ASD fuse is called an AUTOMATIC SHUT DOWN FUSE.
The ASD sense circuit informs the PCM when the ASD relay energizes. A 12 volt signal at this input indicated to the PCM that the ASD has been activated. This input is used only to sense that the ASD relay is energized.
When energized, the ASD relay supplies battery voltage to the fuel injectors, ignition coils, and the heating element in each oxygen sensor. If the PCM does not receive 12 volts from this input after grounding the ASD reley, it sets a Diagnostic Trouble Code (DTC).
Thats an Automatic Shutdown fuse The ASD relay supplies power to the fuel injectors, ignition coil and oxygen sensor. It gets energized with a ground input on terminal 85 from the PCM. If the relay is defective the truck won''''t get fuel to the injectors nor will the other parts receive voltage and the truck won''''t start. You should also get a check engine code from the PCM when and if the relay is bad. It might have code P1388 or P1389 for ASD problem.
4,037 views
Usually answered in minutes!
×