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 diagnostic 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.

CAMSHAFT POSITION (CMP) SENSOR VOLTAGE

ECM/PCM Terminal ⁽¹⁾

⁽²⁾ Voltage

SGC Signal

5 (1 pulses/rev)

⁽¹⁾	See PIN VOLTAGE CHART S article for terminal identification.

⁽²⁾	Rotate distributor drive by hand while measuring output voltage.

CRANKSHAFT POSITION (CKP) SENSOR RESISTANCE

Terminals ⁽¹⁾

Temperature

Ohms

"A" & "B"

68°F (20°C)

950-1250

⁽¹⁾	See appropriate SYSTEM/COMPONENT TESTS article for terminal identification.

ENGINE COOLANT TEMPERATURE (ECT) SENSOR RESISTANCE

Temperature	Ohms
68°F (20°C)	2200-2700
176°F (80°C)	290-350

FUEL TANK PRESSURE SENSOR VOLTAGE

Vacuum	Voltage
0 in. Hg	2.5
2.0 in. Hg	0.5

HEATED OXYGEN SENSOR

Operating Condition	Volts
Acceleration	0.5-1.0
Deceleration	0.0-0.5

INTAKE AIR TEMPERATURE (IAT) SENSOR RESISTANCE

Application	Ohms
77°F (25°C)	30,000-36,00
185°F (85°C)	3300-3700

TP SENSOR VOLTAGE

ECM/PCM Wire Color

Closed Throttle Volts

WOT Volts

Red/Blue (3F) ⁽¹⁾

0.1-1.1

2.8-4.5

⁽¹⁾	ECM/PCM terminal pin No. in parentheses.

THROTTLE POSITION (TP) SENSOR CONTINUITY

Condition ⁽¹⁾

Continuity Between Terminals "C" & "D"

.006" (.15 mm)

Yes

.020" (.5 mm)

⁽¹⁾	Insert feeler gauge of specified thickness between throttle lever and throttle stop screw. See appropriate SYSTEM/COMPONENT TESTS article for terminal identification.