ABS Amber Light On - JeepForum.com
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post #1 of 17 Old 09-21-2021, 10:45 AM Thread Starter
doityourselfMM
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ABS Amber Light On

Greetings,

2004 Special Edition 4.0

The Amber ABS cluster light is ON. When I scanned for ABS trouble codes with my Invicta, it listed 2 errors: 1)Impact Sensor #2, and, 2)Left Rear Wheel Sensor Signal lost. I managed to clear the codes with the scan tool, but at 5 mph, they returned.

I am trying to figure out what they have in common ..... ABS Module? What to trouble-shoot next? ANY HELP is needed and appreciated before I take it to the Stealership.

Thanks Guys,
MMIL

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post #2 of 17 Old 09-21-2021, 12:56 PM Thread Starter
doityourselfMM
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Let me make some maybe pertinent specific corrections. The Scan tool is an INNOVA 3160 w/ ABS-SRS.

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

Sorry I wasn't more specific in the first post. As you may imagine, I'm in ah-crap mode. I can erase the codes and the ABS light goes off. Between 5-10 mph it turns on again. The ignition dance X3 shows only donE.

I'm pretty religious about looking at the cluster when I start the car. I saw nothing prior to this morning, and odd, that 2 faults showed up. I guess it's possible that the ABS light was on and I never noticed it until today. Now, could this next thought be relevant. This morning, I did something I never routinely do. The car was sitting in the driveway on a slight slope. Instead of starting it and letting it drift forward, I turned the ignition key to 'Run' (not start), put the trans in 'N' and let it drift forward. With the engine not running, there were no power brakes. When I did put on the brakes, I was amazed at just how hard and far down the pedal need to go. I see no correlation between that braking maneuver and the 2 faults the Scan Tool provided. I'm just sharing everything, as I might be missing something.

ABS specialists welcome!!!

Thanks,
MMIL
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post #3 of 17 Old 09-21-2021, 01:12 PM
HampshireWJ
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Seems to be that you have a sensor gone down. Does the Innova give you live data? I have a Launch scanner and in ABS Mode you can set it to live mode, drive and it will show wheel speeds for each wheel. Very simple to see what the sensor is sending - obviously if it is not giving a speed reading the sensor needs replacing. Think I've replaced three over the past five years, pretty simple. The connection for the left hand rear is under the rear seat on left hand side.
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post #4 of 17 Old 09-21-2021, 01:22 PM Thread Starter
doityourselfMM
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Appreciate the reply! Yup, I already checked the plug under the seat and left the carpet up. I'll pick up one tomorrow AM and HOPE that the code disappears. That's the easy one! This stupid Crash Zone Sensor has me baffled??? Would a Crash Zone Detector (which I thought communicated with the Airbag Module) pop up an ABS code?

Unfortunately, my tool only does engine live data.

MM
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post #5 of 17 Old 09-21-2021, 01:38 PM
HampshireWJ
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As far as I can make out the Crash Zone Detector would be a body related code and have a 'B' prefix, and the ABS would have a chassis or 'C' prefix to the code - so the two are not related. What actual codes, both letters and numbers are you getting? I am by no means an expert on the codes, but I think the crash zone detector code will flag an 'Airbag' warning.

This may help - https://www.obd-codes.com/trouble_codes/

I am sure if you put up the actual codes you have someone will be able to give advice.
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post #6 of 17 Old 09-21-2021, 01:50 PM
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I changed my passenger rear ABS sensor yesterday...fixed the ABS light issue I had.

I also saw this on the web: Safety Recall R06 / NHTSA 15V-046 Occupant Restraint Control Module
Appears to be applicable to the 2002-2004 Jeep WJ (Dec 2015).
Not sure this has anything to do with your issue....just thought I'd throw it out there.

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post #7 of 17 Old 09-21-2021, 01:59 PM Thread Starter
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Hi JT,

Where was the passenger rear sensor located? Right rear door? I'm not sure my Jeep has the side sensors? My scan tool only says "Crash Zone Sensor" so it's not as sophisticated as I wish it was. And sensors are too expensive to just "shotgun".

I was wondering about the recall too, which I have never done. The guys at my local dealer are clutzes. The indy shop where I go they are great, but cannot do the 'recall' work.

And to follow-up on 'Hampshires' question, my tool shows NO B, C, or P codes. There is only an '06' above the two issues listed above.

MM
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post #8 of 17 Old 09-21-2021, 02:10 PM
jtpeters
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The passenger side sensor connector is under the passenger back seat...under the carpet just right of center (looking towards the front of the vehicle).
There is a small carpet cutout that, if you're lucky, you can just lift it up and view the connector.
In my case, not so lucky...had to pull the rear seat/amp/seat belt, etc. to get enough room/slack to work under the carpet.
Not too bad though.

The driver's side sensor connector (this is your indicator - Left Rear Wheel Speed/ Signal Failure) is under the driver's side rear seat/under carpet.

As for the Crash Sensor...I wouldn't hesitate to have the dealer perform the Recall if it is applicable and has not been done.

2004 Jeep Overland WJ 4.7 H.O. (Bought new in Oct 2003)
2014 Jeep Overland WK2 5.7 Hemi (Bought used in 2016 w/7k miles)
1970 Ford Mustang Boss 302 (in Family since 1974)
2013 Ford Mustang Boss 302
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post #9 of 17 Old 09-21-2021, 02:18 PM Thread Starter
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Point well taken on the recall.

Back to my ABS light, odd that the Crash Zone Sensor error is showing up under ABS, and it has me baffled. If it had to do with the Airbags/system then I would show an SRS code on my scan tool. There are none there. Only under ABS.
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post #10 of 17 Old 09-21-2021, 02:56 PM
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"Crash Zone Sensor " is not ringing a bell -

I would start on the wheel sensor code - get it out of the way and then rescan. maybe soon someone will have Crash Zone Sensor info.

When I see the price of OEM I think aftermarket.
When I see the quality of aftermarket I think OEM.
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post #11 of 17 Old 09-21-2021, 02:58 PM Thread Starter
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Quote:
Originally Posted by jtec View Post
"Crash Zone Sensor " is not ringing a bell -

I would start on the wheel sensor code - get it out of the way and then rescan. maybe soon someone will have Crash Zone Sensor info.
Yup, an inexpensive part and easy to install. Then I'll rescan. BTW - do you know what ABS Code 06 means?

Thank You!
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post #12 of 17 Old 09-21-2021, 09:39 PM
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Ok not sure about the crash zone sensor. However before you go replacing parts have you pulled the wheel sensor and made sure it was clean? I had an abs sensor issue with mine. When I pulled the brakes to replace I noticed that the axle seal was toast and had caused a ton of road grime in the sensor and ring. I cleaned it up and it solved the issue
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post #13 of 17 Old 09-22-2021, 03:29 AM Thread Starter
doityourselfMM
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Yessir I did just that yesterday. Sprayed it with DeoxIt. Appreciate the tip.


Quote:
Originally Posted by Soem0 View Post
Ok not sure about the crash zone sensor. However before you go replacing parts have you pulled the wheel sensor and made sure it was clean? I had an abs sensor issue with mine. When I pulled the brakes to replace I noticed that the axle seal was toast and had caused a ton of road grime in the sensor and ring. I cleaned it up and it solved the issue
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post #14 of 17 Old 09-22-2021, 06:17 AM
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Duff earth on the warning lights perchance.
The only possible common circuit I can think of.
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post #15 of 17 Old 09-22-2021, 06:30 AM Thread Starter
doityourselfMM
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Quote:
Originally Posted by Delta0 View Post
Duff earth on the warning lights perchance.
The only possible common circuit I can think of.
Help me out here. It's early and my brain is still waking up. Can you further explain what you mean? "Duff earth"?

MM
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