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Sh-awd- vsa light came on after hitting a bump . no power to rear wheels just running in front wheel drive. everything else is fine??? car sat for 24 hrs and lights went off until put in reverse and lights popped back on

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Posted on Jan 02, 2017

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SOURCE: VSA,SH/AWD AND ABS INDICATOR ALL ON

Not positive, but i think its because of the TPMS (tire preasure monitoring system) on the car. If the tpms valve stems were removed and replaced with normal valve stems then the car will register 0 psi in the tires, causing the alarms. Once again im not a mechanic but i think thats what your problem is.

Posted on Mar 18, 2009

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1 Answer

Rear wheels not engaging what can I do to troubleshoot the awd?


awd drive cars have a differential action between front and rear wheels and there should be a switch that allows you to lock up that action for adverse conditions
if the rear wheels are not working , it is because there is no drive action to the front wheels ( front wheels spinning or broken drive shaft to the front)
all wheel drive means that in normal driving when there is traction on all 4 wheels that the power is transmitted evenly to all 4 wheels
It is not 4 wheel drive where power is applied to both axles or in the event of one axle loosing traction the other axle still drives

Dec 15, 2015 | 2007 Lincoln MKZ AWD

1 Answer

I was driving my 2007 acura rdx when I noticed the sh-awd light on. I then saw the check engine light on. Later when I turned my car on again the check engine light was still on, not the sh-awd light. ...


The SH AWD uses electromagnetic clutch in the back drive axle to change the power distribution to the rear wheels. It would have nothing to do with the P0171 error. What TPMS valve stem was bad? Because this could be a clue to what the problem is. If a rear tire is having issues it could cause the sensor to make adjustments to the system to compensate for the tire. The person that changed the TPMS might have also caused the issue when they worked on the tires.

Sep 26, 2014 | Cars & Trucks

1 Answer

Durango AWD


The vehicle is always in AWD and that cannot be altered . There is a 3rd diff in the gear box that allows independent operation of the front and rear wheels to prevent drive line wind up . When you select 4WD you lock up that 3rd diff so that both front and rear axles have to turn. This results in drive line torque wind up so the vehicle must not be driven in this mode on hard surfaces as there is no means for the wheels to slip and relieve the torque wind up . To loose the wind up reverse for several yards and any actuators that are trying to move will be able to or drive on slippery surfaces to allow the wheels to slip

Mar 08, 2014 | 2001 Dodge Durango

1 Answer

WHATS IS THE MEANING OF VAS


Standard Vehicle Stability Assist™ (VSA ®) with Traction Control and Brake Assist Vehicle Stability Assist (VSA) is an electronic stability control system that works in conjunction with the Pilot's drive-by-wire throttle and its 4-channel ABS systems to enhance controllability while the vehicle is accelerating, braking, cornering or when the driver makes a sudden maneuver. VSA functions by applying brake force to one or more wheels independently while also managing the throttle, ignition and fuel systems to help the vehicle maintain the driver's intended path of travel.

The VSA system constantly analyzes data from seven sensors that monitor wheel and vehicle speed, steering input, lateral G forces and yaw rate. It compares the driver's control inputs with the vehicle's actual response. Whenever the actual response falls outside of a predetermined acceptable range, VSA intervenes with a corrective action.

For instance, if VSA detects an oversteer condition, the system may apply braking force to the outside front and rear wheels to counteract the unintended yawing effect. In the event of understeer, VSA may apply braking to the inside rear wheel while reducing engine power to help return the car to its intended course. VSA also provides a limited-slip differential effect for the front wheels by applying braking force to a slipping wheel, thereby redirecting driving force to the wheel with more traction.

There is a button on the lower left part of the dashboard that says "VSA". Push it and the triangle will dissappear (this should only be turned off if you are using a spare tire that is smaller than the rest of the tires).

Good luck.

Mar 10, 2010 | 2008 Honda Ridgeline

1 Answer

What does the warning light of a yellow triangle and an exclamation point mean


Standard Vehicle Stability Assist™ (VSA ®) with Traction Control and Brake Assist Vehicle Stability Assist (VSA) is an electronic stability control system that works in conjunction with the Pilot's drive-by-wire throttle and its 4-channel ABS systems to enhance controllability while the vehicle is accelerating, braking, cornering or when the driver makes a sudden maneuver. VSA functions by applying brake force to one or more wheels independently while also managing the throttle, ignition and fuel systems to help the vehicle maintain the driver's intended path of travel.

The VSA system constantly analyzes data from seven sensors that monitor wheel and vehicle speed, steering input, lateral G forces and yaw rate. It compares the driver's control inputs with the vehicle's actual response. Whenever the actual response falls outside of a predetermined acceptable range, VSA intervenes with a corrective action.


For instance, if VSA detects an oversteer condition, the system may apply braking force to the outside front and rear wheels to counteract the unintended yawing effect. In the event of understeer, VSA may apply braking to the inside rear wheel while reducing engine power to help return the car to its intended course. VSA also provides a limited-slip differential effect for the front wheels by applying braking force to a slipping wheel, thereby redirecting driving force to the wheel with more traction.

There is a button on the lower left part of the dashboard that says "VSA". Push it and the triangle will dissappear (this should only be turned off if you are using a spare tire that is smaller than the rest of the tires).

Good luck.

Mar 02, 2010 | 2005 Honda Pilot

3 Answers

AWD


The AWD feature is on all of the time and can not be turned off.

Dec 10, 2009 | 2006 Pontiac Vibe

1 Answer

Volvo S60 AWD 2.5- car pulls sideways when driving on rain or sno


It's probably not that the wheels are moving at a different speed. It sounds like a simple alignment issue to me. Installing a bearing could have thrown it off. You should just have a simple alignment job done.

Jan 08, 2009 | 2002 Volvo S60

1 Answer

Lost rear traction on 03 Impreza AWD


I have the same car. Mine is automatic. What is yours?

Possible scenarios:

1/ Is the FWD on the dash panel lit up? This will tell you that only the front wheels are engaged without power to the rear wheels. The manual tells you if you have a flat tire in your car, you have to make it into a FWD by inserting a fuse in your fuse box. Check and see if the circuitry isn't shorting out your awd which is making it fwd.

2/ Because the car has open diffs in the front and rear axles, you (or your friend) might see only the front wheels spinning and not the rear wheels. The power is transfered to the wheel with lowest resistance. With the front wheel spinning, one of the rear wheel(s) should also spin. Might not be a solution but maybe you can't see the rear spinning wheel because it's spinning on the other side.

Nov 30, 2008 | 2003 Subaru Impreza

1 Answer

1999 buick regal


hi when you say hits a bump which wheel is it that hits the bump or is it the ront end hits a bump or rear and what did the fault codes say and what makes you think its not the sensors yates210456

Oct 17, 2008 | 1999 Buick Regal

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