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Seat heater is ON after remote started

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2008 BMW 523LI. Installed with Viper 5704+PKALL+INT BMW2

Everything works well. I didnt turn on seat heater or AC before get off car. It is closed to summer here.However, the seat heater at driver side is On after remote started.

If I start the car by key, everything is fine.

It is D2D between 5704 and PKALL. INTBMW2 is W2W.

From car side, there are Can-H/L, Ignition and footbrakes connected.

What causes this happen? I am sure I didn't connect anything to heater or AC.
asked May 18, 2017 in BMW by stan hui (300 points)

1 Answer

0 votes
Also looking at the coverage for the evo-all heated seats are not covered.

The key used for immobilizer bypass probably has its own preset.

Remote start the vehicle.

Turn off the heated seats and set any other presets desired.

Then shut the vehicle down.

Test remote start at this point and see if heated seats are still on.
answered May 18, 2017 by Derek (172,610 points)
SInce it's a directed piece they may have added coding for heated seats. Fortin does send any CAN bus commands to enable them...


Unless maybe there's a physical connection somewhere causing them to turn on whenever the RS is engaged.


I would also take the valet key that is wrapped (used for the RS install) out and start the car with it; WIHTOUT THE SMART KEY ANYWHERE NEAR THE CAR. Just to see if the driver side heated seat comes on.  As Derek said, issue like this are normally because of user presets saved to key 1, 2, 3, etc.... .
Hi, Robb,


I said this on previous post. I had tested the valet key(wrapped for RS). It starts the car, everything is fine. Heaters are not ON. It keeps the last status.

So I dont think it is preset issue.

DEI's international support didn't answer this. Seems they don't know anything.
Honestly, you have an odd issue going on that has never been seen and cannot be replicated.


Aside from the required connections, what else is connected? parking lights? Have you tried without parking lights connected?
I would also suggest trying the 4.18 firmware on the PK-ALL.  Once flashed back to the original firmware, reset and reprogram the unit. Reset procedure i think you know, but just in case, here is the procedure: http://wirecolor.com/en/qa/50193/faq-how-do-i-reset-my-evo-all?show=50193#q50193


Little note. Back in the day, units had to be flashed with D2D firmware unlike today where it's an option to be enabled. I would suggest scrapping D2D completely to help isolate your heated seat issue.
Tonight customer comes back.

I remote start the car, then unplug the 4p data wire.

Then press unlock. Heaters are not ON. So, the heater ON command is sent from CANBUS network not wiring.

Then I connect back the 4P data wire.

 I find a funny thing. I press one more time unlock, the heater tempreture level goes down 1 grid. press..press..the heater is OFF. Press, heater is ON.

It seems the remote control can adjust the seat heater cycling from OFF to ON.

If you have newer firmware to fix this, could you send it to me? I have all kinds of MCU tools.