I like.
HICAS ECU has speed input from dash? (trace the wiring to front of car to confirm) and HICAS ECU sends a signal to a valve on drivers side of steering rack (from memory it has wiring to valve, so should be easy to spot) that adjust's the amount of powersteering assistance. When HICAS ECU goes into limp mode or doesn't work properly the assistance is as much as you would get at 180-200km/h, so the steering would be heavier at lower speeds only.
If can find a way to send a signal to that valve to adjust the valve closed as speed rises (maybe a window switch or similar for speed that closes the valve), can eliminate HICAS ECU. Otherwise most earth all sensors, etc to HICAS ECU (makes HICAS ECU think the sensors, etc are still there) and use HICAS ECU for that job.
There is a line graph on the internet somewhere showing powersteering assistance vs vehicle speed (I gather what's programmed into HICAS ECU).
Can buy a Tomei HICAS lock kit that has this wiring part done for you (HICAS ECU) -
Originally posted by S13Jordie
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If can find a way to send a signal to that valve to adjust the valve closed as speed rises (maybe a window switch or similar for speed that closes the valve), can eliminate HICAS ECU. Otherwise most earth all sensors, etc to HICAS ECU (makes HICAS ECU think the sensors, etc are still there) and use HICAS ECU for that job.
There is a line graph on the internet somewhere showing powersteering assistance vs vehicle speed (I gather what's programmed into HICAS ECU).
Can buy a Tomei HICAS lock kit that has this wiring part done for you (HICAS ECU) -
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