The issue started about 3 weeks after the Dyno to give a timelapse, car is daily driven +/- 1000km/week.
Turned the key off and fan stayed on (figured the engine was still hot and there was a safety making them cool a little longer) , didnt think much of it at first. Went to my car later: battery died so i started investigating.
Checked everything and found out that both my fans AND my fuel pump were cycling ramdomly when ignition is OFF. (Tested my relays and the ecu is giving me ramdom grounds for both outputs when OFF) Wiring is fine for both accessories. What can cause the Ecu to do this. (No laptop has been connected since the tune so the prog hasnt changed since my tuner did his job )
Thanks for the help!
Toyota Mark II 1993
1jz non vvti , stock harness with jzx90 PNP adaptor. Fuel control module delete(running 12v relay to cycle on off directly from ecu output)