Jump to content
SAU Community

Recommended Posts

Yesterday i noticed that the Hicas light was coming on when driving prior to this the battery light was coming on until i gave her a rev and drove her for a bit, then when i turned her off she wouldnt start i managed to get her jump started and just got her home with the car cutting in and out, this morning i went to start her and started fine and i drove her for a bit and she was still fine then the battery light and hicas light started again, is this the alternator??

Link to comment
https://www.sau.com.au/forums/topic/149187-hicas-light-comes-on-while-driving/
Share on other sites

Could be several things, maybe combined, maybe not !

Start with getting the battery checked then move on to the altenator. Next go to the air flow meter. There a bunch of connecting pins inside it that the soldered connections fail. I know this happened to mine. Also after all that check out your fuel pump to see if it aint on its last legs. Also the hicas light some times comes on if at some stage the fluid in the power steering resivour is low.

Hope this helps

i also have a problem with my hicas light coming on, tends to come on only when ive been driving for a while, especially at a speed of 80km/h +. Would this be a cause of low power steering fluid of is my case different?

Cheers,

Steve.

Yesterday i noticed that the Hicas light was coming on when driving prior to this the battery light was coming on until i gave her a rev and drove her for a bit, then when i turned her off she wouldnt start i managed to get her jump started and just got her home with the car cutting in and out, this morning i went to start her and started fine and i drove her for a bit and she was still fine then the battery light and hicas light started again, is this the alternator??

hi

my guess is your alternator is on its way out, probaly run out of brushes if your car has over 80k on the original alternator, the hicas light coming on is a symptom of low voltage, the hicas computer will reset and the light will come on then go out, the way to verify it is, there will be no fault code even tho the light has been on.[btw low fluid also has no fault code just the light on but your power steering will still work wheras during an ecu reset your power steering drops out.

Create an account or sign in to comment

You need to be a member in order to leave a comment

Create an account

Sign up for a new account in our community. It's easy!

Register a new account

Sign in

Already have an account? Sign in here.

Sign In Now


  • Similar Content

  • Latest Posts

    • I feel I should re-iterate. The above picture is the only option available in the software and the blurb from HP Tuners I quoted earlier is the only way to add data to it and that's the description they offer as to how to figure it out. The only fields available is the blank box after (Input/ ) and the box right before = Output. Those are the only numbers that can be entered.
    • No, your formula is arse backwards. Mine is totally different to yours, and is the one I said was bang on at 50 and 150. I'll put your data into Excel (actually it already is, chart it and fit a linear fit to it, aiming to make it evenly wrong across the whole span. But not now. Other things to do first.
    • God damnit. The only option I actually have in the software is the one that is screenshotted. I am glad that I at least got it right... for those two points. Would it actually change anything if I chose/used 80C and 120C as the two points instead? My brain wants to imagine the formula put into HPtuners would be the same equation, otherwise none of this makes sense to me, unless: 1) The formula you put into VCM Scanner/HPTuners is always linear 2) The two points/input pairs are only arbitrary to choose (as the documentation implies) IF the actual scaling of the sensor is linear. then 3) If the scaling is not linear, the two points you choose matter a great deal, because the formula will draw a line between those two points only.
    • Nah, that is hella wrong. If I do a simple linear between 150°C (0.407v) and 50°C (2.98v) I get the formula Temperature = -38.8651*voltage + 165.8181 It is perfectly correct at 50 and 150, but it is as much as 20° out in the region of 110°C, because the actual data is significantly non-linear there. It is no more than 4° out down at the lowest temperatures, but is is seriously shit almost everywhere. I cannot believe that the instruction is to do a 2 point linear fit. I would say the method I used previously would have to be better.
×
×
  • Create New...