I am chasing an ABS fault on my 01 XJR. I have a WDS with the Jaguar software installed. If I have to change out my ABS logic module, I might have to use the WDS to have it accepted on the CAN.


I know how to get to that function on the WDS but have never performed it. I don't want to screw up and make my XJR a brick.


Can someone give me general instruction on how to use the WDS to have the XJR accept a replacement ABS module?


Thanks.

 

I can't help with the WDS, but I replaced the module in my XK8 with a matching number unit and had no problems. Even if it gives a 'wrong part fitted' message it may clear while driving.

 

The only time you need to configure an ABS module is if it is NEW or really old and has lost the config memory.

If you repair your original module you won't need to do this.

If you get a replacement module (and there are 5 different ones for the X100/X308 models) be sure it is the EXACT module.

If the INSTPK display says 'WRONG PART FITTED' then go to the WDS vehicle config tab on the top (about 2/3 the way over from the left) and choose configure modules.
Select ABS module and configure as NEW. Follow the on-screen prompts.

I have only had to do this a few times with used modules and ALWAYS with NEW modules.

The X308 2001 models will use the JLM21323 6 pipe WITH traction control (9 Blue valves)

 

Thanks Motorcarman!

The WDS reported a C1155 pointing me to the LF Sensor and circuit.
The sensor checked out at 1150 ohms and just for grins I replaced it with another. The replacement reads the same as do all the other wheel speed sensors on the car. Problem remains.

I plan to replace the cable that connects the LF wheel speed sensor to the ABS wiring harness. The existing cable reads good continuity using a digital volt ohm meter, but since it is most likely 14 years old, replacing it seemed to be a good idea.

The wiring from the ABS Logic Module connector, pins 17 and 18, to the wheel speed sensor connector also checks out good continuity wise also using a digital volt ohm meter. All connectors have been visually inspected and cleaned using an electronic contact spray cleaner. All are bright and shiny.

If replacing the cable connecting the LF wheel sensor with the ABS wiring harness does not correct the problem, then I am looking at buying a remanufactured ABS Logic module from ASI to replace my existing module.

Thanks for your valuable input and I am open to any insight or suggestions that you may have.

 

I have an old module like that. The customer (another repair shop) replaced the wheel speed sensor and link harness but the fault persisted. I sold them a repaired used module and cured the fault.

Sometimes the modules fail other than C1095.

bob gauff

 

I have one that I had to replace due to a C1155 that was internal to the module.

The used one I bought had a C1095 and when I informed the seller he refunded my payment and told me to keep it. I repaired that one myself.

 

Where is the JLM21323 number located? I do have the 9 blue valves with traction control and 6 pipes. A JLM number is not present on the logic module, valve body or the motor. Is it on the PC board?
I am always interested in learning more.

 

Look on the VCATS sticker in the trunk, near the spare tire.

 

Nope. ABS not listed on VCATS.

 

Maybe it's not a JLM, mine is a LJA2210 series. Is there a letter& number combination of some sort on the module?

 

Didn't find a JLM sequence on the module. Maybe it had an Ate part number sticker on it when new and has since weathered and fallen off.

My module is a LNF2210AD, ABS + TRAC.

 

That looks like a good number. Why it's not a JLM series like Bob says is interesting, but at least you have a number to search with.

 

The numbers on the modules themselves are NOT the correct Jaguar numbers. This has been discussed to DEATH in past posts. The parts catalogue numbers do NOT match the numbers printed on the modules.

I did an EXTENSIVE write-up some years ago about the models and years for the 5 different modules from 1997 to 2003 X100/X308.

9 blue solenoids are the JLM21323 Modules (2001 onward). The other 4 modules use black and beige valves. Again, the part numbers are printed on the original shipping box and do not match the actual printed module numbers.

The numbers on the modules might be used to ensure that you are installing the same part as before but cannot be used for JEPC reference.

bob gauff

 

Thanks for the clarification on the part# versus the module number.

Since I have 9 blue solenoids, I am sure that my LNF2210AD is a JLM21323 as you describe.

If replacing the connector between the wheel speed sensor and the ABS wiring harness connector does not correct my C1155, I will send my logic module to ASI to be rebuilt.

Thanks for your help. I will post my results.

 

I replaced the link between the LF wheel speed sensor and the ABS wiring harness. Not the fix.


I sent my ABS Logic Module to ASI to be rebuilt. I have installed the rebuilt module and still have the same problem. Sigh. By the way, the rebuilt module was accepted by the ECM without the dreaded 'Wrong Part Fitted' message.


I am hoping for some Motorman wisdom here.


I have measured the resistance of all four wheel speed sensor circuits from the ABS Module connector. All measure between 1165 and 1173 ohms.


I have done a hard reset. No difference.
I have moved the wheel speed sensor from the LF to the RF. No difference. DTC code is still C1155 (Front left wheel speed sensor input circuit failure)




What to do next?

• Talk to ASI about getting another logic module. It could still be the module.
  • Buy another LNF2210AD module for testing or buy another rebuilt from ASI.
• Replace the link between the RF wheel speed sensor and the ABS wiring harness. Maybe my WDS is not pointing to the correct location of the problem. Not likely, but possible. I would use the WDS for pinpoint testing but do not have the pin cables, so the best I can do is chase the error code.
• Check the resistance from the ABS connector to the wheel speed sensor using an analog volt-ohm meter while shaking the wiring. I have done this previously, but why not repeat the test.
• Put a piece of tape over the instrument cluster message window and ignore it! This is my least favorite option. I do wish I could use the WDS to tell the Instrument Pack to stop telling me about the ABS. Life would be better.

So, I am open to suggestions. Any and all input is appreciated.

 

How many times have you driven the car with the rebuilt module installed?

 

I have driven the car three times since I installed the rebuilt logic module. The first two trips were about 2 miles each. The third trip about 4 miles.


I tried clearing the ABS code, but it wouldn't budge even though I have cleared it a single time previously. This time, the code would not clear using the WDS.

 

There could be a fault with the module itself.
I usually use WDS 'datalogger' to watch the wheel speed sensors while they are rotating.
If the sensor circuit is faulty I substitute a 'known good' abs module (I have DOZENS of used/repaired modules).

The link harness is usually the problem but I have a few faulty modules with the wheel speed sensor fault and mark them as such before throwing them into the 'faulty pile'.

The problem with substituting a used module to the car is that if it needs to be configured and you don't have a proper diagnostic computer to do so, then you are no better off then you were before.

If you can get one for CHEAP from a salvage yard, then you don't need to install it on the hydraulic unit, you just need to wedge it down behind the left headlamp assy and connect it electrically (both the multipin harness and the pump motor, it WILL REACH). If the fault is GONE then install it properly and go on with your life.

It might not require configuration and if it is cheap then you are done.

ALL later XJ8/XK8 modules with the 9 blue solenoids (JLM21323) will work on your car.

bob gauff

 

Not trying to put you on the spot, but would you have a known good LNF2210AD you would be willing to sell or rent to me? A known good module would definitely help with the diagnosis.

 

Today, I printed out the Pinpoint Tests for the ABS system available in the factory shop manual.

• All fuses involved with the ABS were checked and are good.
• All resistances from the LF27 ABS connector to the Right and Left front wheel wiring are well below the max allowed (5 ohms max. I read 1.5 ohms).
• Also, using an analog meter set to AC voltage, I was able to see voltage being generated at the wheel speed sensors and at the appropriate pins at the LF27 ABS connector when the front wheels were rotated.

So, I think it is safe to say that the wheel speed sensors are good and the wiring is good for the front. My DTC, C1155, points to the Left Front, but I thought I would check the Right Front as well.


That leaves the ABS logic module. Although it was just rebuilt by ASI, there still seems to be a problem.


I will talk with them tomorrow about possibly swapping it out for another.