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

CRANKSHAFT POSITION (CKP) SENSOR RESISTANCE

Terminals No.	Ohms
1 & 2	1000
1 & 3	0
2 & 3	0

ENGINE COOLANT TEMPERATURE (ECT) SENSOR RESISTANCE

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

HEATED OXYGEN SENSOR (HO2S) VOLTAGE

Condition

⁽¹⁾ Volts

Lean

About 0.2

Rich

About 0.7

⁽¹⁾	Measured between connector terminal and ground.

INTAKE MANIFOLD CHANGE-OVER (IMCO) VALVE SW RESISTANCE

Terminals No.	Ohms
1 & 2	25-35

MASS AIRFLOW (MAF) SENSOR TEST

Condition

⁽¹⁾ Volts

Key On Engine Off

About 0.3-1.1

Engine Running ⁽²⁾

About 1.5-3.4

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

⁽²⁾	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	3600