Delp76 Posted September 9, 2020 Report Share Posted September 9, 2020 Hi all I've posted couple of threads recently about my car not tracking straight. My question is does a zero point calibration done after wheel alignment. Yaw rate and deFirst place I took to couldn't do it with there scanner once plugged in scanner did not recognise the car. Doing that I ended up with ABS and VSC light on but they got it off. Quote Link to comment Share on other sites More sharing options...
Tony Posted September 9, 2020 Report Share Posted September 9, 2020 Hi, what actual problems do you have? Quote Link to comment Share on other sites More sharing options...
Delp76 Posted September 9, 2020 Author Report Share Posted September 9, 2020 Steering wheel off centre. Pulling to the left. Tyre pressure checked regular. I'm going back to the alignment place to ask them retrack but I'm not sure about the zero point calibration. Quote Link to comment Share on other sites More sharing options...
Delp76 Posted September 9, 2020 Author Report Share Posted September 9, 2020 I found this whilst searching through various forums. Reading this a calibration is required. https://www.clublexus.com/forums/ls-3rd-gen-2001-2006/921994-diy-ls430-steering-wheel-centering-zero-steering-angle-point.html Quote Link to comment Share on other sites More sharing options...
Tony Posted September 10, 2020 Report Share Posted September 10, 2020 Lock to lock with the reset system activated should reset the centre point but remember this not a mechanical correction it's a centre point calibration which is actually born from the rear. Quote Link to comment Share on other sites More sharing options...
Delp76 Posted September 10, 2020 Author Report Share Posted September 10, 2020 49 minutes ago, Tony said: Lock to lock with the reset system activated should reset the centre point but remember this not a mechanical correction it's a centre point calibration which is actually born from the rear. So is lock to lock done after steering angle sensor reset? As I'm going to the alignment place once again tomorrow. And they said they would recheck alignment but can't do SAS. Would you recommend I do.. Quote Link to comment Share on other sites More sharing options...
Tony Posted September 13, 2020 Report Share Posted September 13, 2020 Most cars re-set the steering angle sensor with lock-to-lock. Some cars need to be plugged in and re-set via the ECU Quote Link to comment Share on other sites More sharing options...
Delp76 Posted September 15, 2020 Author Report Share Posted September 15, 2020 Does the lock to lock need to be done straight after alignment before car is driven or can it be done afterwards. Quote Link to comment Share on other sites More sharing options...
Tony Posted September 16, 2020 Report Share Posted September 16, 2020 After adjustment with the engine running. Quote Link to comment Share on other sites More sharing options...
Delp76 Posted September 16, 2020 Author Report Share Posted September 16, 2020 Well the alignment place didn't do mine. So I guess no point doing it know.. Quote Link to comment Share on other sites More sharing options...
Tony Posted September 16, 2020 Report Share Posted September 16, 2020 I'm not sure if your car is self learning... If not then we would need to plugin the ECU and force the sensor to find the car's centreline?..... All cars that are adjustable at the rear then after the toe adjustment will change the cars centre line. AKA Thrust angle. If a car with bad thrust but not adjustable due to the design we would attempt to move the rear beam, reason is most cars are not a surgically built. Failing that we would turn off the rear thrust angles reference point.. Most tyre shops think aligning the front wheels is measured by each front wheels... But it's not! The front wheels datum point is from the rear, namely the Thrust angle. Quote Link to comment Share on other sites More sharing options...
Delp76 Posted September 16, 2020 Author Report Share Posted September 16, 2020 Latest before and after reports. I know the rear cambers not quite there because they said once again the bushes inside are turning too much not allowing full adjustment. What you make of this. Quote Link to comment Share on other sites More sharing options...
Tony Posted September 17, 2020 Report Share Posted September 17, 2020 The final report is very good Quote Link to comment Share on other sites More sharing options...
Delp76 Posted September 17, 2020 Author Report Share Posted September 17, 2020 Even the the rear camber not quite there. Still pulling to left and steering wheel off centre. They said they couldn't reset SAS as there scanner wouldn't allow it. I've been in touch with other Lexus GS owners and they said SAS there cars after alignment were never done. I'm not sure were to look next. Tony you said that reports good. But what next, Quote Link to comment Share on other sites More sharing options...
Tony Posted September 18, 2020 Report Share Posted September 18, 2020 Assuming the tyres are moved with no result then i would set the steering manually? I would mark each steering arm, rotate one half a turn in and the other half a turn out. no need to re-measure the geo until the steering position is level. call it fine-tuning. Quote Link to comment Share on other sites More sharing options...
Delp76 Posted September 18, 2020 Author Report Share Posted September 18, 2020 You mean the toe? Quote Link to comment Share on other sites More sharing options...
Tony Posted September 19, 2020 Report Share Posted September 19, 2020 Ok let's explain this better. If? the steering position is down to the left then i would adjust the toe NSF out "negative" or let's say half a turn, and then the OSF out half a turn in or "positive". Assuming this works then it needs to go back on the machine for fine-tuning. Quote Link to comment Share on other sites More sharing options...
Delp76 Posted September 19, 2020 Author Report Share Posted September 19, 2020 Hi Tony can you check if the Lexus Gs430 2003 does actually need the SAS reset after alignment. Two places I took to and they said there computer didn't tell them to reset. But to be fair one garage tried with scanner but couldn't do. Second place tried it but scanner also didn't come up with it. If this only main dealer can do it. Just wondering if after an alignment at your place would your machine tell you to check.. Quote Link to comment Share on other sites More sharing options...
Tony Posted September 20, 2020 Report Share Posted September 20, 2020 Sure i can check tomorrow. After each measurement and adjustment has the steering position changed? Another point, was there a time when the steering was straight and then went off-line. If yes what happened in between? Quote Link to comment Share on other sites More sharing options...
Delp76 Posted September 20, 2020 Author Report Share Posted September 20, 2020 4 hours ago, Tony said: Sure i can check tomorrow. After each measurement and adjustment has the steering position changed? Another point, was there a time when the steering was straight and then went off-line. If yes what happened in between? The position of steering wheel has been sitting off center to every time I've had adjusted and been back. It's always been off centre as far as I can remember. I still think the SAS has to be reset. As that last report is the best it's been since having all the adjustment. Be good to know if the manufacturer says it must be reset after alignment. I await your reply. Quote Link to comment Share on other sites More sharing options...
Delp76 Posted September 20, 2020 Author Report Share Posted September 20, 2020 Is it possible that the actual steering wheel needs centering from the shaft. I mean rake steering off and adjust to sit in the centre. Quote Link to comment Share on other sites More sharing options...
Tony Posted September 21, 2020 Report Share Posted September 21, 2020 No.... Please don't remove the steering wheel.... All that will do is a visuel repair rather deal with the actual problem. Take it this way..... If you cook it going into a bend the steering sensor won't help because the information it has regarding the steering position is wrong. Life- VE- death. Quote Link to comment Share on other sites More sharing options...
Delp76 Posted September 21, 2020 Author Report Share Posted September 21, 2020 I wasn't going to do that. Just getting frustrated know after so many alignments and still pulling. Did you look into the SAS reset Tony. Quote Link to comment Share on other sites More sharing options...
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