2005 S60R Cruise troubleshooting, Clutch Switch?

dczech · Post by **dczech** » 27 Sep 2018, 18:52

Hi Guys,

My s60r seems to have a weird glitch that I would like to fix or workaround.

The Cruise Control won't engage. LOTS of things can cause this, but I think I've narrowed it down to my AUTOMATIC car for some reason thinking that the clutch is engaged. (or disengaged? Whichever tells the cruise control to disengage)

I suppose someone may have at some point swapped out the ECU with one from a manual Trans car and forgotten to do the rest of the swap for me !!!

Anyway, Can someone point out on a diagram exactly where I can go and which wires to connect or disconnect to eliminate this false reading. (basically I want to tell the ECU that the clutch is in the proper position to allow Cruise Control)

Please help if you can, I've got a 3500 mile road trip coming up and it would/will be tougher without cruise control!

Thank You!!!

Post by **abscate** » 28 Sep 2018, 03:46

The clutch switch on a manual goes direct to the ECM, but there are many other things that can inhibit Cruise.

Look at your date codes on your ECM before you mess with it, swapping it is a huge mcGilla on a P2 so I doubt that was done.

I’ll dig up my 2005 clutch pindiagram but I bet that’s an empty pin on your car

On my 2005 V70T5m, the clutch switch bridges pins B4 and B15 ( temp sensor in left door mirror ground) to give input to the ECM

Post by **abscate** » 28 Sep 2018, 08:19

Does the cruise light come on in the dash when you push the 0/1 button?

Changed title for search

dczech · Post by **dczech** » 28 Sep 2018, 08:34

Thanks for the help @abscate.

The light in the instrument cluster does come on when I press the on/off button, but I just get no engagement when I press the curly arrow or the + or the -. (I have tried the + WAY more often than the rest)

Never had cruise-ability since I bought this thing.

Post by **abscate** » 28 Sep 2018, 08:46

Either the + or - button should set cruise, the Curly cue button won't until a speed is stored in memory (cleared when the engine is turned off)

Info for my 2005 V70 - assumed similar (dangerous assumption(

I would break out the wiring diagram and confirm your +- buttons are working - they give signals through the contact reel 18/4 in the steering wheel, which connects to the steering wheel module (SWM 3/254) which is a CANBUS xmit to ???

dczech · Post by **dczech** » 28 Sep 2018, 08:58

I don't know if I have a GOOD way to test those at the moment. I suppose ohm-meter on the connector from steering wheel to the SAS/clockswitch once I figure the pinout (I guess that is the (18/4 you mentioned?).

Recently replaced the SAS and no change with that swap, so I'm fairly sure that the problem is at least not in the SAS.

Still leaves the switches, and anything else that could tell the ECU to not engage CC (brake position sensor - replaced) and I don't know what else.

I suspect the switches are good, and lean toward the clutch-indication, as VIDA said something about the clutch sensor not working correctly last time I had VIDA working. Unfortunately I can't remember what exactly the code was, and no VIDA right now.

dczech · Post by **dczech** » 28 Sep 2018, 09:19

I haven't tried pulling off those switches, maybe if they are easy to remove, I can test right at the switch instead of at the connector... I'll have to look into that when I get a chance.

dczech · Post by **dczech** » 28 Sep 2018, 09:39

Since it seems VERY easy to do, I'll try pulling the switch covers and just cleaning as suggested here:

https://volvoforums.com/forum/volvo-xc9 ... lem-46329/

Definitely at least worth a try. Hadn't really been considering the possibility of switch failure until @abscate pointed it out as a possibility.