VincentB Posted April 15 Report Share Posted April 15 Hi guys, I have a trouble with my vtec solenoid on a b18c4 engine. My ecu it’s an hc92x so the AUX5 should be the good one for driving the solenoid, my harness it’s an rywire obd1. I checked continuity between A4 to the end of the one lead vtec connector and its good. I checked my résistance from the solenoid i have 23 ohm so it’s good. I checked if the solenoid click when I connect a 12v to the connector and it’s also good. But if I test on pwm with the pclink nothing happen, no power… Is it possible my aux5 are out ? Thank you thanks Quote Link to comment Share on other sites More sharing options...
Vaughan Posted April 15 Report Share Posted April 15 Can't check the schematic right now but pretty sure the Aux is supposed to be driven low and that there is a FET on the bottom board to make the actual output high side. Quote Link to comment Share on other sites More sharing options...
Adamw Posted April 16 Report Share Posted April 16 Yes, it should be set as per Vaughans picture, the civic plug-in has a separate high-side drive circuit for aux 5 & 6 on the adapter board. Quote Link to comment Share on other sites More sharing options...
VincentB Posted April 16 Author Report Share Posted April 16 Alright thanks you I will try that today ! Quote Link to comment Share on other sites More sharing options...
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