Engine Controls - Sensor Operating Range Charts: Introduction

NOTE: This article is only to be used for Laser and Talon models. When testing sensors on other models, see appropriate G - TESTS W/ CODES article.

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: Unless stated otherwise in test procedure, perform all voltage tests using a Digital Volt-Ohmmeter (DVOM) with a minimum 10-megohm input impedance.

AIRFLOW SENSOR RESISTANCE ⁽¹⁾

Application

Terminals No.

Ohms

1.8L & 2.0L Non-Turbo

4 & 6

⁽²⁾ *

2.0L Turbo

6 & 8

⁽²⁾ *

⁽¹⁾	For testing procedure, see appropriate I - SYS/COMP TESTS article.

⁽²⁾	Resistance should be approximately 6000 ohms at 32°F (0°C), 2700 ohms at 68°F (20°C) and 400 ohms at 176°F (80°C).

COOLANT TEMPERATURE SENSOR RESISTANCE ⁽¹⁾

Temperature °F (°C)

Ohms

32 (0)

6000

68 (20)

2700

104 (40)

2500

176 (80)

400

⁽¹⁾	For testing procedure, see appropriate I - SYS/COMP TESTS article.

EGR TEMPERATURE SENSOR RESISTANCE ⁽¹⁾

Temperature °F (°C)

Ohms

122 (50)

6000-8300

212 (100)

1100-1400

⁽¹⁾	For testing procedure, see appropriate I - SYS/COMP TESTS article.

IDLE SPEED MOTOR POSITION SENSOR RESISTANCE (1.8L) ⁽¹⁾

Terminals No.

Ohms

2 & 3

4000-6000

3 & 5

⁽²⁾ 4000-6000

⁽¹⁾	For testing procedure, see appropriate I - SYS/COMP TESTS article.

⁽²⁾	With idle speed control plunger activated.

OXYGEN SENSOR VOLTAGE ⁽¹⁾

Application

Volts

1.8L

⁽²⁾ .6-1.0

⁽¹⁾	For testing procedure, see appropriate I - SYS/COMP TESTS article.

⁽²⁾	Warm engine until coolant temperature reaches 185-205°F (85-96°C). Measure voltage with engine running at more than 1300 RPM.

OXYGEN SENSOR RESISTANCE (2.0L & 2.0L TURBO) ⁽¹⁾

Terminals No.

Ohms

3 & 4

⁽²⁾ 12

3 & 4

⁽³⁾ 30 or More

⁽¹⁾	Oxygen sensor can also be tested by measuring oxygen sensor output voltage. For testing procedure, see appropriate I - SYS/COMP TESTS article.

⁽²⁾	With an oxygen sensor temperature of 68°F (20°C).

⁽³⁾	With an oxygen sensor temperature of 752°F (400°C).

THROTTLE POSITION SENSOR RESISTANCE ⁽¹⁾

Terminals No.

Ohms

1 & 4

3500-6500

2 & 4

3500-6500

⁽¹⁾	Operate throttle valve slowly from idle position to full open position. Check if resistance changes smoothly in proportion to throttle valve opening angle.

VEHICLE SPEED SENSOR RESISTANCE ⁽¹⁾

Application

Ohms

All Models

⁽²⁾ *

⁽¹⁾	For testing procedure, see appropriate I - SYS/COMP TESTS article.

⁽²⁾	Connect ohmmeter across reed switch terminals and rotate speedometer cable. Ohmmeter reading should fluctuate between continuity and no continuity.