Possible causes for heavy steering.. IE no power steering Low on fluid, checked Bung pump? Anything electrical that could turn it on off? wiring, fuses? Hicas stuff? Only really familiar with NA pumps etc
Like no power steering at all? Needs HEAPS of muscle to get it moving at all? If still sort of works there is an actuator on the rack, if it's damaged or disconnected it will give you heavy steering. Also a dead HICAS control unit will do the same.
Semi heavy. The plugs at rack are def hooked up but i think the speed sensor or such? might be the issue... speedo works but very laggy and slow which sounds like it connects
yep hicas control unit (right of ecu) controls how much power gets to the p/s. check the inputs and outputs. If you look in the manual it provides the characteristics for how the p/s is affected (eg. speed) and defines the inputs/outputs.
I had similiar problem with a Supra, had me stumped for days, checked everything, I rebuilt the pump, pressure tested it etc..... Ended up being a partially blocked gauze in the PowerSteering fluid canister... When I looked at it it appeared to be pretty clean, until i ripped it out and it was all gunked up. Idk.. Might be a long shot..
