Chevrolet Workshop Service and Repair Manuals

Idle Speed Control Motor: Specifications

ENGINE COOLANT TEMPERATURE (ECT) SENSOR

212°F or (100°C)   .................................................................................................................................................................................................  177 Ohms

158°F or (70°C)   ...................................................................................................................................................................................................  467 Ohms

100°F or (38°C)   .................................................................................................................................................................................................  1800 Ohms

68°F or  (20°C)   ..................................................................................................................................................................................................  3520 Ohms

40°F or (4°C)   .....................................................................................................................................................................................................  7500 Ohms

20°F or (-7°C)   .................................................................................................................................................................................................  13,500 Ohms

0°F or (-18°C)   .................................................................................................................................................................................................  25,000 Ohms

-40°F or (-40°C)   ............................................................................................................................................................................................  100,700 Ohms

IDLE AIR CONTROL (IAC) VALVE

Terminals "A" to "B"   ....................................................................................................................................................................................  40 to 80 Ohms

Terminals "C" to "D"   ....................................................................................................................................................................................  40 to 80 Ohms

Terminals "B" to "C"   .....................................................................................................................................................................................  Infinite Ohms

Terminals "A" to "D"   .....................................................................................................................................................................................  Infinite Ohms

MANIFOLD ABSOLUTE PRESSURE (MAP) SENSOR 

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

OXYGEN (O2S) SENSOR

Closed Loop  .............................................................................................................................................................  100 mV (.1 volt) to .999 mV (1.0 volt)

THROTTLE POSITION SENSOR

Idle (normal) .................................................................................................................................................................................................   .45 to .95 volts.

(maximum)  ...................................................................................................................................................................................................  1.25 volts.

Wide Open Throttle  ......................................................................................................................................................................................  4.0 to 4.5 volts.

The Throttle position Sensor is not adjustable on this engine but should read below 1.25 volts at closed throttle and about 4.5 volts at wide open
throttle.