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Home >> Nissan-Datsun >> 1993 >> Sentra SE-R, Standard >> Repair and Diagnosis >> Engine Performance >> Sensor Range Charts >> Engine Controls - Sensor Operating Range Charts >> Introduction
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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 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. To identify ECU terminals, see appropriate wiring diagram in appropriate WIRING DIAGRAMS article.
AIR TEMPERATURE SENSOR (1)

Temperature - °F (°C) Ohms
Pickup 2.4L
68 (20) 2100-2900
176 (80) 270-380
(1) Measure resistance between sensor terminals.
MASS AIRFLOW SENSOR (KEY ON, ENGINE OFF) (1)

Application Terminal No. Volts
Altima 16 0.2
Maxima 27 Less Than 0.4
NX & Sentra
1.6L 16 Less Than 1.0
2.0L 16 Less Than 1.0
Pathfinder & Pickup 3.0L 16 Less Than 1.0
Quest 16 Less Than 0.5
240SX 16 Approx. 0.2
300ZX 27 Approx. 0.8
(1) Measure voltage between ground and indicated ECU terminal with ignition switch in ON position, engine not running.
MASS AIRFLOW SENSOR (ENGINE IDLING) (1)

Application Terminal No. Volts
Altima 16 0.8-0.3
Maxima 27 1.0-1.3
NX & Sentra
1.6L 16 0.7-1.1
2.0L 16 1.3-1.7
Pathfinder & Pickup 3.0L 16 1.5-2.0
Quest 16 1.0-1.7
240SX 16 1.0-1.4
300ZX 27 0.8-1.5
(1) Measure voltage between ground and indicated ECU terminal with engine idling at normal operating temperature.
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 boiling water, and measure resistance across sensor terminals.
FUEL TEMPERATURE SENSOR RESISTANCE (300ZX) (1)

Temperature - °F (°C) Ohms
68 (20) 2100-2900
122 (50) 680-1000
176 (80) 300-330
(1) Measure resistance between sensor terminals.
OXYGEN SENSOR VOLTAGE (1)

Condition Volts
Lean 0.1
Rich 1.0
(1) With engine running at normal operating temperature, measure voltage between oxygen sensor connector terminal (center terminal on heated oxygen sensors) and ground.
THROTTLE POSITION SENSOR RESISTANCE (1)

Position Ohms
Altima & 240SX
Closed Throttle 2000
Partially Open 2000-10,000
Wide Open Throttle 10,000
Maxima, Pathfinder, Pickup, Quest & 300ZX
Closed Throttle 1000
Partially Open 1000-9000
Wide Open Throttle 9000
NX & Sentra
Closed Throttle 1000
Partially Open 1000-9000
Wide Open Throttle 9000
(1) Measure resistance between terminals "B" (White wire) and "C" (power wire) on sensor. Black wire is ground circuit (not used on this test).
THROTTLE POSITION SENSOR VOLTAGE (1)

Application Terminal No. Volts
Altima, Pathfinder, Pickup 3.0L & Quest 20 0.4-4.0
Maxima
VE30DE (VIN E) 38 0.4-4.0
VG30E (VIN H) 38 0.5-4.2
NX, Sentra & 240SX 20 0.4-5.0
Pickup 2.4L 20 0.5-4.0
300ZX 38 0.4-4.0
(1) Turn ignition on. Measure voltage between ground and indicated ECU terminal. Observe voltage while opening and closing throttle valve.
VEHICLE SPEED SENSOR CONTINUITY

Application Reading
All Models (1)
(1) Check continuity between sensor terminals while turning wheel. Ohmmeter reading should fluctuate between continuity and infinity.
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