it may cause driveability problems.

NOTE: Perform all voltage tests using a Digital Volt-Ohmmeter (DVOM) with a minimum 10-megohm input impedance, unless stated otherwise in test procedure. Using an oscilloscope may provide better test results on some sensors. For oscilloscope waveforms and PCM terminal identification, see PIN VOLTAGE CHARTS article.

CAMSHAFT POSITION SENSOR RESISTANCE

Application		Ohms @ 68°F (20°C)
Maxima
Hitachi Sensor		1440-1760
Mitsubishi Sensor		2090-2550

CAMSHAFT POSITION SENSOR VOLTAGE

PCM Terminal No.

Volts At Idle ⁽¹⁾

⁽¹⁾ Voltage At 2000 RPM

Altima

2.5

2.3-2.5

40 Or 44

0.1-0.5

0.2-0.4

Frontier (4-Cylinder)

44 Or 48

0.2-0.5

0.0-0.5

2.6

2.5-2.6

Frontier (V6), Pathfinder, Quest & QX4

44 Or 48

0.3-0.5

2.5

Maxima

44 Or 48

4.2 ⁽²⁾

N/A

Sentra (1.6L)

0.1-0.4

2.5

2.4

Sentra (2.0L)

40 Or 44

0.1-0.4

41 Or 45

2.5

2.4

⁽¹⁾	Voltage measurement is approximate.

⁽²⁾	A/C volts.

CRANKSHAFT POSITION SENSOR RESISTANCE

Application

Ohms @ 77°F (25°C)

Altima

432-528

Frontier, Pathfinder, Quest & QX4

⁽¹⁾ 166.5-203.5

Maxima

470-570

Sentra

1.6L Engine (With A/T)

166.5-203.5

1.6L Engine (With M/T)

432-528

2.0L Engine

166-204

⁽¹⁾	Sensor resistance is measured at 68°F (20°C).

EGR TEMPERATURE SENSOR RESISTANCE

Temperature °F (°C)	Volts	K/Ohms
Altima & Maxima
32 (0)	4.61	680-1110
122 (50)	2.53	90-120
212 (100)	0.87	17-24
Except Altima & Maxima
32 (0)	4.81	7900-9700
122 (50)	2.82	570-700
212 (100)	0.80	80-100

ENGINE COOLANT TEMPERATURE SENSOR RESISTANCE

Temperature °F (°C)	Ohms
68 (20)	2100-2900
122 (50)	680-1000
194 (90)	236-260

HO2S HEATER RESISTANCE

Application

⁽¹⁾ Ohms @ 77°F (25°C)

Front & Rear HO2S Heater

2.3-4.3

⁽¹⁾	Measure resistance between appropriate HO2S terminals. For complete HO2S testing, see appropriate DTC test in appropriate SELF-DIAGNOSTICS article.

HO2S OPERATING RANGE VOLTAGE ⁽¹⁾

Application

Lean Volts

Rich Volts

Front HO2S

0.0-0.3

0.6-1.0

Rear HO2S

0.0-0.3

0.6-1.0

⁽¹⁾	Maintain engine speed at 2000 RPM.

INTAKE AIR TEMPERATURE SENSOR RESISTANCE

Temperature °F (°C)	Ohms
68 (20)	2100-2900
176 (80)	270-380

KNOCK SENSOR RESISTANCE

Application

Ohms @ 77°F (25°C)

Altima & Frontier

⁽¹⁾ 500,000-620,000

Except Altima & Frontier

⁽²⁾ 500,000-620,000

⁽¹⁾	Measured between knock sensor terminal No. 1 and ground.

⁽²⁾	Measured between knock sensor terminal No. 2 and ground.

MASS AIRFLOW SENSOR VOLTAGE⁽¹⁾

Application

Volts At Idle ⁽²⁾

⁽²⁾ Volts At 2500 RPM

Altima

1.2-1.5

1.9-2.3

Frontier

4-Cylinder

0.9-1.8

1.9-2.3

1.0-1.7

1.7-2.3

Maxima

1.0-1.7

1.5-2.1

Pathfinder & QX4

1.0-1.7

1.7-2.3

Quest

1.0-1.7

1.7-2.3

Sentra

1.6L

1.0-1.7

1.7-2.1

2.0L

1.3-1.7

1.8-2.4

⁽¹⁾	Values are approximate and vary with engine RPM. Voltage should be less than one volt with Key On, Engine Off (KOEO).

⁽²⁾	With engine at normal operating temperature, specified speed and no load.

POWER STEERING OIL PRESSURE SWITCH

Condition	Continuity
Steering Unloaded (Not Turning Steering Wheel)	No
Steering Loaded (Turning Steering Wheel)	Yes

TANK FUEL TEMPERATURE SENSOR RESISTANCE

Temperature °F (°C)	Ohms
68 (20)	2300-2700
122 (50)	790-900

THROTTLE POSITION (TP) SENSOR RESISTANCE

Sensor Position		Ohms @ 77°F (25°C)
Altima, Maxima, Pathfinder & QX4
Fully Open		0.5
Partly Open		0.5-4.0
Fully Closed		4.0

THROTTLE POSITION (TP) SENSOR VOLTAGE ⁽¹⁾

Application

Volts

Frontier, Quest & Sentra

Throttle Fully Closed

0.15-0.85

Throttle Fully Open

3.5-4.7

⁽¹⁾	Voltage is measured at PCM terminal No. 23 by backprobing connector with ignition on and engine off.