O.k.,The PCM B fuse energizes the EDU relay and when this relay is energized it powers the ECMRPV and EDU fuses.So these fuses will not have power until the PCM B fuse fault is corrected.
For some odd reason the diagram is trying to tell me the PCM B fuse powers the fuel pump relay for a diesel engine and your model shouldnt use this relay.Double check in your under hood fuse panel to see if this relay is installed and if it is remove it and see if the fuse still shorts out and let me know.
The PCM B feeds the ECM (engine control module) as well here.If the engine control module has an internal electrical short in it this will occur and the ecm would need replaced.If there is a short in the wiring leading from the PCM B fuse to the engine control module this will occur as well and the wiring would need traced and inspected and repaired.If there is a short in the wiring leading from the PCM B fuse to the EDU relay this will also occur and the wiring would need repaired.
With this fuse being blown this will cause all of the issues you see here.You will need to locate the short by removing the edu relay to see if the relay is the cause needing replaced,removing the fuel pump relay (if equipped) to see if this relay is the cause needing replaced,or checking the wiring inside the fuse box running from the pcm b fuse to the edu and fuel pump relay for any shorts needing repaired,check the wiring from the pcm b fuse to the ecm to see if any wiring is at fault needing repaired.If all of these are o.k.and the short still continues then the ecm needs replaced.
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