Sensor Range Charts

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

CLOSED THROTTLE POSITION (CTP) SWITCH RESISTANCE

Terminals	Ohms @ Closed Throttle	Ohms @ Slightly Open Throttle
4 & 6	0	Infinite (Open)

CRANKSHAFT POSITION (CKP) SENSOR RESISTANCE

Terminals No.	Ohms
1 & 2	Approx. 1000
1 & 3	Infinite (Open)
2 & 3	Infinite (Open)

ENGINE COOLANT TEMPERATURE (ECT) SENSOR RESISTANCE

Temperature	Ohms
68°F (20°C)	Approx. 2500
176°F (80°C)	Approx. 330

ENGINE SPEED (RPM) SENSOR RESISTANCE

Terminals No.	Ohms
1 & 2	Approx. 1
1 & 3	Infinite (Open)
2 & 3	Infinite (Open)

HEATED OXYGEN SENSOR (HO2S) VOLTAGE

Condition

⁽¹⁾ Volts

Lean

Approx. 0.2

Rich

Approx. 0.7

⁽¹⁾	Measured between connector terminal and ground.

MASS AIRFLOW (MAF) SENSOR TEST

Condition

⁽¹⁾ Volts

Key On Engine Off

About 0.3-1.1

Engine Running

⁽²⁾ 1.5 Minimum-3.4 Maximum

⁽¹⁾	Backprobe connector terminals No. 1 and 2.

⁽²⁾	Continuously vary engine speed between idle and 4000 RPM.

THROTTLE POSITION (TP) SENSOR RESISTANCE

Terminals

Ohms @ Idle

Ohms @ Wide Open Throttle

1 & 2

1500-2600

N/A

2 & 3

750-1300

⁽¹⁾ 3600 Maximum

⁽¹⁾	Resistance should gradually increase as throttle is opened.