Pcm asd fuse keeps blowing. When the ASD fuse blows despite unplugging the fuel pump, inspect the ignition coils and wiring harness for shorts or damage. When the key is turned off, as a safety feature. If the fuse doesn't blow with these unplugged, reconnect them one at a time to see which one is blowing the fuse. Jan 31, 2026 · PCM fuse blown? Learn what it powers, symptoms, why it keeps blowing, and how to replace it safely without damaging your PCM. Try pulling the ASD relay to see if the fuse still blows. Summary: ASD fuse blows under hard acceleration and high RPM's. ASD1 is blowing when the engine is asked for full poweer, typically when shifting. So anything between Fuse 9, to the ASD relay and on the other side of the relay can cause that fuse to blow. If it does, good chance it is the PCM. Any help would be greatly appreciated. Get expert diagnostic methods to pinpoint the electrical short circuit protecting your vehicle’s computer. Fuse #24 - PCM - Keeps Blowing 1 reading Jump to Latest 6. Tonight I disovered that the PCM / ASD relay fuse was intermitant (just barely blown). Aug 30, 2010 · Tech at the dealer diagnosed a blown ASD #1/#3 Fuse (M19) and claims to have found a short in that circuit, which he fixed. 4L keeps blowing the PCM/ASD 20AMP fuse the moment power is applied. The most likely cause, as found by the original poster, is a valve cover bolt pushing into the harness and shorting the M19 hot wire. We have a 1998 Dodge Stratus and the PCM/ASD fuse keeps blowing every time the car is turned on. Charles Wilkerson you could be right, there could be other things wrong that contributed to the trans ASD fuse blowing. Control of the ASD relay (ASD relay clicking issue) is on a different circuit with different fuse. However the O2 sensors also have their own fuse and relay but they aren't blowing. The function of the automatic shutdown (ASD) relay, is to shut off power to major systems. It was running fine until one day it just died and this started. Most of the posts i have read on the ASD fuse problem where caused from Intakes rubbing against the wires or the SRT was totally modified. Ok, so I've read almost every single PCM fuse issue thread out there but no one ever really said how they fixed it or what the problem ended up being. But be aware that the Fuse also powers the PCM, coil and injectors OBD-II connector and surge solenoid, so a short in any to those wiring harnesses could cause the fuse to blow. The fuse is located in teh PDC. I listened for the fuel pump priming, nothing. Thanks in advance. The car was running and I tore it down to replace a blown head gasket. My jeep keeps lowing the ASD fuse I checked the relay and it was good' I changed the spark plugs, cam and crankshaft sensors, i keep getting code p1389, I have gone trught 5 fuses so far trying to figure it out I even tried a new pcm and its still keeps doing it I can start it and it runs for. The ASD relay is controlled by a ground connection provided by the computer, which sends the ASD relay that ground connection when the computer is happy with all of the sensor inputs. Repeated ASD relay fuse blowing usually indicates a short in the ignition or fuel injection circuits controlled by the PCM. I bought a new Duralast battery today to take the old cracked and possibly sulphated battery out of the equation. In a 2006, +12VDC from fuse 9 powers the PCM, but it also goes through the energized ASD relay to the coil packs and all fuel injectors. How Does an ASD Relay Work? The ignition switch activates ASD relays. I replaced the fuse and tried to start the car and blew the replacement fuse. Someone said need to trace the wires back, but don't have a wiring diagram. If your Jeep JK is blowing the M19 fuse (ASD circuit) and won't start, especially after running for a short period, suspect a short to ground in the wiring harness. What does the ASD system do? I heard there is a relay, where is it and what does it do? Is ASD part of the rev limiter? My 2005 4. Jan 18, 2024 · Very often a blown ASD/FP fuse is caused by a worn pump thats pulling too many amps. Seems like any blown fuse that keeps blowing (assuming no major electrical modifications to the circuit) is due to a short. So before you tell me to searchI already have! The normal **** happened when the PCM fuse blows -- the car was running, but it sputtered to 2. **UPDATE** Ok1st off my car is stock except for the stage 1 PCM. Discovered the Auto Shut Down fuse blown. 0L often faces ASD relay fuse blowouts and PCM circuit shorts causing electrical failures. EVERY TIME! This started happening on Thursday of last week. SOURCE: 98 grand cherokee asd relay blowing fuse The fuse it doing it's job, you have a short ( Wire that is connected to a ground, that draws too much power ) If you have an electrical schematic ( Repair manual ) find out which wires are connected to that fuse and check them for any chaffing, cuts, unnesassary twists, or corrosion. If the fuse blows right away, the issue lies within the ignition circuit, and the ignition switch needs to be replaced. 6K views 6 replies 2 participants last post by niebs Nov 23, 2014 on my way home from work a 20A fuse in my power distribution box, the fuse has to do with power going to the pcm, thats all i know, blew. HELP! ASD fuse keeps blowing> yes i've searched the forum. I didn't want to do anything with the Customer: 1998 Dodge Stratus 2. Drove it around town and to work, and this evening it died again. 2K views 3 replies 2 participants last post by RT Aug 5, 2017 1998 Grand Cherokee 4. When you turn off the engine, the PCM or ignition switch sends a signal to the ASD relay, which de-energizes the coil and opens the circuit by connecting this terminal. Tech replaced PCM as problem. Still have the same problem. That the ASD relay's fuse is blowing makes me think something is wrong with the ASD relay itself. Luckily I had spares with me so I replaced it. Sep 20, 2021 · One user found that a Synergy air compressor bracket with sharp edges had cut through the loom and wires in the main harness, causing intermittent shorts and ultimately blowing the ASD fuse. Enjoy the videos and music you love, upload original content, and share it all with friends, family, and the world on YouTube. My ASD problems started about What engine? Fuse 9 is the main power that runs through the ASD relay (not the power that energizes it). The fuse also protects the power circuit for the fuel pump relay and pump. 91 Dakota-keeps blowing ASD fuse-help auto shutdown fuse low idle stall surging Jump to Latest 8. Then again on Friday, while merging with traffic (i. When you turn the key to the “on” position, 12 volts are applied to the coil, creating a magnetic field. The PCM controls the relay by switching the ground path for the solenoid side of the relay on and off. The perfect solution instead is to install a new fuse, then use the test bulb in place of the relay. Phil Like Sort by The other day I went to start my 98 ZJ and it ran for 2 seconds and died like it was out of fuel. Here's how to troubleshoot: * **ASD Relay and PCM:** The fuse in question often powers the PCM and ASD relay. I do not know what this is called, but it too was clicking continuously. Unplug the PCM and ASD, and see if the fuse still blows if the fuse still blows then the problem is most likely a short in the wiring. During a spirited drive, at the top of 2nd gear, the fuse blew. I am far from an expert and I don't have access to service manual that outlines how to properly test this van and a wiring diagram. To keep things simple I decided to ask this question in a separate thread. Does anyone have any ideas why the fuse might be blowing? Does this fuse run anything else besides the PCM and ASD relay? It keeps blowing the fuse ASD1. The ignition switch does not even have to be on. As many of the engine management systems are wired together, if any of the circuits that the ASD relay provides power for go out as a result of a bad ASD relay, then it may affect other circuits, one of them being the starting circuit. Understand the common causes of a failing PCM fuse. So then I treed to turn the car on and on cranking power. Any info would be appreciated. 9K views 18 replies 5 participants last post by kainers Jan 3, 2006 K 1999 - 2016 Super Duty - PCM Relay fuse keeps blowing - Does anyone know what causes the PCM relay fuse to keep blowing out. so i stole one from the fuse box in the jeep and put it in, instantly when i put it in, it blew, i went through 3 fuses trying to make it work. That would interupt the PCM causing the P0340 and P1391 and also would cause the ASD fuse to blow since the O2 sensors are powered off of the ASD relay. Roy The ASD relay turns on again during engine rotation, (cranking or running), and it is not practical to crank the engine for very long. Our automatic shutdown (ASD) Circuit took a major plunge on us and it completely left the jeep Immobile! IF we were camping or somewhere remote, this would h If a fuse is constantly blowing after cleaning ECU connections on a 99 TJ, it likely indicates a short circuit. I have a pcm asd fuse keeps on blowing so I unplug the coil pack and then I trued the key see what would happen the fuse did not blow. I recently replaced the PCM, fuel pump, and CPS, because of a stalling issue (the PCM was the actual problem). go to bottom go to top The ASD relay power circuit contains a 20 amp fuse between the buss bar in the PDC and teh relay. Okay, the fuse controls the ASD relay and the PCM. the fuse But since this fuse wasn't popping immediately after you swapped in the new PCM, means that this is a new development and not likely to be the cause of your not starting issue. Engine does not crank Another symptom of bad ASD relay is an engine that will not crank at all. 0 cut off. I would disconnect the ASD relay and see if the fuse still fails. You can conduct a test by inserting a functional fuse and removing the ASD relay. Also, consider that a faulty PCM could contribute to the issue. Check the ASD relay and PCM connectors for corrosion or loose pins. e The ASD relay is controlled by the PCM in the same way as the fuel pump relay. Have changed out the fuel pump and still does it. All seems normal on this 00 F650 except that it keeps blowing. PCM keeps blowing fuse HELP Jump to Latest 8. The relay coils are grounded for 2-3 seconds at ignition on, or when the engine is cranking or running. Blows time it makes contact in the fuse box. 0L: ASD Relay Fuse Keeps Blowing Grand Cherokee 4. Yes fuse D is the one that fails, I unplugged the ASD relay and the light stayed on, put it back in and unplugged the fuel pump relay and the light dimmed along with the ASD relay clicking constantly along with the picture attached that is on the other side of the engine bay. awwc, doj18, ibsd, ns4d, vxftv, 5luzl, bug58a, uzjr, 34kri, pt9xdl,