Wheel slip sensor is killing the throttle
 

hi folks
my 2013 370 roadster 6mt is cutting out my throttle. I see the yellow slippery light coming on when I know the wheels are not breaking loose. I turned off the traction control, and it still cuts the throttle. Anyone know where the sensor is, an/or how to bypass it? Any help would be appriciated. It doesn't matter if it's cold or warmed up, it cuts the throttle.
Thanks folks
Sully

Several conditions can activate "torque control". Only one is wheel spin. The other is dynamic stabilty control which is triggered by the lateral G-sensor ("yaw" sensor) in the centre of the car, under the cup-holder behind the gear stick.

Does this occur with steering lock on ?

If so, the electronic nannies are thinking that you are about to provoke a rear-axle slide and invokes "torque control".

If not, then the rear wheel speed sensors have detected a rotational speed difference between at least 1 rear wheel and 1 front wheel (the speeds only need to be different by >3% or so).

Have you recently changed tyres and installed different sizes to OEM? If so, the diameters might be right on the margin that the stability control can tolerate and literally the slightest wheel spin trigger's intervention.

Search the forum for ways to install a switch that turns this feature off - look for "yaw sensor switch" - there are several articles and the most recent one I saw was a great write-up with lots of photo's.

There are a couple of things for you to consider.

Thanks BG for the quick reply. I have not had this issue happen with the steering wheel locked. It does happen at any speed, pretty much every gear. The tires are stock sizes, and have been on the car for over a year. I'm thinking it's probably the lateral G sensor you mentioned. I have a 2008 G37 that lost a fight with a deer, so I can hopefully find a replacement on it. I'm going to check out the articles you suggested. Again, Big Thank You!

Sorry - perhaps I was not clear - I meant "had you provided any steering input and the car was turning at the time" - would never suggest driving a car with the "steering lock" engaged

IIRC, a low brake fluid level can cause these symptoms. Make sure the reservoir is filled to the full line.

First question I would ask is whether the car is actually cutting throttle power or if the dash light is simply lighting up. Low brake fluid will typically cause the BRAKE (for the e-brake) and SLIP lights to illuminate - normally this occurs under acceleration or braking as the fluid sloshes back and forth in the reservoir. But this issue does not actually interfere with the throttle.

Check your brake fluid level. if it gets even a little bit low, it can induce this,

IIRC the yaw sensor doesn’t cut the throttle, it applies the back brakes. I just replaced the back brake pads at 35,000 miles due to (I think) this. Front pads are still at 60 %.

It certainly feels like it’s cutting the throttle, but it’s not. Especially if you have the TC off.