NOTE: For sensor operating range charts on Passport, refer to Rodeo in Isuzu SENSOR OPERATING RANGE CHARTS article.

Sensor operating range information can help determine if a sensor is out of calibration. Although an out-of-calibration sensor may not set a trouble code, it may cause driveability problems.

NOTE: Unless stated otherwise in testing procedures, preform all voltage tests using a Digital Volt-Ohmmeter (DVOM) with a minimum 10-megohm input impedance. Carefully backprobe PCM harness connector using Backprobe Set (07SAZ-001000A) to avoid connector damage. Voltage readings may vary slightly due to battery condition or charging rate.

ENGINE COOLANT TEMPERATURE (ECT) SENSOR TEST

Temperature - °F (°C)

⁽¹⁾Volts

Accord, Odyssey & S2000

-4 (-20)

5.0

176-200 (80-93)

0.4-0.7

302 (150)

0.0

⁽²⁾Ohms

Civic, CR-V & Prelude

32 (0)

5,000

104 (40)

1,000

140 (60)

500

⁽¹⁾	Measure voltage at appropriate PCM terminals. See WIRING DIAGRAMS article.

⁽²⁾	Measure resistance across sensor terminals.

EXHAUST GAS RECIRCULATION (EGR) VALVE LIFT SENSOR VOLTAGE TEST

Position

⁽¹⁾Volts (Approximate)

All Models

Idle

1.2

8 In.Hg (27 kPa)

4.3

⁽¹⁾	Measure voltage at appropriate PCM terminals. See WIRING DIAGRAMS article. Voltage should increase smoothly as vacuum is applied.

FUEL TANK PRESSURE SENSOR

Vacuum Applied - In. Hg		Volts
All Models
-2		.5
0		2.5
2		4.5

INTAKE AIR TEMPERATURE (IAT) SENSOR TEST

Temperature - °F (°C)

⁽¹⁾Volts

Accord, Odyssey & S2000

-4 (-20)

5.0

302 (150)

0.0

⁽²⁾Ohms

Civic, CR-V & Prelude

32 (0)

5,000

104 (40)

1,000

176 (80)

500

⁽¹⁾	Measure voltage at appropriate PCM terminals. See WIRING DIAGRAMS article.

⁽²⁾	Measure resistance across sensor terminals.

MAP SENSOR VOLTAGE TEST

Vacuum Applied - In. Hg

Volts

Accord, Odyssey & S2000 ⁽¹⁾

0.5

2.9

4.5

Civic, CR-V & Prelude ⁽²⁾

2.5

2.0

1.5

1.0

0.5

⁽¹⁾	Check throttle position using scan tool.

⁽²⁾	Measure voltage at appropriate PCM terminals. See WIRING DIAGRAMS article.

OXYGEN SENSOR VOLTAGE TEST⁽¹⁾

Condition

Volts

Lean

Primary

Less Than 0.5

Secondary

Less Than 0.3

Rich

Primary

Greater Than 1.5

Secondary

Greater Than 0.6

⁽¹⁾	Measure voltage between ground and appropriate oxygen sensor terminal using a high-impedance DVOM. See WIRING DIAGRAMS article.

THROTTLE POSITION (TP) SENSOR

Condition

Volts/Value

Throttle Valve

Except S2000

Fully Closed

⁽¹⁾0.5/⁽²⁾10%

Wide Open

⁽¹⁾4.5/⁽²⁾90%

S2000

Fully Closed

⁽¹⁾0.3/⁽²⁾6%

Wide Open

⁽¹⁾4.5/⁽²⁾90%

⁽¹⁾	Backprobe terminals at PCM.

⁽²⁾	Check throttle position using scan tool.

VEHICLE SPEED SENSOR (VSS) TEST

Application

⁽¹⁾Volts

All Models

⁽²⁾

⁽¹⁾	Backprobe terminals at PCM.

⁽²⁾	Voltage will fluctuate between zero and 5 volts while rotating drive wheel.

When to See a Mechanic

Stop DIY work and contact a certified mechanic immediately if any of the following apply:

• You smell fuel, burning insulation, or see smoke.

• Brakes feel soft, pull hard to one side, or make grinding noises.

• The engine overheats, stalls repeatedly, or misfires under load.

• You are missing required tools, torque specs, or safe lifting equipment.

• You are not confident in the next step or safety outcome.

Safety Warning

Engine Controls - Sensor Range Charts: Introduction

Use the Manual With the Right Hardware

When to See a Mechanic

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