Engine Controls - Sensor Operating Range Charts: Introduction

NOTE: For sensor operating range charts on I30, refer to Maxima in Nissan SENSOR OPERATING RANGE CHARTS article. For sensor operating range charts on QX4, refer to Pathfinder in Nissan SENSOR OPERATING RANGE CHARTS article.

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

NOTE: For sensors not listed, see appropriate DTC test in appropriate SELF-DIAGNOSTICS article.

NOTE: Unless stated otherwise in test procedure, perform all voltage tests using a Digital Volt-Ohmmeter (DVOM) with a minimum 10-megohm input impedance.

CAMSHAFT POSITION (CMP) SENSOR VOLTAGE

Application

Specification

G20

POS

Idle

⁽¹⁾ About 2.6 Volts

2000 RPM

⁽¹⁾ About 2.5 Volts

REF

Idle

⁽²⁾ 0.1-0.4 Volts

2000 RPM

⁽²⁾ 0.1-0.4 Volts

Q45

POS

Idle

⁽³⁾ About 2.5 Volts

2000 RPM

⁽³⁾ About 2.4 Volts

REF

Idle

⁽⁴⁾ About 0.6-1.0 Volts

2000 RPM

⁽⁴⁾ About 0.8-0.9 Volts

⁽¹⁾	Measured between ground and ECM terminal No. 85 by backprobing.

⁽²⁾	Measured between ground and ECM terminal No. 66 or 75 by backprobing.

⁽³⁾	Measured between ground and ECM terminal No. 59 by backprobing.

⁽⁴⁾	Measured between ground and ECM terminal No. 55 or 58 by backprobing.

CRANKSHAFT POSITION (CKP) SENSOR RESISTANCE

Application	Ohms @ 68°F (20°C)
G20	166-204
Q45	166.5-203.5

ENGINE COOLANT TEMPERATURE (ECT) SENSOR SPECIFICATIONS

Temperature °F (°C)

Volts ⁽¹⁾

Resistance Ohms

-10 (14)

4.4

7000-11,400

68 (20)

3.5

2100-2900

122 (50)

2.2

680-1000

194 (90)

1.0

236-260

⁽¹⁾	Measured between ground and ECM terminal No. 70 (on G20), or No. 67 (on Q45) by backprobing.

EGR TEMPERATURE SENSOR SPECIFICATIONS

Application

Volts

Resistance K/Ohms

G20

32°F (0°C)

4.56 ⁽¹⁾

620-1050

122°F (50°C)

2.25 ⁽¹⁾

65-94

212°F (100°C)

0.59 ⁽¹⁾

11-15

Q45

32°F (0°C)

4.61 ⁽²⁾

680-1110

122°F (50°C)

2.53 ⁽²⁾

92-120

212°F (100°C)

0.87 ⁽²⁾

17-24

⁽¹⁾	Measured between ground and ECM terminal No. 72 by backprobing.

⁽²⁾	Measured between ground and ECM terminal No. 63 by backprobing.

FUEL LEVEL SENSOR RESISTANCE (G20)

Float Position

⁽¹⁾ Ohms

Full ⁽²⁾

4-6

1/2

30-34

Empty ⁽²⁾

80-83

⁽¹⁾	Approximate resistance.

⁽²⁾	When float rod is in contact with stop.

FUEL TANK TEMPERATURE SENSOR SPECIFICATIONS

Temperature °F (°C)

Volts ⁽¹⁾

Resistance Ohms

68 (20)

3.5

2300-2700

122 (50)

2.2

790-900

⁽¹⁾	Measured between ground and ECM terminal No. 82 (on G20), or No. 91 (on Q45) by backprobing.

HEATED OXYGEN SENSOR (HO2S) VOLTAGE ⁽¹⁾

Condition

Volts

Lean

0-0.3

Rich

0.6-1.0

⁽¹⁾	Reading displayed on an OBD-II scan tool. For complete HO2S sensor testing, see appropriate DTC test in appropriate SELF-DIAGNOSTICS article.

HEATED OXYGEN SENSOR (HO2S) HEATER RESISTANCE @ 77°F (25°C)

Application

Ohms

Front & Rear

⁽¹⁾ 2.3-4.3

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

INTAKE AIR TEMPERATURE (IAT) SENSOR SPECIFICATIONS

Temperature °F (°C)

Volts ⁽¹⁾

Resistance Ohms

68 (20)

3.50

2100-2900

176 (80)

1.23

270-380

⁽¹⁾	Measured between ground and ECM terminal No. 64 (on G20), or No. 69 (on Q45) by backprobing.

MASS AIRFLOW (MAF) SENSOR VOLTAGE SPECIFICATIONS ⁽¹⁾

Application

Volts

G20

Key On, Engine Off

⁽²⁾ Less Than 1.0

Idle

⁽²⁾ 1.3-1.7

2500 RPM

⁽²⁾ 1.8-2.4

Q45

Key On, Engine Off

⁽³⁾ Less Than 1.0

Idle

⁽³⁾ 1.0-1.7

2500 RPM

⁽³⁾ About 2.1

⁽¹⁾	With engine at normal operating temperature.

⁽²⁾	Measured between ground and ECM terminal No. 61 by backprobing.

⁽³⁾	Measured between ground and ECM terminal No. 65 by backprobing.

THROTTLE POSITION (TP) SENSOR VOLTAGE

Application

Volts

G20

Completely Released

⁽¹⁾ 0.2-0.8

Partially Released

⁽¹⁾ 0.2-0.8 To 3.5-4.5

Completely Depressed

⁽¹⁾ 3.5-4.5

Q45

Completely Released

⁽²⁾ 0.15-0.85

Partially Released

⁽²⁾ 0.15-0.85 To 3.5-4.7

Completely Depressed

⁽²⁾ 3.5-4.7

⁽¹⁾	Measured between ground and ECM terminal No. 92 by backprobing.

⁽²⁾	Measured between ground and ECM terminal No. 63 by backprobing.

SECONDARY TP SENSOR RESISTANCE (Q45)

Secondary Throttle Valve Position	Ohms @ 77°F (25°C)
Fully Open	About 5000
Partially Open	600-4000
Fully Closed	About 600