I'm having a problem with my 2010 Citroën Jumpy / Dispatch, 2.0 HDi 163 HP with FAP.
I was playing around with the CAN bus just out of curiosity.
By mistake, I sent random CAN frames to the comfort CAN bus. The car started blinking every light it has, and the doors suddenly locked and unlocked several times. I think that by doing this I may have written some invalid configuration to the BSI.
The car still starts and drives. At first I had some fault codes about unknown CAN messages.
However, the tailgate won't unlock anymore, and I'm afraid there may be more functions that are not working correctly without me noticing it yet.
What I already tried:
- With Diagbox, I can unlock the latch using the actuator test, so the latch itself is working. But pressing the tailgate button is not detected. I cannot find any value in the live data that changes when the button is pressed.
- The wiring seems to be OK:
I measured between the 40V BE connector on the BSI and ground. I get continuity when the tailgate button is pressed.
At the connector on the tailgate, I have the BSI's +12 V pull-up voltage, but when I pull the signal to ground, the BSI does not detect it. - I also tried changing some configuration values in the BSI and then changing them back, hoping it would fix the problem, but without any luck.
- Of course, I also tried the BSI reboot procedure described in various places, disconnected the battery for several hours, and even pulled the SH shunt to reset the BSI.
Any help would be very much appreciated! I'm starting to run out of ideas.
