Mindfreakattack Posted August 23, 2021 Report Share Posted August 23, 2021 Hi guys, i am trying to rig up my AEM Wideband to the ECU for logging. I had the Grd and Signal connection connected from the Guage to the ECU as shown in the picture. For set up, i selected AEM Wideband UEGA. But unable to get a correct reading. The AFR just freeze at 1 lambda May i know if theres any known fault for wiring AEM to G4+? Or any knock fault for the current AEM UEGA calibration? Quote Link to comment Share on other sites More sharing options...
Adamw Posted August 23, 2021 Report Share Posted August 23, 2021 Lambda 1 is the error value you have set. So it will default to lambda 1 anytime the voltage on AN V8 is above 4.95V or below 0.05V. So what voltage do you have on those wires when the ecu is showing 1.00 lambda? What is the part number for your wideband? Quote Link to comment Share on other sites More sharing options...
Mindfreakattack Posted August 23, 2021 Author Report Share Posted August 23, 2021 Aem 30-0334 is the one im using Will get back on the voltage reading later. Quote Link to comment Share on other sites More sharing options...
Mindfreakattack Posted August 24, 2021 Author Report Share Posted August 24, 2021 Hi, so i checked the voltage using multimeter, the voltage was 0 with the wideband guage showing 14.7 at idle. so i guess my wiring is causing the issue. I tried removing the connector (i diy-ed out of electronic pins) from the ECU expansion slot, it measured zero, so i measured the voltage coming out from the AEM guage (the supposed signal sender form AEM to ECU) and it measured 1.16 to 1.2v. Anyway may i check what the error value im supposed to have for my AEM x series? Quote Link to comment Share on other sites More sharing options...
Mindfreakattack Posted August 24, 2021 Author Report Share Posted August 24, 2021 May i also confirm i need to connect the -ve signal from the AEM guage to the ecu sensor ground on expansion slot to make it work? Quote Link to comment Share on other sites More sharing options...
Adamw Posted August 24, 2021 Report Share Posted August 24, 2021 Yes the AEM analog ground needs to be connected to the ECU sensor ground. The main AEM power ground (usually black wire) should not be connected to the ecu, this should go to chassis or engine block. Quote Link to comment Share on other sites More sharing options...
Mindfreakattack Posted August 26, 2021 Author Report Share Posted August 26, 2021 So i rerouted the wideband to a another switched fuse.. changed a new know good grounding on chassis. And the voltage still ready 1.7v (12.5afr) to 1.2v (14.2afr) the figure dun even make sense to me. Anyome have any idea? Quote Link to comment Share on other sites More sharing options...
Adamw Posted August 26, 2021 Report Share Posted August 26, 2021 Im not sure what your question is? Does the voltage not match what AEM state it should output? Quote Link to comment Share on other sites More sharing options...
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