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 MTR TERM RESISTANCE

Terminals ⁽¹⁾

Fully Closed Ohms

Fully Open Ohms

E2 & Vs

⁽²⁾ 200-600

20-1000

E2 & Vc

200-400

E2 & THA ⁽³⁾

-4°F (-20°C)

13,600-18,400

68°F (20°C)

2210-2690

2100-2690

140°F (60°C)

493-667

E1 & Fc

Infinite

⁽¹⁾	See appropriate I - SYS/COMP TESTS article in the ENGINE PERFORMANCE section for terminal identification.

⁽²⁾	20-600 ohms on 323 and Protege.

⁽³⁾	Intake air thermosensor.

OXYGEN SENSOR

Operating Condition	Voltage
Rapidly Accelerating	0.5-1.0
Deceleration	0.0-0.4

TP SENSOR CONTINUITY

Test Condition ⁽¹⁾

⁽²⁾ Continuity

.004" (.10 mm)

Yes

.024" (.60 mm)

⁽¹⁾	Insert feeler gauge of specified thickness between throttle lever and throttle stop screw.

⁽²⁾	Check continuity with ohmmeter connected between TP sensor terminals "E" and IDL.

TP SENSOR CONTINUITY

Test Condition

Continuity Between IDL & TL/E

Continuity Between POW & TL/E

.016" (.41 mm) ⁽¹⁾

Yes

.027" (.7 mm) ⁽¹⁾

WOT

Yes

⁽¹⁾	Insert feeler gauge of specified thickness between throttle lever and throttle stop screw.

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 Operating Range Charts: Introduction

Use the Manual With the Right Hardware

When to See a Mechanic