While I was getting fuel, the engine shut down and computer show ABS light (truck), i cranked and engine turn but ECM is not getting power. In diagnostic show SAE J1939 Data Link, i checked all fuses, but Fuse # 79, 80 & 81 ( ECM) aren't receiving power, look like a broke wire, any idea which wire can be? If I jump the fuse #81, the truck start and run normal.
Volvo 2004, volvo engine 465, 10 speed.
Thans, Walter
Truck shut down at fuel pump
Discussion in 'Volvo Forum' started by waltherz, Apr 27, 2018.
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did you see if the fuse on top of the batteries is good, also see if you can swap relay 04 with some thing else.
Last edited: Apr 27, 2018
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Yes, I checked fuse on batteries and replaced the relay.
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Their is an ecm fuse on top of the battery boxes if I am not mistaken on a single red wire. Check to make sure that wire has good connection.
HopeOverMope Thanks this. -
If you knew the “pin-out” of the ECM, you could splice into the harness of the ECM. The wire that sends 12v power to the ECM. Cut about 6-12 inches down, add new wire straight to battery with a in-line fuse and maybe a switch.
Could also be, maybe it’s not getting the signal from the key switch ignition. A way to test this, is to unplug the starter relay on the outsides firewall and test for 12v power while cranking. That should be able to cancel out the ignition signal if testing good.
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problem is not ecm but vehicle ecu just back feed it for now you have a wire broken from batteries to the bulkhead connector i think it should be wire number 78 or 79 one of those that powers vehicle ecu try to read out the codes and see which one it will say operation failed on you should be able to read engine ecu and everything else but will not be able to read codes on vehicle ecu, try to back feed power for now to get moving from the maxi fuse for trailer abs should be only one there, it will get you home or around until you can make further diagnostics.
QUALITYTRUCK Thanks this. -
Thanks
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Thanks Narisha and HopeOverMope, today I have time to check and reeplace the wire come from battery and see what happen.
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