L322 td6 no comm with abs module

P38dse1998 · Feb 22, 2022

2003 l322 td6

Replaced abs module 4 times now and still not found by any of my diagnostics.

I have a foxwell, bmw scanner 1.4 and inpa.

All other modules communicate.

I have checked cable harness for live and earth's and seem to good.

Soooo I am at a loss.

I also have a a can bus fault.

I also have an android touch screen retro fitted in replacement of original stereo.

Can someone point me in a direction?

Datatek · Feb 22, 2022

I expect the CAN BUS fault is the reason for the lack of comms to the ABS module. Maybe the Android retrofit has messed with something.

tomcat59alan · Feb 22, 2022

I know nothing about electrickery,I can only suggest kneeling in the Easterly direction.

P38dse1998 · Feb 22, 2022

Yeah I'm thinking the android unit may have done something.
I hear issues regarding the lcm. I have disconnected both headlights to see if I can communicate with abs. But still cannot.
I have diagrams of all the buses.

The canbus error is logged in suspension and bcm.

Would a canbus on say a speed sensor cause diagnostic to not communicate?

As far as I am aware, canbus is seperate to the diagnostics line.
Some setup this like. Headache

backinblack · Feb 22, 2022

Just tried my Foxwell and it does talk to the ABS so I'd agree with others about the canbus error stopping comms.

P38dse1998 · Feb 22, 2022

These are the diagrams

P38dse1998 · Feb 22, 2022

P38dse1998 said:
These are the diagrams

As can be seen, abs module communicates via canbus to sensors etc and to instrument cluster. Now I have abs warnings on dash, would this suggest abs module IS communicating on the canbus?
I see the diagnostic socket is connected to abs module via ds2 bus.

I think I have a canbus error on the canbus and I have an issues with the ds2 line from socket to abs module. Seperate issues.

I should still be able to communicate with abs module via ds2 network, which then should show faults on the abs. Including a canbus fault.

Ie as can be seen communicating with suspension module via ds2 network, login, scan suspension module, error shows canbus fault.

But abs module not found so I cannot check for errors, code nothing.

P38dse1998 · Feb 24, 2022

SOLVED!!!!!

After checking headlight level ecu, and found none present, I then went onto check ds2 line and to fit a seperate wire from obd socket direct to ds2 pin on abs module.
When stripping wire, it broke at abs connector. Scraped out all the green corrosion and found a wire. Dropped in some solder, then soldered a new section of wire in.

All lights off. Calibrated steering angle sensor.

Jobs a good un.

FYI ds2 line is white with purple stripe.

4 abs modules later........

L322 td6 no comm with abs module

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