RightsBlue Posted May 13, 2021 Report Share Posted May 13, 2021 hey guys, I English is a weak, we hit a sentence using the google translation. I want to run a Honda "Today" car on the LINK atom G4 +. I'm making a harness for that, but it doesn't work until the engine starts. This is the state of the harness currently created. ・ ECU can be started without any problem ・ ECU power supply is 12V or more ・ Intake temperature and throttle can be recognized. ・ No voltage comes to crank, cam, water temperature, O2 ・ Throttle is input incorrectly to the intake pressure ・There is no problem with the ignition coil and injector. Images such as the current harness and trigger waveforms are attached. Anyone can help me. Thank you. The Japanese language is translated below. 吸気温度 = intake air temp 水温 = water temp 吸気圧力 = intake pressure , MAP センサ = sensor JA4 wiring.webp harness.xlsx Quote Link to comment Share on other sites More sharing options...
Adamw Posted May 13, 2021 Report Share Posted May 13, 2021 Im not sure how much help I can offer since it is a japan only vehicle we have no info here or wiring diagrams etc. I assume all factory data will be japanese only which may not be very useful to me. If you have a link to a factory wiring diagram please share it and I will take a look to see if I can help. Your attachement "JA4 wiring" isnt available. I will also ask user @Mach if he can maybe offer any help, I know he has a E07Z engine with a Link ECU so maybe he has some advice or knowledge. RightsBlue 1 Quote Link to comment Share on other sites More sharing options...
RightsBlue Posted May 13, 2021 Author Report Share Posted May 13, 2021 thank you so much! I'm sorry, I made a mistake in the extension. I'm sorry, I changed it to a jpg file. Quote Link to comment Share on other sites More sharing options...
Adamw Posted May 14, 2021 Report Share Posted May 14, 2021 Your wiring in the .xlsx file appear to be mostly correct, But I think there are potentially 2 small mistakes:As Pin A19 - I think this is just a signal from the igniton switch to tell the ecu that the engine is cranking. This should be connected to a digital input, not an aux output. Pin A7 & A8 (Aux 4) - I think this is actually to control the fuel pump relay, not the main relay. As for the crank and cam sensor not working, my only thought is from the wiring diagram it is not clear which pins are ground and which pins are signal. So it maybe worth trying to swap D5 with D6 and swap D10 with D9 as sometimes you will find the sensor, wiring or factory ecu connects one of those pins to ground. RightsBlue 1 Quote Link to comment Share on other sites More sharing options...
Mach Posted May 14, 2021 Report Share Posted May 14, 2021 18 hours ago, Adamw said: I will also ask user @Mach if he can maybe offer any help, I know he has a E07Z engine with a Link ECU so maybe he has some advice or knowledge. Hello. I'm using LINK ECU by piggy back and sensor inputs are branched off from the factory ECU. Therefore, I am sorry that I don't have much advice for wiring. In temperature calibration, "Honda Type A" should be available. in Japanese: 私はLINK ECUをサブコンとして利用しており、センサー信号は純正ECUから分岐させています。 そのため、申し訳ないですが、配線に関してはあまり参考にならないかと思います。 温度センサーの校正テーブルについては、"Honda Type A"が適合するはずです。 RightsBlue 1 Quote Link to comment Share on other sites More sharing options...
Mach Posted May 15, 2021 Report Share Posted May 15, 2021 I got it! Is the GND connected right? I think you need to connect LG1(A26) and LG2(A24) to the GND. And make sure PG1(A4) and PG2(A2) are also connected to GND correctly. Adamw and RightsBlue 2 Quote Link to comment Share on other sites More sharing options...
RightsBlue Posted May 17, 2021 Author Report Share Posted May 17, 2021 I tried to remake it with reference to the advice. I decided to let the positive side of the trigger flow from the normal ECU. If there are no fatal flaws here, try this one. harness 2.xlsx Quote Link to comment Share on other sites More sharing options...
Mach Posted May 17, 2021 Report Share Posted May 17, 2021 Unless you have a special reason, there is no need to keep the normal ECU. The trigger pinout seems to be correct before the change. It would be reluctor sensor, therefore no voltage would be output when the engine isn't running. (However, you may need to switch the +/- because Honda engine has reversed rotation direction.) I think the connection of LG1/2 is to GND (not shield). The wiring is different from my vehicle, so I am not sure. RightsBlue 1 Quote Link to comment Share on other sites More sharing options...
RightsBlue Posted May 21, 2021 Author Report Share Posted May 21, 2021 It was exactly what you said. I was able to read the voltage of the crank and cam. (21/05/26 edit) It was a mistake on my software side. The sensors were working properly. Thank you very much for your advice! Quote Link to comment Share on other sites More sharing options...
RightsBlue Posted September 6, 2021 Author Report Share Posted September 6, 2021 It's been a long time. I'm having trouble with the fuel pump not working. I think it's a wiring or ECU settings problem, do you have any idea? ・i checked the main relay and fuel pump. also confirmed that it works with a genuine ECU. Quote Link to comment Share on other sites More sharing options...
Adamw Posted September 6, 2021 Report Share Posted September 6, 2021 If A2 & A4 are grounded and you set aux 4 to "test (on)", does the fuel pump run? RightsBlue 1 Quote Link to comment Share on other sites More sharing options...
RightsBlue Posted September 7, 2021 Author Report Share Posted September 7, 2021 It doesn't work. Quote Link to comment Share on other sites More sharing options...
Mach Posted September 7, 2021 Report Share Posted September 7, 2021 Is the driver type of AUX4 set to Low Side? Are the other AUX outputs (e.g. warning light) working properly? RightsBlue 1 Quote Link to comment Share on other sites More sharing options...
RightsBlue Posted September 7, 2021 Author Report Share Posted September 7, 2021 6 hours ago, Mach said: Is the driver type of AUX4 set to Low Side? Are the other AUX outputs (e.g. warning light) working properly? Aux4 set to Low side. All other AUXs are working properly. Quote Link to comment Share on other sites More sharing options...
Mach Posted September 7, 2021 Report Share Posted September 7, 2021 Check the voltage between A7/A8 and GND when power is on. If there are voltage, the wiring would be correct. Quote Link to comment Share on other sites More sharing options...
RightsBlue Posted September 8, 2021 Author Report Share Posted September 8, 2021 9 hours ago, Mach said: Check the voltage between A7/A8 and GND when power is on. If there are voltage, the wiring would be correct. There was no voltage. I fixed it right away and it worked fine. appreciate. Quote Link to comment Share on other sites More sharing options...
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