Sensor Range Charts

COOLANT TEMPERATURE SENSOR RESISTANCE

Temperature °F (°C)

⁽¹⁾ Ohms

0 (-18)

25,000

20 (-7)

13,500

40 (4)

7500

70 (21)

3400

100 (38)

1800

160 (71)

450

212 (100)

185

⁽¹⁾	Measure resistance across disconnected sensor terminals.

CRANKSHAFT POSITION SENSOR RESISTANCE

Application

⁽¹⁾ Ohms

Trooper

900-1200

⁽¹⁾	Measure resistance between White wire and White/Red wire terminals.

MAP SENSOR VOLTAGE

Throttle Position

⁽¹⁾ Volts

Closed

1-1.5

Wide Open

4.0-4.5

⁽¹⁾	Measure voltage at Gray wire and Gray/Red wire terminals with ignition on.

MAT SENSOR RESISTANCE

Temperature °F (°C)

⁽¹⁾ Ohms

0 (-18)

25,000

20 (-7)

13,500

40 (4)

7500

70 (21)

3400

100 (38)

1800

160 (71)

450

212 (100)

185

⁽¹⁾	Measure resistance across disconnected sensor terminals.

OXYGEN SENSOR VOLTAGE ⁽¹⁾

Condition

Volts

Lean

0.1

Rich

1.0

⁽¹⁾	Test at normal operating temperature.

OXYGEN SENSOR HEATING ELEMENT RESISTANCE ⁽¹⁾

Application

⁽²⁾ Ohms

Trooper

3.5-14.3

⁽¹⁾	Resistance will vary with temperature change.

⁽²⁾	Measure resistance between Black wire and White/Red wire terminals.

THROTTLE POSITION SENSOR VOLTAGE ⁽¹⁾

Position

⁽²⁾ Volts

Closed Throttle

0.5

Open Throttle

5.0

⁽¹⁾	For terminal locations, see appropriate article; For Trooper DOHC models, see: WIRING DIAGRAMS - DOHC For Trooper SOHC models, see: WIRING DIAGRAMS - SOHC

⁽²⁾	Voltage should increase smoothly from closed to wide open throttle.

TRANSMISSION TEMPERATURE SENSOR RESISTANCE

Temperature °F (°C)

⁽¹⁾ Ohms

32 (0)

65,000

68 (20)

25,000

176 (80)

2,500

248 (120)

780

302 (150)

370

⁽¹⁾	Measure resistance across disconnected sensor terminals.

NOTE: To test vehicle speed sensor, see ENGINE SENSORS & SWITCHES in appropriate article;

For Trooper DOHC, see: SYSTEM/COMPONENT TESTS - DOHC
For Trooper SOHC, see: SYSTEM/COMPONENT TESTS - SOHC

VEHICLE SPEED SENSOR CONTINUITY ⁽¹⁾

Application

⁽²⁾ Continuity

All Models

4 Changes Per Revolution

⁽¹⁾	Measure continuity at back of speedometer. See appropriate article; For Trooper DOHC models, see: WIRING DIAGRAMS - DOHC , For Trooper SOHC models, see: WIRING DIAGRAMS - SOHC

⁽²⁾	Turn speedometer cable to cycle reed switch on and off.

VEHICLE SPEED SENSOR VOLTAGE ⁽¹⁾

Application

⁽²⁾ Volts

All Models

Less than 10

⁽¹⁾	Measure voltage at back of speedometer. See appropriate article; For Trooper DOHC models, see: WIRING DIAGRAMS - DOHC , For Trooper SOHC models, see: WIRING DIAGRAMS - SOHC

⁽²⁾	With ignition on, turn speedometer cable to cycle reed switch on and off.