Pontiac Workshop Service and Repair Manuals

Manifold Pressure/Vacuum Sensor: Electrical Specifications

COOLANT TEMPERATURE SENSOR (CTS)

100°C (212°F) ........................................................................................................................................................................................................ 177 Ohms
90°C (194°F) .......................................................................................................................................................................................................... 241 Ohms
80°C (176°F) .......................................................................................................................................................................................................... 332 Ohms
70°C (158°F) .......................................................................................................................................................................................................... 467 Ohms
60°C (140°F) .......................................................................................................................................................................................................... 667 Ohms
50°C (122°F) .......................................................................................................................................................................................................... 973 Ohms
40°C (104°F) ........................................................................................................................................................................................................ 1459 Ohms
30°C (86°F) .......................................................................................................................................................................................................... 2238 Ohms
20°C (68°F) .......................................................................................................................................................................................................... 3520 Ohms
10°C (50°F) .......................................................................................................................................................................................................... 5670 Ohms
0°C (32°F) ............................................................................................................................................................................................................ 9420 Ohms
-10°C (14°F) ....................................................................................................................................................................................................... 16180 Ohms
-20°C (-4°F) ........................................................................................................................................................................................................ 28680 Ohms
-30°C (-22°F) ...................................................................................................................................................................................................... 52700 Ohms
-40°C (-40°F) .................................................................................................................................................................................................... 100700 Ohms

MANIFOLD ABSOLUTE PRESSURE SENSOR (MAP)

KEY ON ENGINE OFF

1,000 to 2,000 Feet ......................................................................................................................................................................................... 3.6 to 5.2 Volts

2,000 to 3,000 Feet ......................................................................................................................................................................................... 3.5 to 5.1 Volts

3,000 to 4,000 Feet ......................................................................................................................................................................................... 3.3 to 5.0 Volts

4,000 to 5,000 Feet ......................................................................................................................................................................................... 3.2 to 4.8 Volts

5,000 to 6,000 Feet ......................................................................................................................................................................................... 3.0 to 4.6 Volts

6,000 to 7,000 Feet ......................................................................................................................................................................................... 2.9 to 4.5 Volts

7,000 to 8,000 Feet ......................................................................................................................................................................................... 2.8 to 4.3 Volts

8,000 to 9,000 Feet ......................................................................................................................................................................................... 2.6 to 4.2 Volts

9,000 to 10,000 Feet ....................................................................................................................................................................................... 2.5 to 4.0 Volts

NOTE:

Idle (Closed Throttle) ....................................................................................................................................................................................... 1.0 - 2.0 Volts
Wide Open Throttle (WOT) ............................................................................................................................................................................. 4.0 - 4.8 Volts

INTAKE AIR OR MANIFOLD AIR TEMPERATURE SENSOR

210°F (100°C) ........................................................................................................................................................................................................ 185 Ohms
160°F (70°C) .......................................................................................................................................................................................................... 450 Ohms
100°F (38°C) ........................................................................................................................................................................................................ 1800 Ohms
70°F (20°C) .......................................................................................................................................................................................................... 3400 Ohms
40°F (4°C) ............................................................................................................................................................................................................ 7500 Ohms
20°F (-7°C) ........................................................................................................................................................................................................ 13,500 Ohms
0°F (-18°C) ........................................................................................................................................................................................................ 25,000 Ohms
-40°F (-40°C) ................................................................................................................................................................................................... 100,700 Ohms

THROTTLE POSITION SENSOR

Voltage.................................................................................................................................................................................................  0.95 max volts @ idle

The Throttle position Sensor is not adjustable on this engine but should read between 0.36 to 0.95 volts at closed throttle, and about 4.8 volts at wide
open throttle.