Swift Posted June 1, 2023 Report Share Posted June 1, 2023 Hi. I have a link extreme in a little race car. I have an innovate lc2 lambda sensor. When I switch on the ignition it does not run because it is on a GP output aux 8 (low side so I guess that means it’s earthing the relay) with a condition of 500 rpm before it runs. This is what the tuner set. My issue is when I turn the ignition off the lambda controller runs until the battery switch is turned off. It’s like the ECU is keeping the earth to the relay even though the ecu is offline (on my laptop it goes off line as soon as I turn the ignition off. Are there any ideas what might be happening? Cheers. Glenn Quote Link to comment Share on other sites More sharing options...
Adamw Posted June 1, 2023 Report Share Posted June 1, 2023 The 12V supply to the relay coil must be from an ignition switched source, yours must be live all the time if the relay is staying engaged after ign is off. Quote Link to comment Share on other sites More sharing options...
Swift Posted June 1, 2023 Author Report Share Posted June 1, 2023 Thank you Adam. I’ll trace the wires and check it out. I can understand how the ecu grounds the relay to switch on the controller but I cannot understand how it holds the earth and keeps the innovate relay engaged after the ECU is switched off.? Quote Link to comment Share on other sites More sharing options...
Swift Posted June 1, 2023 Author Report Share Posted June 1, 2023 Ok I found out this. The circuit is keeping the positive bus (ignition switched circuit live) I have the aux 8 on the low side running through a fuse to the 85 terminal Adam. The number 30 is off a live circuit. The number 87 terminal goes to the innovate device. The 86 is from an ignition switched positive bus. Once I removed the fuse from the aux to terminal 85 that ignition bus is de powered. If I put the fuse back in and switch on the ignition and then turn it off again power remains on the ignition bus. I’m lost. Quote Link to comment Share on other sites More sharing options...
Swift Posted June 1, 2023 Author Report Share Posted June 1, 2023 I see the number 8 Aux shows 10.3 volts when the ECU is on. Is this correct ? When I switch off the ignition the aux8 volts reduces to zero slowly. But the ignition bus stays powered. It’s like the ECU is powering the ignition circuit. Any help from anyone greatly appreciated Quote Link to comment Share on other sites More sharing options...
Adamw Posted June 1, 2023 Report Share Posted June 1, 2023 40 minutes ago, Swift said: I see the number 8 Aux shows 10.3 volts when the ECU is on. Is this correct ? Yes. Can you draw a schematic of how the Innovate relay is connected to the ecu and the ignition circuit. You have a back feed, the only place a backfeed can come from is an aux device that remains live after the ignition switch is off. So it is either your innovate relay pin 86 that is still has 12V after the ignition switch is off or something else that you have connected to one of the other aux outputs. What else is connected to ecu aux outputs? Quote Link to comment Share on other sites More sharing options...
Swift Posted June 1, 2023 Author Report Share Posted June 1, 2023 I’ll try draw something up. But the aux 8 is to 85. Ignition to 86. Live feed from 12 v supply to 30. Innovate to 87. Here is a pic of all the aux channels Quote Link to comment Share on other sites More sharing options...
Swift Posted June 1, 2023 Author Report Share Posted June 1, 2023 And Adam I’d very much like to run the car Saturday. It’s no different to the way it ran before and if I run it will any voltage on the aux channels be an issue if everything runs ok? It’s only when I turn off the ignition I have the issue. If I turn off the battery switch straight away all power is cut and the ignition turns off. Cheers Glenn Quote Link to comment Share on other sites More sharing options...
Adamw Posted June 1, 2023 Report Share Posted June 1, 2023 59 minutes ago, Swift said: But the aux 8 is to 85. Ignition to 86. Live feed from 12 v supply to 30. Innovate to 87. Yes, I understand this much. What Im getting at is if the relay is staying energised, then it must still have current flowing through its coil after the ignition switch is off. For that to happen it means pin 86 must still have a path back to the battery somehow when the switch is off. 24 minutes ago, Swift said: It’s only when I turn off the ignition I have the issue. If I turn off the battery switch straight away all power is cut and the ignition turns off. There is no problem to the ecu or other electronics running it like this, it will just flatten the battery if the master is not shut off. But be aware since this relay is not switching off with the ignition switch it may mean there is a possibility that the engine wont switch off with the ignition switch when you want it to either - potentially a safety issue. Quote Link to comment Share on other sites More sharing options...
Swift Posted June 1, 2023 Author Report Share Posted June 1, 2023 Thank you Adam. I’ll use the battery switch to turn off power after turning the ignition switch off. This kills all power and will shut the motor off. This will be an interim measure and I’ll try to find the issue. I have peak and hold injectors and as per instructions the injectors are hot wired from the battery switch and the ecu switches them. Now I read this could be an issue? I also have two normal bulbs running through aux channels. Ce light and shift light. Any issues there? Cheers Quote Link to comment Share on other sites More sharing options...
Adamw Posted June 1, 2023 Report Share Posted June 1, 2023 21 minutes ago, Swift said: I have peak and hold injectors and as per instructions the injectors are hot wired from the battery switch and the ecu switches them. If its a red G4 this is fine, if its the earlier silver one with P&H drivers then they can backfeed just like an aux. 22 minutes ago, Swift said: I also have two normal bulbs running through aux channels. Ce light and shift light. Any issues there? Cheers Provided they only have 12V when the ignition switch is on they are fine. Quote Link to comment Share on other sites More sharing options...
Swift Posted June 1, 2023 Author Report Share Posted June 1, 2023 It’s a link g4+ extreme. I have to run peak and hold due the low resistance injectors. Cheers for all the answers. Hopefully I can figure it out. I’ll remove things off the aux channels one by one to see what might be back feeding. Quote Link to comment Share on other sites More sharing options...
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