Can-bus guru's advice needed please. Topic is solved

AKellner · Post by **AKellner** » 14 Aug 2020, 11:00

I appreciate the advice. I've actually tried this more than once. The only place I found any sign of corrosion or buildup was on a main harness plug directly to the left of the CEM above the kickpanel. I cleaned it the best i could but not sure how to clean the plug that the pins go into. I didnt want to bend anything and ruin the harness.

RazieL · Post by **RazieL** » 14 Aug 2020, 11:48

yeah, i get it. sorry i cant be of more help, im by no means an expert, just having some issues myself and spent a lot of time on google and forums

good luck tho

AKellner · Post by **AKellner** » 14 Aug 2020, 12:51

Thank you, I hope you get your issue solved. This thread is marked as solved, did i miss the solution?

RazieL · Post by **RazieL** » 14 Aug 2020, 14:35

i msg-ed the OP a while back and got this response:

"Hello Raziel

So far so good! I’m not 100% trusting it yet but after fitting the 3rd CEM (repaired ones not new) it seems ok. I’ve started using a Volvo mechanic who said the connectors for the TCM and ECM were in poor state, so we’ve cleaned them.

I hope the S40 is a simple (cheap) fix.

Matt"

AKellner · Post by **AKellner** » 15 Aug 2020, 12:08

Hey, smart thinking. So it was the CEM or ECM TCM plugs? Could a short in the wheel speed/abs sensor wreak all this havoc?

forumoto · Post by **forumoto** » 12 Sep 2020, 22:55

Wish I am close to any of this fault cars to take the fight on... I love probing Volvo cars as electrician

AKellner · Post by **AKellner** » 20 Sep 2020, 01:08

I've done all you suggested, no joy. I did finally get a DICE scanner hooked up to it appears I have a short in the wiring or a bad module. Really getting irritated with this thing...

greentrout · Post by **greentrout** » 25 Dec 2020, 22:34

I have all the above issues with my car, RHD 2006 D5 XC70, plus when I try to start the car there is a physical click/tapping at the gear shifter. I initially thought the sound was coming from the area the brake module is in, but if ypu leave a hand on the gear shifter you can actually feel the tapping when ignition is turned to 2 and the car is going through it's diagnostics.

Rtea · Post by **Rtea** » 17 Oct 2025, 00:38

Hello all,

Has anyone solved the issues?
I have similar ones. Tapping sound comes from sifter lever locking pin (you are not able to shift out of P until you press on a brake pedal). It's prob. caused by TCM ecu not being able to communicate on the can network. I.E. can issue.

Can-bus guru's advice needed please. Topic is solved

Re: Can-bus guru's advice needed please.