Control module power supply
 
  
 
 
  
   
    
     |  | Control module power supply | 
   
  
  
   
   
    
     Battery voltage (+30 circuit)
    
   
   
    The transmission control module is continuously supplied with battery voltage (+30 circuit) on pin 18. The control module uses this voltage as a back-up for the memory. Current consumption on back-up is less than 1 mA.
    
    
    
      
    
    
   
   
  
   Battery voltage (+15 circuit)
  
  
   When the ignition switch is in the Drive position, the transmission control module is supplied with current (+15 circuit) on pin 17. This current is necessary in order to activate the control module.
   
   
   
     
   
   
   
    