Hi All Ok heres my story... I was driving to warick for the nissan nationals. Everything was all sweet until i lost all electrics!!! i pulled over and saw the EFI loom wires melted and destroyed. I beleive a wire was shorting on the car body. Well i just replaced the EFI loom today. Gees its not a easy job! Ive made sure everything is connected correctly but it still doesnt work. Im guessing maybe either the ECU or PTU could have been fried due to this. yes? could there be anything else causing it not to work? i dont have any computer programs to check for faults. Could anyone with expertise come over and have a look and make any suggestions. I live in Alexandra Hills. I dont have any spare ECU or PTUs so i cant swap them around. Any ideas anyone? Thanks John
try your local auto elec. Even if its just a quote/check up to see whats up. Then you can organise getting it fixed, if not, just get them to fix.
Firstly check all your fuses John. Then if still no go, try checking your ECU for error codes using the paperclip method if you don't have Datascan. The main reason for this is moreso to see if the ECU is actually working at all rather than actually testing for errors. If it shows code 55, or any error code for that matter, then it shows the ECU is at least functioning so some degree. Maybe it'll show an error code for the PTU (21 off memory) in that case look there. If still no luck, then yes get someone around to have a look and swap stuff around to narrow the problem down.
Where abouts did the loom break? There are a number of fusible links and one main circuit breaker that should have stopped that happening. If it broke down underneath the battery compartment, then there's a very real possibility you burnt out your ECU. Also check the fusible link between the brake booster and the fender on the drivers side. Won't start without this one. Don't want to be the bearer of bad vibes, but there's been some dodgy bridging going on of fusible links or the circuit breaker for the loom to melt. As soon as it shorted it should have blown any of those consumable points, not the loom. Sorry.
I stopped on the way to Warwick when I saw these guys pulled over. They had the loom stripped down at this time. 1/2 the wires in the loom were melted back to bare wires in the section around the battery and on the passenger side of the plenum. I wasn't able to hang around to see if the wiring was damaged any further back toward the firewall.
Sounds to me like somebody replaced the Green Fusible Link with a straight wire. That will fry your ECU and roast the Wiring Harness fast. In the smaller Fuse Box up by the battery (well not too sure with the AUS spec) there should be a green Fusible Link check it. It should have fried before the Wiring Harness for sure.
Hey all how do you check the bigger fuses to see if they have blown? like the small ones you can see if the wire has a break. the cubed like ones you cant. can you?
Ok i checked the fuse box close to the brake booster. the Far left i think it says blue batt has been hard wired. should it? if not which i guess what type of fuse should it have? I'll check the other fuses passenger side tomorrow. thanks guys
Hi All ok heres where im at. ive checked all the fuses. all good. i bought a 2nd wiring harness. over time i have to replace some connectors as some are broken. the ecu works. im 99.9% sure the wiring is pluged correctly as i swapped one plug one at a time with the new one. (maybe would be good if someone could come around to double check if its correct) i've replaced the battery as it wasnt charging to 100%, replaced all spark plugs, old ecu replaced with the one with the harness i got, fuel pump works as i hear it start up when key is turned, fuses are all fine. im guessing maybe the ptu is dead or maybe the CAS is the culprit. what do you guys think and what else is there i should check? im stuck. Please help Thanks John
so in a ball, its turning over, but not firing, so this is where id start. take out no. 1 spark plug(simply because its the easiest to get to) after turning it over a bit. now what does the plug tell you, is thier a fuel smell?if so, connect the spark plug into the coil and earth the plug against the plenum and have some one turn the car over, or turn it over and see if you can see a spark. now thiers most likely one of those not working.
Ptu is very likely after a harness meltdown. The PTU is very susceptible to voltage spikes or poor harness earths. Did you find what caused the meltdown at Warwick?
