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JT brought over his scanner.
Nuthin'. Just a stored code from the brake pedal position sensor, which we cleared.
With his Tech-2 plugged in, we drove around the block a few times.
Steering wheel sensor shows correct readings.
Yaw and Lateral Accelerometer shows correct readings.
Brake pressure sender shows correct readings.
Voltage?
Dash says 14.5 steady. Radar detector shows 13.6 fluctuating up and down 0.2.
Tech-2 says 14.4 and fluctuating up and down 0.2.
So I yank the battery and tray to check the body ground under the tray.
Aside: the plastic battery tray is held to a metal tube by FOUR bolts. Overkill.
It's crusty down there.
Shine everything up.
Reassemble.
Dash says 14.4 steady. Radar detector shows 13.9 steady. No Tech-2 reading.
Fingers crossed.
Also check wheel hub assemblies and wheel speed sensors.
ReplyDeleteException to anon comment policy made here, next time sign your post.
DeleteI didn't mention that we did check them with the Tech-2 while doing the test drive, they were operating correctly.
We were not concerned about them because the service manual's listing of symptoms that had a hub sensor problem also said that traction control or anti-lock braking (or both) would also be affected.
Traction control and ABS were still active with my failure, which significantly narrowed the list of culprits.
Because I'm a pessimist, I went straight to the expensive throw parts at it solutions when all of the instructions in the service manual say to check wiring. A bad ground is in the "check wiring" spectrum.
Fingers crossed.