Last post on Oct 18, 2012 at 4:56 AM
You are in the Toyota Sienna
What is this discussion about?
Toyota Sienna, Electrical, Van
#20 of 24 Re: VSC sudden activation 2004 Sienna [whfh99]
Oct 17, 2012 (7:41 am)
There are only 2 sensors "unique" to VSC, a stearing wheel rotational position sensor and a lateral accelerometer, YAW, sensor. If one of those fails in an undetectable way you will get VSC activation.
Engine dethrottling and rear braking (slow this sucker DOWN) if the system defaults (on failure) to understeering recovery/correction. If it defaults into oversteering recovery/correction mode you still get engine dethrottling but braking ONLY on ONE front wheel.
Obviously this latter scenerio could prove to be the more dangerous.
You can remove the ABS pumpmotor fuse to disable TC, VSC, etc, but that alos disables ABS.
#21 of 24 Re: VSC sudden activation 2004 Sienna [wwest]
Oct 17, 2012 (7:59 am)
Thank you. Sounds like we had the oversteering recovery issue as the braking was on JUST the right front wheel at low speed. Do you happen to know where and which fuse that is? Might be the safer option until we get this looked at? Nothing wrong with driving 'old school'. Do you know if the dealer has diagnostic tests that can definitively determine if one or both of these sensors are faulty? I want to avoid spending money for them to guess or replace parts just for something to do on my dime. Also, heard there was a TSB out there and some people got Toyota to cover the repairs? Anything I can print and bring with me would be helpful.
#22 of 24 Re: VSC sudden activation 2004 Sienna [whfh99]
Oct 17, 2012 (8:22 am)
I did find a service report on line and I printed it out, took it to the dealer, and did not have to pay for the replacement part or service. I made a big deal about the fact that they are fully aware of a dangerous defect and made a conscious decision not to recall the part. I can't find it but will search when I get home tonight.
I now own a VW with an override button. I would not purchase another car without one due to my experience with the Sienna.
#24 of 24 Re: VSC sudden activation 2004 Sienna [fibber2]
Oct 18, 2012 (4:56 am)
Thank you for sharing this information. Guess I'll have to get the vehicle scheduled for service and see how it goes.