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)

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.

FUEL TEMPERATURE SENSOR RESISTANCE (M30 & Q45) ⁽¹⁾

Temperature - °F (°C)

Ohms

68 (20)

2100-2900

122 (50)

680-1000

176 (80)

300-330

⁽¹⁾	Measure resistance between sensor terminals at pressure regulator.

HEATED OXYGEN SENSOR VOLTAGE ⁽¹⁾

Condition

Volts

Lean

0-0.3

Rich

0.6-1.0

⁽¹⁾	Measure voltage between oxygen sensor terminal and ground, voltage should continuously change. Measure heater resistance between terminals "A" and "C" at sensor. Resistance should be 3-1000 ohms.

CLOSED & WIDE OPEN THROTTLE SWITCH CONTINUITY ⁽¹⁾ (G20) ⁽²⁾

Position

Reading

Closed Throttle

Blue/Orange & White Green

Wide Open Throttle

Blue/Orange & Blue Red

⁽¹⁾	Continuity should be present between terminals identified by wire color.

⁽²⁾	Applicable to A/T vehicles produced from serial No. 450021 and later.

CLOSED THROTTLE POSITION SWITCH CONTINUITY (J30 & Q45) ⁽¹⁾

Position

Reading

Closed Throttle

Continuity

Open Throttle

No Continuity

⁽¹⁾	Check continuity between terminals No. 2 and 3 at sensor. See Fig 1 .

THROTTLE POSITION SENSOR RESISTANCE ⁽¹⁾

Position

Ohms

G20

Closed Throttle

2000

Partially Open

2000-10,000

Wide Open Throttle

10,000

J30

Closed Throttle

1700

Partially Open

1700-10500

Wide Open Throttle

10500

Q45

Closed Throttle

700

Partially Open

700-5000

Wide Open Throttle

5000

⁽¹⁾	Measure resistance between terminals No. 4 and 5 at sensor. See Fig 1 .

MASS AIRFLOW SENSOR VOLTAGE (LOW RPM) ⁽¹⁾

Application

Terminal No

Volts

G20

"A"

1.3-1.7

J30

"B"

1.0-1.4

Q45

"1"

1.0-1.4

⁽¹⁾	Measure voltage between ground and indicated airflow meter terminal with engine idling at normal operating temperature.

MASS AIRFLOW SENSOR VOLTAGE (HIGH RPM) ⁽¹⁾

Application

Terminal No

Volts

G20

"A"

1.7-2.1

J30

"B"

1.4-1.9

Q45

"1"

1.4-1.9

⁽¹⁾	Measure voltage between ground and indicated airflow meter terminal with engine running at 2000 RPM at normal operating temperature.

Fig 1: Throttle Position Sensor/Closed Throttle Switch Terminal ID

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