Sensor Range Charts

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

COOLANT TEMPERATURE SENSOR RESISTANCE ⁽¹⁾

Temperature - °F (°C)

Ohms

68 (20)

2100-2900

122 (50)

680-1000

176 (80)

G20

236-260

J30 & Q45

300-330

⁽¹⁾	Measure resistance across sensor terminals.

EGR TEMPERATURE SENSOR RESISTANCE ⁽¹⁾

Temperature - °F (°C)

Ohms

212 (100)

76,770-93,830

⁽¹⁾	Heat sensor in water and measure resistance across sensor terminals.

HEATED OXYGEN SENSOR (HO2S) VOLTAGE ⁽¹⁾

Condition

Volts

G20

⁽²⁾

⁽¹⁾	Measure voltage between HO2S center terminal and ground, voltage should continuously change.

⁽²⁾	Information is not available from manufacturer.

HEATED OXYGEN SENSOR (HO2S) RESISTANCE ⁽¹⁾

Condition

Ohms

Front ⁽²⁾

3.3-6.3

Rear ⁽²⁾

5.2-8.2

⁽¹⁾	Measure resistance between HO2S outer terminals.

⁽²⁾	Continuity should not exist between center terminal and outer terminals.

THROTTLE POSITION SENSOR RESISTANCE

Application

⁽¹⁾ Ohms

G20 ⁽²⁾

Completely Released

1000

Partially Released

1000-10,000

Completely Depressed

10,000

⁽¹⁾	Approximate values are given.

⁽²⁾	Check resistance between terminal "b" (White wire) and "c"(Red/Yellow wire).

MASS AIRFLOW SENSOR VOLTAGE SPECIFICATIONS ⁽¹⁾

Application

⁽²⁾ Key On Volts

Engine Running Volts

G20 ⁽³⁾

0-1.0

1.3-1.7

⁽¹⁾	Engine at normal operating temperature.

⁽²⁾	Engine off.

⁽³⁾	Voltage is measured between terminal "a" and ground. See Fig 1 .

Fig 1: DTC 12, Checking MAF Sensor (G20)

Courtesy of NISSAN MOTOR CO., U.S.A.