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Elite Member
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Join Date: Feb 2011
Location: Bend, OR
Posts: 9,902
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Elite Member
Join Date: Feb 2011
Location: Bend, OR
Posts: 9,902
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You did not specify what year and trim your 4Runner is, I safely assuming it is a 4WD since you talk about the CV Axles.
The problem you are describing sounds eerily similar to a 2013 Scion FRS I recently worked on. It had the same issue with setting a DTC in the ABS system when the steering wheel was turned to 356.4 degrees to the left, everytime you did this the communciation between the module and the sensor would lock up and after a key cycle the system would lock up at 0 degrees with no change. Turned out the steering angle sensor had a bad spot and when it hit that spot it would just logic lock the system for the EPS.
Our 4Runners do have a steering angle sensor in the steering column and while highly rare for it to go bad (you'd be the first I have heard of, though I have another member on the T120 Forums talking to me about something possibly similar after an accident he had), I have a feeling there's an issue either at the sensor or the circuit that is confusing the system.
If you can scan the vehicle again when the light comes on, I'd like to know what the DTCs set are when you turn the steering wheel. The next thing I'd do is pull up the DataList and see if you can find the Steering Angle Sensor input (this would most likely be in the ABS Module) and watch it as you turn the steering wheel all the way to the left and right slowly; I have a feeling you'll see an anomally as you do this.
Last edited by BlackWorksInc; 11-05-2013 at 03:21 PM.
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