qazw Posted April 15, 2023 Report Share Posted April 15, 2023 Hi Some guidance would be appreciated. I installed the G4x ECU and loaded the basemap. Car starts and runs fine. However my tacho no longer works. It does not move at all hence there is not signal going to it. I did change the tacho settings to other AUX out pins via the PCLink but it made no difference. I did find this thread on a similar issue: but by tacho does not work at all and Aux2 is occupied by Engine Fan 2 What should I do? Thanks Quote Link to comment Share on other sites More sharing options...
Adamw Posted April 15, 2023 Report Share Posted April 15, 2023 What model MX5? and what ECU do you have? Quote Link to comment Share on other sites More sharing options...
qazw Posted April 15, 2023 Author Report Share Posted April 15, 2023 Hi. 1994 MX5NA 1800 Clubman. G4xnax Quote Link to comment Share on other sites More sharing options...
Adamw Posted April 15, 2023 Report Share Posted April 15, 2023 Check the "MX5 1800" jumper near the main header, this controls a pull-up resistor that is part of the tacho circuit, some 1800 models need this and some dont, so if the jumper on your ecu is currently bridging these two pins then remove it, it the jumper is not bridging the two pins then move it so they are bridged. Quote Link to comment Share on other sites More sharing options...
qazw Posted April 15, 2023 Author Report Share Posted April 15, 2023 Thanks. I'll have a look. Totally missed that jumper when I was working with the board. Cheers Quote Link to comment Share on other sites More sharing options...
qazw Posted April 16, 2023 Author Report Share Posted April 16, 2023 That worked. Thanks for your help. Quote Link to comment Share on other sites More sharing options...
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