Engine Controls - Sensor Operating Range Charts 3.0L: 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 RESISTANCE @ 68°F (20°C)

Application	Ohms
Hitachi Sensor	1440-1760
Mitsubishi Sensor	2090-2550

CLOSED THROTTLE POSITION SWITCH CONTINUITY

Application	RPM
Maxima	700-1000

CRANKSHAFT POSITION SENSOR RESISTANCE @ 77°F (25°C)

Application	Ohms
Maxima	440-570

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

FUEL TEMPERATURE SENSOR RESISTANCE

Temperature - °F (°C)	Ohms
68 (20)	2300-2700
122 (50)	790-900

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

KNOCK (DETONATION) SENSOR RESISTANCE @ 77°F (25°C)

Application	Ohms
Maxima	Continuity To Ground

MASS AIRFLOW SENSOR VOLTAGE TEST ⁽¹⁾

Application

Volts ⁽²⁾ With KOEO

Volts At Idle

Maxima

Less Than 1.0

1.0-1.7

⁽¹⁾	Values are approximate and vary with engine RPM.

⁽²⁾	Key On, Engine Off.

OXYGEN SENSOR OPERATING RANGE

Application

⁽¹⁾ Min. Voltage @ RPM

⁽²⁾ Max. Voltage @ RPM

Rear HO2S

⁽³⁾ 0.55 @ 6000

N/A

⁽¹⁾	Minimum voltage should be below specified value at least once.

⁽²⁾	Maximum voltage should be above specified value at least once.

⁽³⁾	Measured while increasing engine speed to 6000 RPM under no load or at idle.

OXYGEN SENSOR HEATER ELEMENT RESISTANCE @ 77°F (25°C)

Application	Ohms
Front HO2S	2.3-4.3
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
Maxima	Black & White	0.5-4.0

VEHICLE SPEED SENSOR

Application

⁽¹⁾ AC Voltage

Maxima

0.5

⁽¹⁾	Measured while rotating sensor shaft by hand, check AC voltage across sensor connector terminals.