ABS - 4WD - LOCK

[gcjazz12]

I'm stopped at a light this morning, it goes green, I go and hit one of Columbus Ohio's ga-zillion pot holes and hear a pop underneath the QX4. The ABS light came on and won't go off. The green lights on the rear wheels of the 4WD display on the dash are out.... the Overdrive was flashing when I was in park - and a 4WD light came on the dash as well. Turned car off and on a few times and the ABS stays on, the 4WD goes out, but comes back on and the the green wheels on the 4WD disappear. I was only running it in 2WD when this happnened. I'm pretty freaked out - any ideas what could be causing these warning lights?

[nickelghandi]

Try simply running the diagnostic for the 4wd system. 4wd-shift-light-blinking-t511144.html
Its towards the bottom of the page. Sometimes when things get knocked really hard it goes into a sort of fail-safe I guess. It happened to me after going to the dealer and the procedure fixed it.
Edit: I realize its not the same as what's described in the op of that page but it wasn't for me either and that procedure fixed it.

[gcjazz12]

took it out for about a mile or two drive and the odomoter did not record the mileage... any ideas?

[nickelghandi]

Maybe a busted speed sensor or something. All 4 wheels have one. Its something you'll have to get checked.

[gcjazz12]

No DIY?

Also just realized speedometer needle not moving either -

[nickelghandi]

Definitely sounds like a bad speed sensor on one or more sides. Get it checked out. Have you tried disconnecting the battery and then reconnecting it after 5 or so minutes to see if it fixes anything?
Maybe DIY replacement, but I've never had that particular issue, and diagnosis at any honest repair shop should be free.

[gcjazz12]

Took it in to Nissan today and Consult couldn't connect to ABS module ... After inspection found a loose ground wire, reconnected and that solved the problem. Guess I got lucky this time.

[nickelghandi]

Good deal. Glad to hear you got it sorted out!