Sutkale Posted July 5, 2012 Report Share Posted July 5, 2012 Okay. Among the other Vipec related issues, there is a weird voltage issue going on. After a while the power has been switched on, the ECU starts to see 0 voltage or 24,5 voltage jumping around. I have measured with a multimeter from the +14 input wire and it sees a constant 12,5 voltage as it should be. What the heck could this be... :shock: ? The system cannot generate such a voltage in anyway and in reality there is 12,5 voltage in +14 voltage wire. EDIT: A backfeed issue maybe... :roll: Quote Link to comment Share on other sites More sharing options...
lekonna Posted July 5, 2012 Report Share Posted July 5, 2012 groundings ok ? Quote Link to comment Share on other sites More sharing options...
Sutkale Posted July 5, 2012 Author Report Share Posted July 5, 2012 groundings ok ? Should be, as I take the ground from power grounds and multimeter shows readings as they should be. Quote Link to comment Share on other sites More sharing options...
JCE Posted July 5, 2012 Report Share Posted July 5, 2012 I assume this happens when power is on and engine not running (since voltage is 12,5)? I suggest you double and triple check your wiring, turn off all analog/digital inputs and auxoutputs. If u have relays connected to auxoutput remove those. ' Because if u have a relay connected to auxoutput and straight to battery + you will have a backfeed problem. Atleast when turning the power off @ the +14 terminal. Might not solve your problem, but worth a try. Good luck Quote Link to comment Share on other sites More sharing options...
Sutkale Posted July 6, 2012 Author Report Share Posted July 6, 2012 I assume this happens when power is on and engine not running (since voltage is 12,5)? I suggest you double and triple check your wiring, turn off all analog/digital inputs and auxoutputs. If u have relays connected to auxoutput remove those. ' Because if u have a relay connected to auxoutput and straight to battery + you will have a backfeed problem. Atleast when turning the power off @ the +14 terminal. Might not solve your problem, but worth a try. Good luck Will do! Here's a link to a screenshot from the statistics, maybe the high voltage has been a reason for such a strange numbers.. :? http://i87.photobucket.com/albums/k133/ ... enshot.jpg Quote Link to comment Share on other sites More sharing options...
JCE Posted July 6, 2012 Report Share Posted July 6, 2012 Yes, that looks like some MAJOR interference or some input is connected/setup wrong. I had same kind of issues when i had my trigger problems and got loads of errors and basicly everything was Fu**ed up- Its something simple, you just need to find it. How is ur Sensor grounds connected etc? trigger grounds? Quote Link to comment Share on other sites More sharing options...
Sutkale Posted July 6, 2012 Author Report Share Posted July 6, 2012 Yes, that looks like some MAJOR interference or some input is connected/setup wrong. I had same kind of issues when i had my trigger problems and got loads of errors and basicly everything was Fu**ed up- Its something simple, you just need to find it. How is ur Sensor grounds connected etc? trigger grounds? Sensor grounds are for sure connected to ECU's sensor grounds. Funny thing is that this popped up even though the car has been nearly untouched...and had no electrical issues before that. What kinda trigger problems you had? What did you do to fix the problem? Quote Link to comment Share on other sites More sharing options...
JCE Posted July 6, 2012 Report Share Posted July 6, 2012 My trigger problems werent electrical, my trigger wheel was bad/wrong type and gave occasionally faulty signal etc...and the problems occured only when engine was running/starting, power on everything was fine. So your problem must be electrical. Can you upload your map so we can have a look at it ? Quote Link to comment Share on other sites More sharing options...
Jason Posted July 6, 2012 Report Share Posted July 6, 2012 what happens when you disconnect the alternator charge lead and run the engine off just the battery or an external power source? Still get the high readings? have you installed non-resistor type spark plugs? Quote Link to comment Share on other sites More sharing options...
Sutkale Posted July 8, 2012 Author Report Share Posted July 8, 2012 Disconnect the ECU and connected the ECU directly with auxillary wires to the battery and ECU showed normal voltages. Also harness shows normal voltage from supply wire and ground wires are connected as they should be and showing 0,01 resistance. Connected the ECU back to the harness and the problem came back. I also disconnected different sensors but no influence. Basically the problems begins after a while (app. 5-10 minutes) when the power is connected to the ECU. First 24,5volts and then to 0 volts. Great.. :evil: ECU as powerwise has been working normally for as long as it has been installed but the problems came after a while I swapped to another engine. Whit this new engine the ECU did not have this kind of symptoms for a couple of weeks. Quote Link to comment Share on other sites More sharing options...
JCE Posted July 8, 2012 Report Share Posted July 8, 2012 Have you measured the supply voltage when the problem appears? That seems like a power supply issue, something wrong with the cars electric system, fuse, relay or ignition switch. When there is a bad cnnection somewhere, it starts to heat up and voltage drops.... Quote Link to comment Share on other sites More sharing options...
Sutkale Posted July 8, 2012 Author Report Share Posted July 8, 2012 Have you measured the supply voltage when the problem appears? That seems like a power supply issue, something wrong with the cars electric system, fuse, relay or ignition switch. When there is a bad cnnection somewhere, it starts to heat up and voltage drops.... Supply voltage is 12v constantly when the problem appears. This is checked from the supply wire. That makes this so weird as ECU sees different voltage than there is in reality. This makes me think this is ECU based problem. Quote Link to comment Share on other sites More sharing options...
JCE Posted July 8, 2012 Report Share Posted July 8, 2012 But if the ECU works if u have it powered from an other powersource, the problem must be in the cars wiring/powersupply :roll: Quote Link to comment Share on other sites More sharing options...
Sutkale Posted July 9, 2012 Author Report Share Posted July 9, 2012 But if the ECU works if u have it powered from an other powersource, the problem must be in the cars wiring/powersupply :roll: Did another test with an external power source (ECU disarmed from the wire harness) and the problem was there after a couple of minutes powering the ECU. Voltage oskillating between 24,5 - 6 - 0 volts. In my opinion this is ECU based problem.. Quote Link to comment Share on other sites More sharing options...
JCE Posted July 9, 2012 Report Share Posted July 9, 2012 Do a firmware upgrade and run the map again. Might be a bug in the software.....if it doesnt work, its hardware related and non fixable Quote Link to comment Share on other sites More sharing options...
Sutkale Posted July 9, 2012 Author Report Share Posted July 9, 2012 Do a firmware upgrade and run the map again. Might be a bug in the software.....if it doesnt work, its hardware related and non fixable I've got the latest firmware installed already. :? Vipec is supposedly made by humans, so it must be fixable. I've heard Vipec's customer service and guarantee is on high level and this will be fixed.. Quote Link to comment Share on other sites More sharing options...
JCE Posted July 9, 2012 Report Share Posted July 9, 2012 Yes, that is also the reason i chose vipec, great features and good support. Quote Link to comment Share on other sites More sharing options...
Scott Posted July 11, 2012 Report Share Posted July 11, 2012 Hi, It sounds like you have carried out the correct testing. Either return your ECU to your dealer for them to organise testing/repair, or email us on [email protected] to organise the testing/repair directly with us. Kind regards, Scott Quote Link to comment Share on other sites More sharing options...
Sutkale Posted July 11, 2012 Author Report Share Posted July 11, 2012 Hi, It sounds like you have carried out the correct testing. Either return your ECU to your dealer for them to organise testing/repair, or email us on [email protected] to organise the testing/repair directly with us. Kind regards, Scott Will do. My dealer will run this on test bench. Did another test yesterday with an external powersource but this time the voltage remained as it should be. Let's see what the test bench says. BTW, on what level the +5v outvolt source should be? My ECU shows 5.05 volts (at runtime values) and puts out a errror code "5v supply error". Thanks! Quote Link to comment Share on other sites More sharing options...
Scott Posted July 12, 2012 Report Share Posted July 12, 2012 Hi again, Is it this fault code you are getting? 74: Analog 5V Supply Error According to VTS Help > VX ECU Tuning Functions > ECU Fault codes It should read between about 4.9 and 5.1 volts. So 5.05 volts should not be a problem. On the ECU I have connected for testing at the moment the voltage is 4.98v. Scott Quote Link to comment Share on other sites More sharing options...
Sutkale Posted July 13, 2012 Author Report Share Posted July 13, 2012 Hi again, Is it this fault code you are getting? 74: Analog 5V Supply Error According to VTS Help > VX ECU Tuning Functions > ECU Fault codes It should read between about 4.9 and 5.1 volts. So 5.05 volts should not be a problem. On the ECU I have connected for testing at the moment the voltage is 4.98v. Scott Yes! This fault code exists while runtime values shows 5.05 volts. I am gonna get a report today from my dealer how the ECU is doing in his test bench. Quote Link to comment Share on other sites More sharing options...
Sutkale Posted August 1, 2012 Author Report Share Posted August 1, 2012 This turned out to be a hardware issue after all. Thanks for Vi-Pec / Link staff for replacing the ECU! 8-) Quote Link to comment Share on other sites More sharing options...
JCE Posted August 2, 2012 Report Share Posted August 2, 2012 Good you got it sorted out Quote Link to comment Share on other sites More sharing options...
Simon Posted August 2, 2012 Report Share Posted August 2, 2012 It took a bit of finding. It must be cold enough here that the board tested fine on the bench. It started failing when we warmed it up with a heat gun! Quote Link to comment Share on other sites More sharing options...
Sutkale Posted July 26, 2013 Author Report Share Posted July 26, 2013 Okay, ECU is not broken this time.. , but it is getting getting some voltage spikes. I suppose this is due to generator. When the engine is cold, the generator voltage level jumps (that what ECU sees) between 13.92 and 14.02 volts rapidly. After a some time and things gets hotter the voltage gets steady, setting to 13.60 v level. While the voltages jumps around, ECU sees very short bursts of 24.5 v and internal baro begins to alter as well causing some occasional lean conditions while driving. Once the engine reaches its normal operating temperature, generator output voltage gets steady and ECU calms down and everything works normally. Has anyone experienced anything like this? Should I pay attention to generator or to be more concerned from the ECU? EDIT: The described phenomen is more common if the car is not driven for a while. Quote Link to comment Share on other sites More sharing options...
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