Dan A Posted September 30, 2011 Report Share Posted September 30, 2011 The only thing else I can do is give you this: Diagnostic trouble code (DTC) ECM-91A7 is stored if the engine control module (ECM) registers an internal or external fault. Substitute value -the accelerator pedal (AP) is ignored when braking -the cruise control cannot be activated -the engine speed (RPM) is limited using fuel shut off. The maximum permitted engine speed depends on the accelerator pedal (AP) position -throttle unit in mechanical limp home mode, the throttle disc in fixed position (only 5 cylinder engines with DENSO electronics). Possible source -something is blocking the throttle position sensor (an oil film, dust etc.) -poorly charged battery or corroded in the connecting cables -the power supply to the throttle unit -old software in the throttle unit -defective throttle unit. Fault symptom -the accelerator pedal (AP) is ignored when braking -the cruise control cannot be activated -uneven idle -jerks during engine braking -very poor throttle response (only 5 cylinder engines with DENSO electronics) -maximum speed approximately 50 km/h (only 5 cylinder engines with DENSO electronics) -the ETS warning lamp lights (C70 and S/V70 -2000 only). Checking the electronic throttle module (ETM) and software Check battery and charging system. This diagnostic trouble code (DTC) may be stored before the battery voltage becomes too low. Check the electronic throttle module (ETM) connector. Check for contact resistance and oxidation. Thoroughly check the throttle for dirt and sticking. Check that no objects are blocking the throttle. Check for dirt and sticking visually by pressing the throttle disc to change the angle. Hint: Small objects can cause the throttle disc to jam momentarily, this can cause the diagnostic trouble code (DTC). Read off the software number in the electronic throttle module (ETM) by clicking the VCT2000 symbol. Always check that the software number corresponds to the latest VOLVO software. See the service information for information about the latest software. Hint: The diagnostic trouble code (DTC) may be the result of a faulty electronic throttle module (ETM). If the diagnostic trouble code (DTC) persists, despite the above checks and remedies, try a new electronic throttle module (ETM). Caution! A new electronic throttle module (ETM) is delivered without software. For the electronic throttle module (ETM) to function after replacement, it must be programmed. P1053 Check that the connector terminals for the electronic throttle module are OK. Check that there is voltage to the throttle unit from the system relay. With ignition on there should be a cheeping noise from the throttle unit for a moment, when it receives voltage. Check that the battery voltage is normal. Check that the charging status of the battery is OK. Symptom check In certain cases to determine if the fault is permanent or intermittent the engine must be started and stopped up to three times (to force the fault to occur). Cancel when the symptoms appear in the car but keep the engine running. Hint: Check for symptoms between each start of the engine. See the fault code information. The symptom “accelerator pedal (AP) is ignored when braking†can be used as a check. In the event of faults, it is not possible to increase the engine speed (RPM) at the same time as the brake pedal is depressed. Note! The supply voltage to the electronic throttle module must be interrupted to empty the memory between each start. Hint: Interrupt the supply voltage to the electronic throttle module by removing the affected fuse. Do not forget to insert the fuse before the next engine start. See the fuses In the integrated relay / fusebox in the engine compartment. Read off diagnostic trouble codes (DTCs) with the engine running.Diagnostic trouble code (DTC) ECM-91F0 is stored in the engine control module (ECM) if the electronic throttle module registers an internal fault. Substitute value -the accelerator pedal (AP) is ignored when braking -the cruise control cannot be activated. Possible source -the power supply to the throttle unit -something is blocking the throttle position sensor (an oil film, dust etc.) -poorly charged battery or corroded in the connecting cables -defective throttle unit. Fault symptom -the accelerator pedal (AP) is ignored when braking -the cruise control cannot be activated -the ETS warning lamp lights (C70 and S/V70 –2000 only). Link to comment Share on other sites More sharing options...
Oredigger Posted September 30, 2011 Author Report Share Posted September 30, 2011 hmmm, thanks for that. I am sure I will read it over many times. The car is going into the mechanic on Monday. I have until then to fix the problem myself, which probably wont happen. I spoke with the mechanic on the phone, and he thinks it may be a software issue, which I think is a good idea, so he is going to see if he can update the software of the ETM. I am not sure how that works, but it may be worth a shot. I doubt its a dirty/clogged ETM just because its new, and the fault is very electronic in nature, very much like a switch being thrown. It is either on or off, no in-between. I could be wrong though, it might be some sludge that needs to warm up before it allows the throttle to move. It seems very unlikely since the ETM is brand new. But I did notice, when I was installing this ETM, the throttle plate seemed to be harder to move than previous ETMs. I probably should have oiled it or something. Dam nit. I dont want to have to take it back off, I am so tired of getting in there... Especially if turns out not to be dirty. Link to comment Share on other sites More sharing options...
Dan A Posted October 1, 2011 Report Share Posted October 1, 2011 It isn't software. Xemodex pre loads it with the latest. I'd honestly just replace the cable and if it doesn't fix hit Xemodex up for a third replacement. It's under warranty so I wouldn't try doing anythingto it if it's the culprit and sure wouldnt replace it with an oem from Volvo. Maybe your mechanic willdeal with xemodex if it needs to be rma'd. Link to comment Share on other sites More sharing options...
Oredigger Posted October 5, 2011 Author Report Share Posted October 5, 2011 Well, took it into the mechanic and he said it was a software issue. I have also had a software issue with my front drivers seat, so perhaps my car did not have the latest software. In any case, he installed a new Volvo unit and downloaded the correct software for it, and it all works great. (so far) I am returning the Xemodex unit to them, they have agreed to give me a refund. I cant help but think this whole problem could have been avoided if they were still just rebuilding ETMs instead of trying to match software. I would so love to have my original ETM back, with the Xemodex DAS in it. Instead I am stuck with the dumbarse variable resistance potentiometers. Not that it matters though, in my poking around the car during this entire process, I saw lots of potential pitfalls in the future, I'll be surprised if the car makes it another 130k the point where this volvo ETM will likely fail again. And if it does, I'll be happy to bring it back to said mechanic and give him another $800 to install another volvo unit. $800/130k miles is not bad. I mean, I was all pissed at Volvo for designing a contacting ETM, but that was just the engineer in me wanting everything the be designed in the best possible way. My brake booster has also begun to fail recently, but I gave no thought to just buying another volvo brake booster. I did not think to find some permanent solution to the brake booster problem. I am not sure why I thought the ETM should be any different. So what if we have to spend $2k every 100k miles on various parts, that seems pretty normal. I guess I could see if I was paying the dealer to do it. They wanted 1400. That may be reaching the limit of what you should pay every 100k. But I found this mechanic, and when he quoted me $800 for the Volvo ETM install, he was my new best friend. I will be going to him for anything and everything from now on, I am sick and tired and trying to figure this stuff out myself, I have too much on my plate as it is. I also dont have the 7k/year VIDA membership (or whatever it is), which pretty much makes it impossible to do any DIY repairs. Link to comment Share on other sites More sharing options...
Dan A Posted October 5, 2011 Report Share Posted October 5, 2011 If it was software why didn't he just reload the software? Why the new hardware? Anyway glad it is resolved. Hope this one lasts 130k. Some don't. Link to comment Share on other sites More sharing options...
Oredigger Posted October 5, 2011 Author Report Share Posted October 5, 2011 As I understand it, once an ETM has software on it, you can no longer make any changes to it. Its like a CD-R, not a CD-RW. Link to comment Share on other sites More sharing options...
mkc70 Posted October 6, 2011 Report Share Posted October 6, 2011 Glad to hear your car is running properly. Lol, it took them 3 on my vehicle to finally work properly. Code for my brake pedal position sensor was related to the xemodex etm. Link to comment Share on other sites More sharing options...
Oredigger Posted October 6, 2011 Author Report Share Posted October 6, 2011 hmmm, well why didn't they send me three? I would have taken a third. Maybe. Was yours an 01? Link to comment Share on other sites More sharing options...
Dan A Posted October 6, 2011 Report Share Posted October 6, 2011 As I understand it, once an ETM has software on it, you can no longer make any changes to it. Its like a CD-R, not a CD-RW. You can flash an ETM. Link to comment Share on other sites More sharing options...
Oredigger Posted October 7, 2011 Author Report Share Posted October 7, 2011 hmm, well. I guess he did not feel that would work. He may have just changed it to get rid of a part he was unfamiliar with, but se la ve, my car is working and I am done with it. The fact that the volvo ETM works with no issues demonstrates that the Xemodex ETM was flawed. Whether it was the software or the hardware, the fact is, it did not work. Link to comment Share on other sites More sharing options...
mkc70 Posted October 8, 2011 Report Share Posted October 8, 2011 hmmm, well why didn't they send me three? I would have taken a third. Maybe. Was yours an 01? From what I've read Volvo owners seem stop at 2 etms and switch to the oem Volvo one on the 3rd attempt with success. Did you request a 3rd unit? Ultimately they have more success than failure, just chalk it up to bad luck. Them offering a refund is an easy way to get rid of you and a problem. BTW: Good luck with the refund. Link to comment Share on other sites More sharing options...
Oredigger Posted October 10, 2011 Author Report Share Posted October 10, 2011 yup, if I dont get the refund, I will be ranting and raving quite a bit. Its supposed to come when they receive the returned ETM, which should be soon. I did not ask for a third ETM. I was going through a troubleshooting checklist with them, everything on the checklist pointed to a needing a new ETM, but they were beginging to be evasive. They wanted me to replace other things (like battery cables and relays). I dont have the time nor the pocketbook to replace every little thing peice of electrics on the car that might lead to ETM fault codes. And now that I have the Volvo unit and it is working great, I can see that further time and expense verifying the second flawed Xemodex unit would have been a wild goose chase. I guess what I was saying, was if they had outright offered to send another unit, I would have taken it. But they wanted me to put a lot of money and effort in verifying the ETM was the problem, which I was not willing to do. You know, every mechanic I spoke with thought the idea that you can buy an ETM with preloaded software was a joke. This, again, seems to be the problem. Why is it that Xemodex thinks they can preload software? If they would just rebuild original customer ETMs, it would seem like a lot of hassle could be avoided. Link to comment Share on other sites More sharing options...
mkc70 Posted October 10, 2011 Report Share Posted October 10, 2011 yup, if I dont get the refund, I will be ranting and raving quite a bit. Its supposed to come when they receive the returned ETM, which should be soon. I did not ask for a third ETM. I was going through a troubleshooting checklist with them, everything on the checklist pointed to a needing a new ETM, but they were beginging to be evasive. They wanted me to replace other things (like battery cables and relays). I dont have the time nor the pocketbook to replace every little thing peice of electrics on the car that might lead to ETM fault codes. And now that I have the Volvo unit and it is working great, I can see that further time and expense verifying the second flawed Xemodex unit would have been a wild goose chase. I guess what I was saying, was if they had outright offered to send another unit, I would have taken it. But they wanted me to put a lot of money and effort in verifying the ETM was the problem, which I was not willing to do. You know, every mechanic I spoke with thought the idea that you can buy an ETM with preloaded software was a joke. This, again, seems to be the problem. Why is it that Xemodex thinks they can preload software? If they would just rebuild original customer ETMs, it would seem like a lot of hassle could be avoided. I know what you went through and it can be frustrating, but understand ordering an ETM with preloaded software is convenient, provided it is correct for the vehicle. The mechanic can reassemble the vehicle immediately and only need to work on it one time. I was also offered a refund after the second unit did not work, but told Chris that was not an option. In a heated discussion he said he would send 50 if need be, I told him to keep them coming till one finally worked. Luckily the 3rd one worked. However I have yet to receive a refund that was promised plus my core charge. This occurred last summer, highly doubtful, lol. So now I have 2 virtually new ETM's that are chilling in my garage. Just get the refund and move on, your car is running well now. Link to comment Share on other sites More sharing options...
Oredigger Posted October 11, 2011 Author Report Share Posted October 11, 2011 Ah, you are a better negotiator than I am. If I were more familiar with how the software worked on this car, I might have been more confident in my "software problem" theory, and pushed harder for another unit. But yes, like you said, I am done with it (for now). I may try again at 230k when this yellow label Volvo unit fails on me. I suppose that will depend on how the transmission is holding up. Link to comment Share on other sites More sharing options...
Oredigger Posted October 14, 2011 Author Report Share Posted October 14, 2011 Update: the Xemodex refund posted to my account this morning. They are a company that keeps their word. :tup: Link to comment Share on other sites More sharing options...
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