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Engine Controls - Sensor Operating Range Charts 2.4L: 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 wiring diagram in WIRING DIAGRAMS article.
CAMSHAFT POSITION SENSOR VOLTAGE TEST (1)

Application Wire Color (1-Degree Signal) Wire Color (120/180-Degree Signal)
240SX (2) (3) Black White
(1) Measure voltage between indicated wire color terminals.
(2) Voltage should fluctuate between zero and 5 volts.
(3) Black wire at end of connector is for ground; measure voltage at other Black wire.
CLOSED THROTTLE POSITION SWITCH CONTINUITY

Application RPM
240SX 750-1050
CRANKSHAFT POSITION SENSOR RESISTANCE @ 77°F (25°C)

Application Ohms
240SX (1) 166-204
(1) On 240SX, sensor resistance is measured at 68°F (20°C).
ENGINE (COOLANT) TEMPERATURE SENSOR RESISTANCE

Temperature - °F (°C) Ohms
68 (20) 2100-2900
122 (50) 680-1000
176 (80) 300-330
194 (90) 236-260
EXHAUST GAS TEMPERATURE SENSOR RESISTANCE

Temperature - °F (°C) Ohms
212 (100) 76,770-93,830
INHIBITOR SWITCH CONTINUITY

Lever Position 8-Pin Connector Terminals No. 2-Pin Connector Terminals No.
"P" 3 & 4 1 & 2
"R" 3 & 5 N/A
"N" 3 & 6 1 & 2
"D" 3 & 7 N/A
"2" 3 & 8 N/A
"1" 3 & 9 N/A
INTAKE AIR TEMPERATURE SENSOR RESISTANCE

Temperature - °F (°C) Ohms
68 (20) 2100-2900
122 (50) 600-1000
KNOCK (DETONATION) SENSOR RESISTANCE @ 77°F (25°C)

Application Ohms
240SX Continuity To Ground
MASS AIRFLOW SENSOR VOLTAGE TEST (1)

Application (2) Volts With KOEO Volts At Idle
240SX Less Than 1.0 1.3-1.7
(1) Values are approximate and vary with engine RPM.
(2) Key On, Engine Off.
OXYGEN SENSOR OPERATING RANGE

Application (1) Min. Volts @ RPM (2) Max. Volts @ RPM
Front O2S 0.35 @ 2000 0.6 @ 2000
Rear HO2S 0.55 @ 4000 0.6 @ 4000
(1) Minimum voltage should be below specified value at least once.
(2) Maximum voltage should be above specified value at least once.
OXYGEN SENSOR HEATER ELEMENT RESISTANCE @ 77°F (25°C)

Application Ohms
Rear HO2S 5.2-8.2
POWER STEERING OIL PRESSURE SWITCH

Condition Continuity
Steering Unloaded (Not Turning Steering Wheel) No
Steering Loaded (Turning Steering Wheel) Yes
THROTTLE POSITION SENSOR RESISTANCE TEST

Application Wire Colors k/Ohms
240SX Black & White 1.0-10.0
VEHICLE SPEED SENSOR

Application (1) AC Voltage
240SX 0.5
(1) Measured while rotating sensor shaft by hand, check AC voltage across sensor connector terminals.
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