dodge Workshop Repair Guides

Dodge Workshop Service and Repair Manuals

Automatic Shut Down (ASD) Relay <--> [Main Relay (Computer/Fuel System)]|Testing and Inspection > < Diagram Information and Instructions|Page 246
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Automatic Shut Down (ASD) Relay: Description and Operation

Relay Locations

 
PURPOSE

 

Relay supplies battery voltage to the ignition coil and fuel injector(s).

 
OPERATION

 

Ignition switch in the START or RUN position, and PCM is receiving reference signals from the distributor pick-up.

 

The Powertrain Control Module (PCM) activates the relay (by supplying a ground). 

 

If the PCM does not receive a signal from the distributor pick-up, (engine not running), the PCM interrupts the relay ground and no voltage is
supplied to the ignition coil, or fuel injector(s).

 
NOTE:  The PCM controls the Auto Shutdown (ASD) and fuel pump relays simultaneously, through the same ground circuit. 

Automatic Shut Down (ASD) Relay <--> [Main Relay (Computer/Fuel System)]|Testing and Inspection > < Diagram Information and Instructions|Page 246