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. For sensors not listed in this article, see appropriate SELF-DIAGNOSTICS article.

NOTE: Unless stated otherwise in test procedure, perform all voltage tests using a Digital Volt-Ohmmeter (DVOM) with a minimum 10-megohm input impedance. For connector terminal identification, see TERMINAL IDENTIFICATION in SELF-DIAGNOSTICS - INTRODUCTION article.

ENGINE COOLANT TEMPERATURE (ECT) SENSOR RESISTANCE ⁽¹⁾

Application & Temperature °F (°C)

Ohms

Diamante, Eclipse Turbo & 2.4L, Mirage & Montero Sport

32 (0)

5100-6500

68 (20)

2100-2700

104 (40)

900-1300

176 (80)

260-360

Eclipse 2.0L Non-Turbo

77 (25)

9000-11,000

212 (100)

600-800

Galant

68 (20)

2100-2700

176 (80)

260-360

Montero & 3000GT

32 (0)

5800

68 (20)

2400

104 (40)

1100

176 (80)

300

⁽¹⁾	Check resistance across ECT sensor terminals.

FUEL TANK DIFFERENTIAL PRESSURE SENSOR OUTPUT VOLTAGE

Application

Volts

Diamante

⁽¹⁾ 2.0-3.0

Eclipse 2.0L Turbo & 2.4L, Galant, & Montero Sport

⁽²⁾ 2.0-3.0

⁽¹⁾	Measured between fuel tank differential pressure sensor terminals No. 1 and 2.

⁽²⁾	Measured between fuel tank differential pressure sensor terminals No. 2 and 3.

INTAKE AIR TEMPERATURE (IAT) SENSOR RESISTANCE

Application & Temperature °F (°C)

Ohms

Diamante, & Eclipse Turbo & 2.4L, Mirage & Montero Sport ⁽¹⁾

32 (0)

5300-6700

68 (20)

2300-3000

104 (40)

1000-1500

176 (80)

300-420

Eclipse 2.0L Non-Turbo ⁽²⁾

77 (25)

9000-11,000

212 (100)

600-800

Galant & Mirage 1.8L ⁽¹⁾

68 (20)

2300-3000

176 (80)

300-420

Mirage 1.5L ⁽²⁾

68 (20)

2300-3000

176 (80)

300-420

Montero & 3000GT ⁽¹⁾

32 (0)

6000

68 (20)

2700

176 (80)

400

⁽¹⁾	IAT sensor is incorporated in airflow sensor assembly. Check resistance between IAT sensor terminals No. 5 and 6. See Fig 1 -Fig 4 .

⁽²⁾	Check resistance across IAT sensor terminals No. 1 and 2. See Fig 1 -Fig 4

Fig 1: Identifying IAT Sensor Terminals (Eclipse 2.0L Non-Turbo)

Courtesy of MITSUBISHI MOTOR SALES OF AMERICA.

Fig 2: Identifying IAT Sensor Terminals (Mirage 1.5L)

Courtesy of MITSUBISHI MOTOR SALES OF AMERICA.

Fig 3: Identifying IAT Sensor Terminals (Mirage 1.8L & Montero Sport 2.4L)

Courtesy of MITSUBISHI MOTOR SALES OF AMERICA.

Fig 4: Identifying IAT Sensor Terminals (All Other Models)

Courtesy of MITSUBISHI MOTOR SALES OF AMERICA.

NOTE: On Diamante equipped with Traction Control (TCL) an accelerator pedal position sensor is used in place of a throttle position sensor.

NOTE: Measure throttle position sensor total and variable resistance between specified TP sensor terminals. See Fig 5 and Fig 6 . See TP SENSOR TEST TERMINAL IDENTIFICATION table. Total resistance should be 3500-6500 ohms. Variable resistance should change smoothly between 3500 and 6500 ohms as throttle valve is moved from closed to wide open throttle.

TP SENSOR TEST TERMINAL IDENTIFICATION

Application			Terminals No.
Total Resistance
Eclipse 2.0L Non-Turbo			1 & 3
Diamante With TCL & Without TCL			1 & 4
All Other Models			1 & 4
Variable Resistance
Diamante
With TCL			1 & 2
Without TCL			3 & 4
Eclipse 2.0L Non-Turbo			2 & 3
Galant, Montero & Montero Sport 3.0L			1 & 3
All Other Models			2 & 4

Fig 5: Identifying TP Sensor Terminals (Eclipse 2.0L Non-Turbo)

Courtesy of MITSUBISHI MOTOR SALES OF AMERICA.

Fig 6: Identifying TP Sensor Terminals (All Other Models)

Courtesy of MITSUBISHI MOTOR SALES OF AMERICA.

VOLUME AIRFLOW (VAF) HERTZ TEST ⁽¹⁾

Application

Hz @ 700 RPM

Hz @ 2500 RPM

Eclipse 2.0L Non-Turbo & Mirage 1.5L ⁽²⁾

Montero

25-51

80-120

3000GT

DOHC

Non-Turbo

24-50

71-111

Turbo

26-52

93-133

SOHC

21-47

57-97

All Other Models ⁽³⁾

⁽¹⁾	Measure Hertz frequency using a scan tool.

⁽²⁾	Vehicle is not equipped with VAF sensor.

⁽³⁾	See appropriate SELF-DIAGNOSTICS article.