Just had boost controler fitted with ecu upgrade by dyno demonds in ellesmere port,when collected the car noticed Hicas warning light was on so questioned this and was told when they put the car on the rolling road to set up boost this would of happend then and the light should go out?

Light is still on after driving home 20 miles.

Has this happend to anyone else when putting there car on dyno?

They have told me if the light stays on to ring them.

Check you PS fluid levels, the HICAS light comes on when this is low. Haven't heard of a dyno run causing the light to come on :confused1:

When the guy came back out to see the light on he checked the level and it was ok.

cheers.

When the guy came back out to see the light on he checked the level and it was ok.

cheers.

 

Not sure then mate, don't worry an expert will be along to help soon.

Never heard of this either, could be like ABS and thrown a paddy because the rears are registering speed but no steering??

Pull the Batt lead off for an hour,reconnect then see if it goes out.

Something a miss here. After a 20mile ride home the light will have gone out if it was just something like the ABS having a paddy. When I had my car dyno'd I had no issues with the HICAS light. The ABS light came on whilst dyno'd because front wheels not turning while back ones doing upto 100mph - normal reaction and light went out within moments of normal driving.

Check the fluid level yourself from cold. Fluid loss or leaks is the main cause of the light coming on.

If OK check the connection at the actual cap top and loom connector.

If thats OK then have a look at the main ecu connector under the pass side carpet. If they have done an ecu upgrade then they will have removed this to replace the chip and socket it etc. Maybe when they have refitted it they have overtightened the connector (held in place by 10mm?? bolt). If overtightened it can bend this connector and this can create bad connections! The main ecu will talk to the PAS/HICAS ecu thru this loom. If so slacken the bolt and make sure it looks good, straight and home.

If that looks ok then check the PAS ecu as its close to the main ECU - its possible they have disturbed it, but unlikely.

After that I would be looking at where the boost controller is plumbed in and where its wired into the cabin. Maybe if done close to the steering wheel they have disturbed the wheel angle sensor or something. My first suggestions are more likely though.

Edited August 31, 201015 yr by turbocraigy

Thanks for that guys will have ago today at your suggestions.thanks gray