Was told that the hicas pump may be faulty. There for could be causing overload and blowing the fuse. It seemed to go on when going up the hills giving the z a bit of stick around the bends just last week. If so whats the best way to test if this is the problem.
Hey It doesn't explain the other issues you were having such as higher than normal RPM or the light on warning indicator coming up, however I could see where they are coming from as it would explain the other anomalies, perhaps the other little things are just coincedance. You need to first set the ECU to self diagnostic HICAS mode - this will do the 1st step diagnostics and give you an idea of whether its involved. I believe you need four wheels off the ground to do this (from memory) Make sure you turn it off HICAS diagnostics when completed! JC
Hicas pump and the power steering pump is the same thing. They are all in 1. Also it is mechanical not electronic. Keep looking.
What is this fuse that keeps "blowing"? If it has anything to do with the PS/Pump, it is most likely the Low Oil Level Warning Light(for the PS Reservoir), that comes on from time to time.
There are electrical speed solenoids in HICAS Not quite correct - The speed fluid solenoid is electrical on the front and the back maybe Super HICAS. These could be problems affecting as stated. Bigmax - disconnect the electrical connector that is near the hydraulic rack where the speed solenoid is and near the power supply reservoir and replace the fuse and see if your problems go away (the fuse will not blow but the HICAS light will remain on - idle will not be affected)- this will tell you quickly if its a problem. (it could be shorting out before/ in between or after - hence why disconnecting at both) Fault codes may or may not be logged in the ECU so ideally you need to conduct the HICAS Diagnostic just to make sure everything is working properly - (plugged back in) - it will tell you if there is a problem with the solenoid in action or any other part of the HICAS operation. There is a manual in the tech section - if your not sure where the connectors are - look under steering section and follow the procedures in there. Hope that is more helpful than my previous answer JC
Not quite correct SuperZ. He says the pump may be faulty. Not sensors. Replace the pump, and fund the sensors in the rack is still buggered, not fixing anything.
You need to read his other posts mate - there is a link between what is happening here - pumps don't cause the blowing of a fuse per se. If the sensor is faulty and short circuiting (and this makes sense)- this can cause the pump solenoid to activate all the time causing the problems he has mentioned as well as the fuse blowing - someone has looked at this already and had a guess and they may indeed be on track! Originally I could only think of the ECU being the link but the pump does have inputs from the ECU - The problem may not be with the pump at all but the speed fluid solenoid which can cause the pump to appear faulty and be on full load all the time - there is really not much that can go wrong with the pump being mechanical, so its unlikely to be the pump itself blowing the fuse but if the speed solenoid is short circuiting - everything he described could happen (except for the high idle - but this may just be a coincedence) Go off my previous message mate - you will at least know where to head from there. JC
