Resolving SilentKey Error on Ford S-Max DCM3.5 with Foxflash

Problem: It’s a Ford S-Max with Delphi DCM35 ECU. MPPS, KESS and Foxflash all read ID. But they all have problem reading flash. Kess showing wrong security code. Foxflash showing error SilentKey. The car has before made stage1 by someone else its possible he protected it from reading now or its obd impossible this ECU? I’ve read several 3.5 DCM readings in various Ford MPPS and KESS Fox models and never had a problem. What causes the silent key error?

Possible reason and solution:

1). Ecu has been locked by a previous tuner. Load an original file and start from there.

2). Doing PCM update with Forscan beta or IDS. After that it will be ok.

3). I had the same problem. Write it with Autotuner, but failed, so i recovered it with MPPS, but with an other tool the security code changes automatically on OBD and Bench. So must go for BDM. It is blocked because it is writen with an other tool via OBD, you need the same tool which Stage1 was done or BDM it.

4). Try to use clone PCMflash, I once encountered the same problem in FLEX and Dimsport, which was solved after using PCM.

How to Choose the Right Power Supply for Foxflash

POWERSUPPLY INFO!
Since this is asked quite a lot frequently when it comes with foxflash programmer so the post here is about this power supply issue.

Why?
Instability or undervoltage can cause programming interruptions, corrupted reads/writes, or worse — bricking the ecu (so dont underestimate this, you dont want extrabricked ecus because of your not providing good voltage and amps ).

remember that undervoltage is the main reason why you will fail on some ecus, not the tool itself. undervoltage can be fatal in some cases and that ecu is not anymore recoverable.
ALSO keep in mind that overpowering ecu is just as bad as undervoltage. you will end up killing the ecu , so play in area that is considered safe 12v-14.5v say tops.

WHAT YOU ACTUALLY NEED FOR BENCH ECU WORK?
So when doing bench programming of ECUs like MD1, the ECU needs a stable automotive-like 12 V DC supply. It usually won’t get enough or stable power from a simple USB (no way) adapter — you want a laboratory-grade or automotive bench power supply with ADJUSTABLE output and enough current (amps) capability.

Most professional bench setups use good quality regulated DC supply set around 12–14.5 V (we emulate healthy engine on idle or good battery+alternator combo) and enough amps to have some headroom when ecu powerside "spikes" during reads/writes.

Say a Typical automotive ECUs consume in the range of about 500 mA to 2 A within during normal operation.
Remember that certain ecus internal operations (e.g., CAN transceivers, bench communication hardware, boot loader initialization) can cause current spikes, so ensure enough headroom on your currentside (amps).

So What kind of power supply to go for, too many options?
Laboratory grade fully adjustable and regulated & controlled even source of voltage & amps.

Stability & Protection
Prefer regulated supplies with short-circuit protection, current limiting, and low ripple (important).
Linear power supplies provide cleaner power, but quality switched-mode supplies (bench lab units) can work well if stable and good quality.
adjustable in range of say 0–30volts and 5+ amps is needed (prefer 10A so you have some headroom in your settings). So when doing older ecus you can safely set TOPRANGE in current to 5A, on newer ecus i would say 8A topend, remember its just the ecu were powering here NOT the entire car.

POLARITY MATTERS!!
do NOT connect power source + and — wrong way, you will end up murdering your ecu. So start with checking polarity first and then the datalines can high low, kline (on older) and gpt (emulated cranckshaft signal. with all the rest you can play around in (meaning datalines) BUT dont mess around with powerside, thats considered a BAD idea.

I got my bench power supply now, where to aim?
Set Voltage First: Adjust your supply to ~13.5 V DC before connecting to the ECU.
Current Limit: Start with a safe limit (e.g., 5 A), and only raise if your bench setup (cables, adapters) demands more NOT BEFORE!!
Stable Wiring: Use a quality bench harness or distribution box so the ECU sees steady power.
Monitor: If your supply has a display, watch for sudden voltage dips during programming — those can interrupt flash reads/writes. so eyeball displays during write/read, if it needs more you can see that.

Whatkind of power/current range used on what ecus?
EDC15
Idle / powered 0.15–0.40 A
Read 0.25–0.60 A
Write / flash 0.40–0.90 A
Short peaks/spikes ~1.0–1.5 A
 — 
EDC16
Power-up / idle 0.4–0.7 A
Read (OTB or bench) 0.6–1.0 A
Write / flash 0.9–1.8 A
Short peaks/spikes ~2.0–2.5 A
 — 
EDC17
Power-up / idle 0.6–1.0 A
Read (bench / boot) 0.8–1.3 A
Write / flash 1.2–2.5 A
Short peaks ~3.0 , A sometimes 3.5A
 — 
MED17
Power-up / idle 0.5–0.9 A
Read (OTB / bench) 0.7–1.2 A
Write / flash 1.0–2.2 A
Short peaks/spiking ~2.5–3.0 A
 — 
MD1/MG1
Operating StateTypical Current
Power-up / Idle 0.3–0.6 A
Read (bench) 0.6–1.0 A
Write / Flash 0.8–1.5 A
Short Peaks Up to ~2.0 A
NOTE! These ecus spike a lot during read/writecycles.

Credit to STG file tuning.

Foxflash MD1CS003 Peugeot 508 AdBlue Write Guide

Problem: Peugeot 508 1.5 Blue hdi 96 kw with MD1CS003 ECU.
Performing adblue in progress need info:
Allready have benched read full backup using Foxflash programmer.
File alllready modifed by tuner.
Before i write I need to know do i need to reset adblue? I am not able to do it because of DTC
U010E Emissions Control Can Network (Urea Pump Gauge Module)
Can I upload write allready modfied file in this case and do i need to disconnect the module later. Does somone have experience with this to help?
PS IS IT VOLTAGE GOOD!? 13.6 V

Solution:

on MD1 ECUs ALLWAYS need to disconnect module.
On md1cs003 we always disconnect urea pump and module or If is a new type of fusebox i disconnect 30a fuse, diode and relay.
Resets better do before write mod but not always i do, but sometimes i do reset after if still urea light on dash flashing.

Fix Foxflash No VR File for Crafter 2021 DCM6.2V

Problem: VW Crafter 2021 dcm6.2v no go with foxflash. Virtual read obd2 not in database.

Solution:

On some models virtual file was not in database and solution on this is to upgrade or downgrade software version. Done it by ODIS Engineering software.

Or read it in boot mode with other programmers.

Foxflash Boot Mode Clone for Peugeot SID807EVO ECU

Foxflash report today: Clone PEUGEOT PARTNER SID807EVO ECU successfully.
SID807EVO
Read/Write BOOT MODE
Cloning ok
Checksum correction by foxflash.

NOTE:

No need to read password for PSA SID807EVO, only read and write.

If it is Ford SID807EVO, we need to read password first.

Some users also reported that the PADFlash programmer will clone this ECU on bench mode.