dodge Workshop Repair Guides

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General Operation|Page 1923 > < Diagram Information and Instructions|Page 1920
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Powertrain Control Module: Description and Operation
General Operation

 
INPUT OPERATION

 

The PCM determines current engine operating conditions by interpreting inputs from various sensors and switches. 

 

Sensor Inputs                               

 

-

Engine Coolant Temperature (ECT) Sensor

-

Manifold Absolute Pressure (MAP) Sensor   

-

Throttle Position Sensor (TPS)                

-

Heated Oxygen Sensor (O2S)               

-

Vehicle Speed Sensor (VSS)                

-

Distributor (Hall Effect) Pick-up 

-

Throttle Body Temperature Sensor

 

Other Inputs                               

 

-

A/C Request                            

-

Brake Switch                              

-

Park/Neutral Switch                     

-

Speed Control System Controls             

-

Self Test Input (STI)     

-

Battery Voltage (B+)                 

 
OUTPUT OPERATION

 

The PCM then actuates various output devices to achieve the best compromise between power, fuel consumption, and emissions. 

 

Outputs

 

-

Air Conditioning Clutch (ACC) Relay

General Operation|Page 1923 > < Diagram Information and Instructions|Page 1920