Anatmoly Posted April 14, 2022 Report Share Posted April 14, 2022 Installing a new G4X in S13 with a SR20DET swap car was running with a stock ECU Replaced it with a G4X, I’m trying to connect to my laptop. I’ve downloaded and installed PC link. PC link fails to connect, when I turn the key on the fuel pump comes on and continues to run, I get 2 fast flashing blue lights on the ecu, but PC link fails to connect. I have tried the auto settings, I’ve tried manually setting the comm port still nothing Any thoughts? The car came to me as a drift car and has been cut up and modified including the harness, but was a good running car Quote Link to comment Share on other sites More sharing options...
Adamw Posted April 14, 2022 Report Share Posted April 14, 2022 At least one of the blue LED's should be on solid with ign on. If it is flashing it suggests it is powering up and down. Is it the 76pin S13 ecu or 64pin S15 ecu? Quote Link to comment Share on other sites More sharing options...
Anatmoly Posted April 14, 2022 Author Report Share Posted April 14, 2022 76 pin 7 minutes ago, Adamw said: At least one of the blue LED's should be on solid with ign on. If it is flashing it suggests it is powering up and down. Is it the 76pin S13 ecu or 64pin S15 ecu? 76 pin My confidence in the existing wiring harness is low So I may have a power issue Quote Link to comment Share on other sites More sharing options...
Adamw Posted April 14, 2022 Report Share Posted April 14, 2022 I will explain how the main power circuit works so you can check some of it out: +12V "ignition on" signal comes into pin 45 when the ign switch is on. Check you have 12V here. The ECU then grounds pin 16 - this is the trigger to the main eccs relay (chassis wiring). Check this pin is at ground when ign is on. When the ECCS relay turns on this supplies the main +12V to pin 49 & 59. Check you have 12V here. Quote Link to comment Share on other sites More sharing options...
Anatmoly Posted April 14, 2022 Author Report Share Posted April 14, 2022 4 minutes ago, Adamw said: I will explain how the main power circuit works so you can check some of it out: +12V "ignition on" signal comes into pin 45 when the ign switch is on. Check you have 12V here. The ECU then grounds pin 16 - this is the trigger to the main eccs relay (chassis wiring). Check this pin is at ground when ign is on. When the ECCS relay turns on this supplies the main +12V to pin 49 & 59. Check you have 12V here. Ok, is there a pin out of the connector so I can find correct pins? Quote Link to comment Share on other sites More sharing options...
Adamw Posted April 14, 2022 Report Share Posted April 14, 2022 Yep, its in the help file and there should be a printed manual with the ecu as well. Click on pic below should give you a clearer version Quote Link to comment Share on other sites More sharing options...
Anatmoly Posted April 15, 2022 Author Report Share Posted April 15, 2022 36 minutes ago, Adamw said: Yep, its in the help file and there should be a printed manual with the ecu as well. Click on pic below should give you a clearer version Excellent thank you Quote Link to comment Share on other sites More sharing options...
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