No Surprise - MOT Fail

[mike213735]

Grob,

Good luck with the diagnosis tomorrow mate!

Let us know how it goes!!!

Mike

 

[BIGHVM]

I think I have a spare sensor or two if they're any use to you. The problem I have is the hub itself since three different sensors didn't help my problem.

That would be great mate- thanks, I could do with one- please let me know what you want and give me pp info by pm- Cheers dude!

 

[PHaTGRoB]

Well, the diagnosis feller finally came. After clearing the codes, the remaining DTCs he got out of the ABS and couldn't clear were:

C1230 - Rear Sensor Circuit Failure
B1676 - Battery Voltage Out Of Range

C1230 should be checkable by confirming continuity through the system between the ABS module connector and the sensor.
B1676 may prove more difficult. According to the 1999 Explorer Workshop Manual (worth every penny off Ebay) this is triggered by the vehicle being jump started in the past 2 weeks, which I have not done. The feller couldn't clear this DTC and suggested I disconnect the battery for 24 hours to see if this clears it. According to the manual, on the 1998 model only, if the fault cannot be cleared the module is at fault but this is a 99 model, so am hoping this will not be the case.
Anyone else had these codes?
Anyone have a spare rear sensor for sale?
I'm struggling to spend any time on it at the moment but am hoping to be able to soon.
Experience and advice welcome!
Thanks. GRoB.

PS. One big lesson learnt - for the diagnostic equipment to talk to the ABS system, the module plug must be connected to the module!

 

[PHaTGRoB]

Does anyone know the pin-outs for the ABS module plug? The manual refers to a break-out box which is expensive. All I'm needing to do is check the continuity beteen the plug and the rear sensor and the voltage supply to the module.

 

[kingscoop]

Once again this forum has saved my Explorer. Checked the rear sensor yesterday and it was open circuit. Placed a resistor into the socket to fool the ABS that everything was working and the ABS light switched itself off. Only downside is that a new sensor is £60 from our local Ford dealer.

 

[jcasey007]

Does this help with the Pin-outs for the ABS control box?

so how do I post a picture in a Reply?)

 

[PHaTGRoB]

Jim. Following Si's advice, I set up an account with "Photobucket" and load my pictures onto there. Then I copy the "IMG code" for the picture off that to paste into the posting on here. Long winded but it works.
I've recently bought the '99 Explorer workshop manual from the states off ebay and this is great but I can't find any connector pictures with pin layouts. However, I do have the wire colours for the cables into the switch, so should be able to work it out from those.
Trouble is at the moment that so much else is going on, I'm not able to spend much time on sorting this. Hopefully this will improve very soon so I can get it sorted. GRoB.

 

[PHaTGRoB]

It's looking better by the minute!!
I dismantled the ABS module plug which gave me the pin-outs allowing me to continuity and resistance check the sensor circuits.
Front L and R Sensor circuits were OK with continuity and a resistance nominally 380 - 390 Ohms. This ties in with my previous measurments.
The Rear Sensor circuit had continuity, suggesting that the cabling was fine, but showed an initial resistance of about 10 Mega Ohms which rose slowly until it settled at about 25 Mega Ohms. So there is my problem. Disconnecting the sensor plug and linking across the terminals, the resistance along the cable run was less than 1 Ohm, so the cabling's fine. The check of the sensor was 10 - 25 Mega Ohms.
I checked both sensor and cabling a few times to be sure, so it looks like my earlier measurements were rubbish!
This means a faulty Rear Sensor.
It looks a pain to change when you've no ramps or pit but I'll get one this week and get it fitted. Hopefully then, the problem will be solved and this is one of the MOT failures resolved. GRoB.

For information, the pinouts for the ABS plug are as follows:

 

[PHaTGRoB]

New rear sensor finally bought. Stupid me thought that, no matter how inaccessible the sensor location is on the top of the diff, it would be a case of undoing the one bolt and, with a slight twist, the old sensor would come out. How naive can I be!!

Anyone know how to get the remaining bit of the sensor out???

This bit is beautifully flush with the diff casing and will not budge for love nor money. It's blowing a hoolie out there and the floor's wet, so I've given up again..for now.

Maybe I should flog the thing and save myself the hassle!

I also plugged in the new sensor to see if the light went out but it didn't. The resistance is correct now at about 1750 Ohms. However, the diagnostic man reckoned I'd need the fault codes resetting to get the light out once the new sensor was fitted. Is this correct?

 

[PHaTGRoB]

Finally got the remaining parts of the old sensor out and fitted the new one - £37 from Ford. Light still on and ABS not functioning.
Assuming the sensor is not the problem now, turned my attentio to the DTC B1676 fault code.
I went through the testing procedure in the workshop manual and all it passed all tests with the correct voltages and resistances.

If this is the case, it says to replace the ABS module.

Helppppp. Has anyone else had to do this and, if so, who did you get to do it???

 

[PHaTGRoB]

Reading fuirther through the workshop manual, it states that the module can be unbolted off the hydrualic unit and a new one fitted.

Is it really that simple?
Or is brake fluid going to gush as I take it apart leaving me totally grounded?!!!!

GRoB

 

[chrisquelch]

hi i have one in the shead will see if it comes apart. cheers chris

 

[PHaTGRoB]

Hi Chris. That's a real help. Are these units all the same for UK models? The manual seems to talk of 1998 and 1999 models differently. The part number on my module is:
XL2T 2C219 AC. This ties in with some US modules on Ebay for 99-00 models.
If the one you have has the same number, would you be loking to sell it and, if so, how much would you want?
Cheers.
GRoB

 

[chrisquelch]

hi GRob
there are two different abs units used i think they changed in 1999.
there shouldn't be any fluid escape when removing the module from the pump.
i had a look in the shed the one i still have is for s type jag . the controll modual dose come off the pump but the only place i could find them for sale separately is USA and there expensive. i think the best bet is to buy a second hand one and use just the module not the pump if you can do it in the car with out disconnecting the pipes this will save having to bleed the abs pump as it needs to be connected to ford diagnostics to cycle the abs to get the air out of the lower valve.cheers chris

 

[PHaTGRoB]

Thanks Chris. That's the answer I was hoping for wrt the splitting of the two items. A couple of the ones for sale in the US show just the module seperately but there are also s/hand hydraulic/module units which I could buy and then split myself. I'll try round a few places for a s/hand unit in the UK first. There's no-one round here able to do anything on the hydraulic unit. Cheers. GRoB

 

[chrisquelch]

hi GRob
hasn't Justin got a complete unit.
there is more info about the abs system on the ford explorer CD manual there copies of the ford tech manual

 

[PHaTGRoB]

I've tried emailing and phoning Justin without making contact. I've now tried contacting him via his ebay adverts.

 

[PHaTGRoB]

At long last the ABS is back up and running. It's great when things come out good in the end. After much searching, Duncan had a 2nd hand ABS Module with the same part number, so I bought that and fitted it today.
I like the way the repair manual says to (just) unbolt the hydraulic unit off it's bracket move the unit away from the inner wing and then unbolt the module off the hydraulic unit. If only it were that easy. The aircon pipe prevents it moving far enough and fat hands prevent easy access down to the small screws at the bottom of the module. Anyway, it's done and working fine now - the light comes on and goes off as it should. As the wipers are also working at the moment, I have booked the re-MOT for Monday.

However, I've switched the self levelling system back on and the light won't go out! Maybe I disturbed something when I was sorting the rear ABS sensor. Nothing's easy!!

Thanks to all who helped me with the ABS. GRoB.

 

[PHaTGRoB]

I must have knocked the plug off the back of the ARC switch when getting the jack out. Sorted.
MOT, here I come....whilst carefully managing my expectations! GRoB.

 

[JB-1956]

Good luck for Monday mate, I love to hear of everything coming together and working out.