ABS Amber Light On

MMIL

MEMBER
2004 JEEP GRAND CHEROKEE
4.0L
6 CYL
4WD
AUTOMATIC
80,000 MILES

This morning the Amber ABS light came on. I checked with my INNOVA 3160 w/ ABS-SRS.

The actual codes read:
06
1) Crash Zone Sensor
2) Left Rear Wheel Speed/ Signal Failure

First, my scan tool is limited. By Crash Zone Sensor could it be referring to one of the front L+R (bumper) frame sensors? If so, aren't they part of the SRS system? I have no SRS codes. I cleaned and reseated all the pertinent connectors. With my scan tool, I can clear the codes, but between 5-10 MPH, the ABS light comes on again. My tool doesn't show B, P, or C codes. Turning the ignition key on/off 3 times shows no code. Any ideas? And thank you!

3 Replies

KASEKENNY

MECHANIC
18,907 POSTS

I think you are exactly correct. I would not worry about the crash zone sensor issue because that is not going to turn the ABS light on. You have a separate SRS light so if that is not on then I would suspect that this is a scan tool issue.

Here are a number of testing and guides that will help with wheel speed sensor issues:

https://www.2carpros.com/articles/abs-wheel-speed-sensor-test

https://www.2carpros.com/articles/how-to-replace-an-abs-wheel-speed-sensor

https://youtu.be/rTtAnsOlZU4

I am also attaching the info below from the manual on how to test and replace the wheel speed sensor if this proves out. This testing is for this failure but I suspect the sensor or hub is the issue since you have to be moving before the light comes on.

Please run through this and let us know what you find. Thanks

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Tuesday, September 21st, 2021 AT 3:41 PM

MMIL

MEMBER
2 POSTS

Did you ever work under a vehicle when it was pouring rain, and were drenched from the waist to the toes? I’m sure you have. The $50.00 wheel sensor fixed both codes. That crash zone code was bull****, some type of ghost code error and obviously what you get with an improper scan tool. At least my OBD II could erase the codes once corrected.

Test drive with no ABS light. Thanks much for your suggestions and tips. Time now for some dry clothes!

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Wednesday, September 22nd, 2021 AT 9:04 AM

KASEKENNY

MECHANIC
18,907 POSTS

Haha. I have not worked in the rain but snow, yes. It is not to smart to pull a car into a heated shop cover in snow and then lay underneath it. The snow/ice slowly melts and then drops on your lower half with no warning. Needless to say, it was like a magnet directly to where you don't want it to drop.

Thanks for the update and I think you are correct. More than likely there was an issue and the scan tool did not interpret it correctly and displayed it as those crash sensor issues.

Clearly if it is not there then we are all set. Thanks for coming back and updating us and sharing your experience. Others will surely benefit from it in the future.

Thanks for using 2CarPros.

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Wednesday, September 22nd, 2021 AT 11:31 AM