Engine Controls - Sensor Operating Range Charts: Introduction

NOTE: This article also applies to Infiniti I30 and QX4. For I30 coverage, refer to Maxima, unless otherwise indicated. For QX4 coverage, refer to Pathfinder, unless otherwise indicated.

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 ECM 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

ECM Terminal No.

Volts At Idle ⁽¹⁾

⁽¹⁾ Voltage At 2000 RPM

Altima

2.5

2.3-2.5

41 Or 42

0.1-0.5

0.2-0.4

Frontier & Xterra (4-Cylinder)

44 Or 48

0.2-0.5

0.0-0.5

2.6

2.5-2.6

Frontier & Xterra (V6) & Pathfinder

49 Or 53

0.3-0.5

2.5

Maxima

66 Or 76

4.2 ⁽²⁾

.3-.5

Quest

44 Or 48

0.3-0.5

2.5

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 & Xterra

⁽¹⁾ 166.5-203.5

Maxima

470-570

Quest

⁽¹⁾ 512-632

Sentra (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
Quest & Sentra
32 (0)	4.56	620-1050
122 (50)	2.25	65-94
212 (100)	0.80	11-15
Except Altima, Maxima, Quest & Sentra
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 & 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)

Except Altima, Frontier & Sentra

⁽²⁾ 500,000-620,000

Altima, Frontier & Sentra

⁽¹⁾ 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 & Xterra

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

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 (ALTIMA, MAXIMA & PATHFINDER)

Sensor Position	Ohms @ 77°F (25°C)
Fully Open	0.5
Partly Open	0.5-4.0
Fully Closed	4.0

THROTTLE POSITION (TP) SENSOR VOLTAGE

Application	Volts
Throttle Fully Closed	0.15-0.85
Throttle Fully Open	3.5-4.7