Possible causes of fault
NOTE:
- Cyclical monitoring and comparison of the terminal 15 digital signal (KESSY control unit) received via CAN comfort and the incoming terminal 15 analogue signal (KESSY control unit) is performed in the rear convenience system control unit. If different comparison values are detected, a fault is stored in the fault memory.
- Compares the incoming terminal 15 analogue signal (KESSY control unit) with the terminal 15 digital signal (implausible signal), which the KESSY control unit sends to CAN comfort
- Fuse in fuse carrier at left of dashboard (F53, [5A])
- Open circuit
- Short circuit to B+
- Short circuit to ground