Sensor Operating Range Charts

ENGINE COOLANT TEMPERATURE (ECT) SENSOR RESISTANCE

Temp. °F (°C)	Ohms
32 (0)	5880
68 (20)	2210-2690
104 (40)	1140
140 (60)	580
176 (80)	290-350

INTAKE AIR TEMPERATURE (IAT) SENSOR RESISTANCE

Temp. °F (°C)	Ohms
32 (0)	5880
68 (20)	2210-2690
104 (40)	1140
140 (60)	580
176 (80)	290-350

CAUTION: Damage to MAP sensor will occur if connections are made incorrectly.

MANIFOLD ABSOLUTE PRESSURE (MAP) SENSOR OUTPUT VOLTAGE (OFF-VEHICLE)

Altitude (Feet)

Vacuum (In. Hg)

⁽¹⁾⁽²⁾ Output Voltage

0-2000

28-30

2.9-4.2

2001-5000

25-28

2.7-4.0

5001-8000

22-25

2.5-3.8

8001-10,000

20-22

2.0-3.3

⁽¹⁾	MAP sensor output voltage is tested with three 1.5-volt batteries connected in series (output 4.5-5.0 volts). Positive lead of batteries is connected to VIN terminal. Negative lead of batteries is connected to ground terminal. Check output voltage between VOUT terminal and ground.

⁽²⁾	Voltage should reduce when up to 15 in. Hg of vacuum is applied to MAP sensor.

CAUTION: Damage to MAP sensor will occur if connections are made incorrectly.

MANIFOLD ABSOLUTE PRESSURE (MAP) SENSOR OUTPUT VOLTAGE (ON-VEHICLE)

Altitude (Feet)

Vacuum (In. Hg)

⁽¹⁾⁽²⁾ Output Voltage

3.5-4.1

1000

3.4-4.0

2000

3.2-3.8

3000

3.1-3.7

4000

3.0-3.6

5000

2.9-3.5

6000

2.8-3.3

7000

2.7-3.2

8000

2.6-3.1

9000

2.5-3.0

10,000

2.4-2.9

⁽¹⁾	MAP sensor output voltage is tested with coupler connected to ECM. ECM is located at upper left corner of instrument panel. Before testing MAP sensor output voltage, ensure ECM supply voltage is 4.75-5.25 volts at connector terminal B1 (Light Green wire) and terminal A25 (Light Green/Blue wire).

⁽²⁾	Output voltage is checked at ECM connector terminal B2 (Light Green/Red wire) and terminal A25 (Light Green/ Blue wire). Start engine, if possible, and see if output voltage varies.

CAUTION: Blowing compressed air through mass airflow sensor will damage it.

POWER STEERING PRESSURE SIGNAL VSV (IF EQUIPPED)

Application

Ohms

All Models

⁽¹⁾ .33-.39

⁽¹⁾	Measure between power steering VSV terminals.

THROTTLE POSITION (TP) SENSOR RESISTANCE

Application		Ohms
Between Terminals "A" & "B"
With .012" (.30 mm) Clearance At Stop Screw		Less Than 5000
With .035" (.89 mm) Clearance At Stop Screw		Infinity
Between Terminals "A" & "D"		4370-8130
Between Terminals "A" & "C"
At Idle		240-1140
At Wide Open Throttle		3170-6600

VEHICLE SPEED SENSOR (VSS) RESISTANCE

Application

Ohms

All Models

⁽¹⁾ *

⁽¹⁾	With ohmmeter connected to vehicle speed sensor terminals, ohmmeter should alternate between zero and infinity 4 times per sensor shaft revolution.