gonghao

O olteas01:

gonghao Hallo, When the BCM changed, the keys had to be rewritten? As you rewrite them if needed, I also want to change BCM face lift 2015 (F1FT-). All the best!

Yes, you should do PATS programming for changing BCM.

T tracer:

gonghao Thanks I have connect it same way but it does not work.

I have no idea about the ICM which communicates directly with HS-CAN, maybe it's related to HSCAN and PCM?

p.s. Do you have any new discovery about the ACC buttons?

tracer

Here is the diagram for ICM:

It just uses HS-CAN to work and it looks quite simple. Because there is no EB model for MK3 in China, so I don't have any idea about it.

tracer

I still have no idea about that

I've tried many types SASM(Normal, with LKA, with LKA & Steering Wheel Heating), and two types buttons(ACC w/Lim and ACC without/Lim).

None of the combination works.

tracer

I have a network message chart about the how the ACC work between modules, here it is:


You can see the switches signal first goes to SASM directly, and then SASM transforms the signal to LIN circuit then sent to BCM. Here is the official document about this from PTS:

цитата:

Steering Wheel Switches The cruise control steering wheel mounted switches are momentary contact switches that toggle up and down for the switch state. The switches are an input to the SASM. The switch signals are sent across a dedicated LIN circuit to the BCM, which sends messages on the HS-CAN to the PCM to control the cruise control system.

tracer

Yes, exactly same, but do not work

tracer

But I found the signal on BCM DID is incorrect, there is no data changed on BCM 0x4128 when monitored with IDS or FoCCCus. If the BCM didn't post these signal to HSCAN, the CCM wouldn't work. On the other hand, same PCM, CCM and BCM, but different SASM and steering wheel buttons, in such situation, the buttons work perfectly. I cannot suppose is it related to PCM, on the contrary I do doubt about BCM and SASM.

tracer

I've checked resistance of buttons and they all are same the standard value on PTS. I believe the buttons are all in good conditions.

I'm so confused with this problem nearly half year I try everything I can think, but nothing worked.

arkanoid

I've tried both my original asbuilt or 2015 facelift asbuilt, nothing differernt

tracer

p.s. If I DO NOT change SASM and Steering wheel to 2015 facelift, the buttons work well. Because I need the Steering Wheel heating, I changed the SASM and Steering wheel to 2015 facelift.

tracer

Both MK3 and MK3.5 may not work, but some other MK3.5 work well (1.5 EcoBoost with AT) which I've seen.

tracer

I remembered that the buttons for NORMAL CC without ASL works well, but buttons for ACC without ASL does not work either.

tracer

I have a friend, whose car is original 2015 Facelift but lowest outfit (less PSCM and Manual Transmission), and he meets the same problem when try to add ACC.

tracer

I checked the diagram, the LIN Pin is the same, both connect to BCM (C-3)

tracer

The list looks like almost same with mine.

tracer
arkanoid

SASM connect to BCM with LIN bus, I monitored the DID in BCM (0x4128, using FoCCCus or IDS), and I found that the BCM cannot get the signal with those two buttons' click. So I don't know is it a problem of SASM or BCM.

I also changed the 2015 IPC

A arkanoid:

What car do you have and which parts did you exactly change?

My car is Focus MKIII(2012). I've changed lots of parts:
ACC from 2015 Facelift (F1FT-)
BCM from 2015 Facelift (F1FT-)
SASM from 2015 Facelift (F1FT-)
Steering wheel and buttons from 2015 Facelift (ACC + Lim)

In IDS, no error. ACC also works well except two buttons invalid(RES/+ and LIM).

Thanks.

Серый

Hi, Have you met the problem that the LIM and RES + buttons DO NOT work, but others work well? All related ACC parts are from 2015 Facelift.

Thanks.

T tracer:

I have MY 2014 FF mk3. I have installed: BCM from FaceLift 2015 IPC from FaceLift 2015 SASM from FaceLift 2015 Park Assist 2.0 Face Lift 2015 Sync2 Face Lift 2015 Steering Wheel from Face Lift 2015 I have an issue that RES button from Cruise Control does not work. Your car is MY 2015 ? The radar You installed is Face Lift and Face Lift car ?

Hi tracer,

I met the same problems with you. All related parts are from 2015 facelift, but the RES/+ and LIM on/off buttons DO NOT work, but others work well. I cannot set the speed for ACC with RES + button, but - button.

Have you solved this problem?

Thanks.