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Emission Control Systems > < Circuit Operation|Page 3549
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Voltage Signal: Description and Operation

PURPOSE

 

Supplies Powertrain Control Module (PCM), with current charging system voltage.

 
OPERATION

 

If the PCM senses low battery voltage:

 

-

PCM increases injector pulse width to compensate for low voltage.

 

-

PCM increases generator field voltage. 

 

If the PCM senses high battery voltage:

 

-

PCM decreases injector pulse width to compensate for high voltage.

 

-

PCM decreases generator field voltage. 

Emission Control Systems > < Circuit Operation|Page 3549