[dmilli0501]

This by far is an amazing write up for a situation where it is a guess as to what sensor is bad, especially if you are unable to get a code! These WSS' are anything but cheap $$, so this is a great troubleshooting guide to drill down the issue. Thumbs up to @Primer

 

[Primer]

This by far is an amazing write up for a situation where it is a guess as to what sensor is bad, especially if you are unable to get a code! These WSS' are anything but cheap $$, so this is a great troubleshooting guide to drill down the issue. Thumbs up to @Primer

Thanks man!! I know not the coolest write up but hey if it helps someone I’m happy. Yeah those sensors are ridiculously priced, especially the rears for $200 a piece last time I checked.

 

[MSU Titan]

Thank you

Wonderful, helpful post. Thank you!
I just wanted to do a slight update on the colors. My Titan 2004 was slightly different on the colors but this post pointed me in the correct direction and was able to fix my issue at no cost.

Driver Front- Brown/white & Green/brown
Driver Rear - Pink & Blue
Pass Front - Black/Red & Brown
Pass Rear - Purple/White & Green/Yellow

Wires between the ABS sensor and wiring harness had melted due to a bad exhaust back near the passenger rear sensor and just eventually broke one of the 2 wires going to the ABS sensor. I had to eliminate the connectors but worked just fine. Had to drive it a short distance to have the lights go off but after that no issues. 4x4 engaged no problem.

Highly recommend this method for testing and locating the correct sensor. After getting 3 positive responses when testing with the multimeter I knew right where to look and sure enough saw the broken/melted wire. Probably would not have seen it upon a simple visual inspection. Looked fine until I got right in there and started pulling back the shielding.

 

[lukemckn]

So I followed the procedure but I got no resistance (open circuit) value from all 4 sensors. Could this indicated something else is wrong? My multimeter was working but I could not get a single measurement from any of the combinations posted here. Anyone have any ideas?

 

[jsexton]

So I followed the procedure but I got no resistance (open circuit) value from all 4 sensors. Could this indicated something else is wrong? My multimeter was working but I could not get a single measurement from any of the combinations posted here. Anyone have any ideas?

flip flop your leads. they are directional. it will be open if you have them backwards.

 

[lukemckn]

flip flop your leads. they are directional. it will be open if you have them backwards.

Yeah I tried this on all of the pins. Couldnt get a single resistance value out of any of them with leads in either position. Are there any other checks I can do?

 

[lukemckn]

If I go in and unplug the ABS sensor from the wheel side can I check that with a multimeter? Should I expect to see resistance in the same ranges? Much more of a PITA to go around and unplug them all just to check but I dont know how else to go about it

 

[jsexton]

Yep


..

 

[lukemckn]

Can anyone confirm the resistance values I should be seeing? OP said 800-1400 OHMS but them commenters are saying they are seeing 8-14 M ohms (8000000 - 14000000 Ohms)

My Multimeter only goes up to 2000K Ohms (Like this)

Can anyone that has done this test confirm what readings youre getting?

 

[lukemckn]

So I followed the procedure but I got no resistance (open circuit) value from all 4 sensors. Could this indicated something else is wrong? My multimeter was working but I could not get a single measurement from any of the combinations posted here. Anyone have any ideas?

Okay in case anyone else runs into this problem: the resistances you are looking for are ~10 M ohms (mega ohm = 1000000 ohms). My first multi meter could not go up that high so I borrowed a friends. Sure enough 3/4 gave me resistances ~10M ohm and one gave me nothing (Open circuit infinite resistance). The sensors did seem to be polarity dependent though as I could get resistances in only 1 orientation of the prongs.

I unplugged the sensor that wasnt reading (front passenger side) and checked the sensor itself. Nothing. I also confirmed connectivity back to the plug to make sure the wire harness was OK and both the white and the black wire were were good. Ordered a new sensor and hoping to put it in tonight! Fingers crossed that the problem will be fixed!

 

[Gnagle]

Great write up

I have a 2005 Frontier SE (6spd, 4x4) and came across this helpful article.
First wanted to say thanks to everyone contributing and because its still relatively active, I thought I'd share my experience

I bought the truck on Craigslist and the ABS & SLIP lights came on just once in a while. I checked out the sensors and found a very poor DIY job from someone previous on the passenger front wheel: Wire nuts, electrical tape, bypassed the connector with some jumper wires. Yuck. I figured I would re-do it right.

I replaced the sensor with a $16 sensor on amazon instead of the $55 part from NAPA.

Now the light is on ALL the time instead of just intermittently. 4x4 will not engage and neither will cruise control; I reckon because the car thinks its slipping.

Then I found this article. Awesome.

3 of my 4 abs sensors are reading around 34.5 Mohms (I think my number is so different because it is a 6 spd. The sensors are different depending on the transmission)
The one I replaced is reading .465 Mohms... I figure I will try to return it because it doesnt meet spec. Now I will be looking at Rock auto or NAPA for the real part.

 

[bh06]

Just thought I'd add here what my readings were in case it helps anyone who is also troubleshooting their ABS sensors. These active sensors are difficult to test because their impedance varies depending on the input voltage. However, I was able to successfully test with my multimeter in resistance mode. I found 3 sensors with 18-19 MOhm resistances and the remaining sensor with a 1.4 kOhm resistance. As specified, if my lead polarity was incorrect I saw open circuit for all sensors. Replaced the outlier and everything worked.

 

[scottgas]

I am now having issues with the 3 warning lights in question. 2007, 2wd SE, 225,000 miles. Lights came on yesterday. I checked all fuses and are all ok. Battery cables tight, gas cap tight, grounds tight. Truck starts and runs fine. I disconnected both battery cables and held them together for about a minute then reconnected. Started truck and lights still on. Left the house and by the time I was leaving neighborhood the lights went off. Last night we left the house and lights came on again. Drove bout 100 miles and still on, truck runs fine. Trying to test resistance at the ABS module plug but only getting any kind of reading at the driver front, red/dark green wires. Only seeing about 190ohm. Not getting any reading at any other pair of wires. I have seen here where this isn't best way to test but starting with this. Any thoughts?

 

[scottgas]

Forgot to mention, the front right wheel bearing/hub was changed at 92,000 miles. The driver front was changed at about 220,000 miles so both front sensors have been changed at some point. Not ruling out that it still could be 1 of them.

 

[eighty]

Hey folks, I'm having a heck of a time getting the abs plug out. I managed to take the cover off by pushing in where the arrow is, but what do I pull on to get the whole plug out? Is there another lock I have to pull/push on? Help!

 

[GringoRubio]

Hey folks, I'm having a heck of a time getting the abs plug out. I managed to take the cover off by pushing in where the arrow is, but what do I pull on to get the whole plug out? Is there another lock I have to pull/push on? Help!

View attachment 139947

For goodness sake, pull yourself together, man!
Actually, I meant put the plug back together.
What you have detached is the cover for the plug. Put the bottom tabs of the cover back in, then carefully pop the top tab back in.
Now, to remove the plug- there's a lever on the back of the cover. The hinge is the circular bit in the middle on each side. Follow the lever to the bottom back side (facing you). To rotate the lever upwards, you may need to press on a tab that locks it in place. Keep rotating the lever upwards until it locks in place at the top (or close). Then, pull the whole plug toward the front of the truck. Try not to pull the wires, but jiggle the plug in all directions while steadily pulling the plug.
That should do it!

 

[eighty]

For goodness sake, pull yourself together, man!
Actually, I meant put the plug back together.
What you have detached is the cover for the plug. Put the bottom tabs of the cover back in, then carefully pop the top tab back in.
Now, to remove the plug- there's a lever on the back of the cover. The hinge is the circular bit in the middle on each side. Follow the lever to the bottom back side (facing you). To rotate the lever upwards, you may need to press on a tab that locks it in place. Keep rotating the lever upwards until it locks in place at the top (or close). Then, pull the whole plug toward the front of the truck. Try not to pull the wires, but jiggle the plug in all directions while steadily pulling the plug.
That should do it!

Ahh much appreciated. The locking tab is on the bottom then you pull on the lever to ratchet the plug out.

Any tips on getting it back in? I can’t seem to get the ratcheting lever to lock.


Sent from my iPhone using Tapatalk

 

[GringoRubio]

Ahh much appreciated. The locking tab is on the bottom then you pull on the lever to ratchet the plug out.

Any tips on getting it back in? I can’t seem to get the ratcheting lever to lock.


Sent from my iPhone using Tapatalk

Make sure the lever is all the way up before you push the plug in. Sometimes it will lock on the top tab, sometimes it won't. Give the plug some pressure, but let the lever do all the work...
Also, since you had the cover off, you may have skipped some teeth on the gear. You may need to carefully remove the cover again, use a screwdriver on the teeth to make sure the locking bars (my term) are fully lowered, make sure the lever is fully raised, and then re- clip the cover.

 

[eighty]

Make sure the lever is all the way up before you push the plug in. Sometimes it will lock on the top tab, sometimes it won't. Give the plug some pressure, but let the lever do all the work...
Also, since you had the cover off, you may have skipped some teeth on the gear. You may need to carefully remove the cover again, use a screwdriver on the teeth to make sure the locking bars (my term) are fully lowered, make sure the lever is fully raised, and then re- clip the cover.

You got it, I didn’t sit the lever properly. Once I reset it, it locked in place easy. Much appreciated. These plastic connectors always give me trouble!


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[K.hurrle]

Forgive the necro post but I have a question on this one. Ive tested my 05 4wd and Im getting get readings that are in the 22.00 neighborhood and two that are in the 15.00 neighborhood. However, on my 09 4wd I get the two 15.00 readings, one 22.00 reading and one 32.00 reading. The high reading is for the front passenger side and Im just wondering what a high reading means.

Thanks!