Accessory mode signal error
Check that the CAN signal AccessoryModeStatus is available from BCI. Check and correct trouble codes in the chassis to eliminate faults that may prevent the messages from beeing sent. If there are more fault codes for message or communication error, check the CAN bus wiring on both sides of the chassis system's gateway and its power supply.
What you'll see
Functions that should work in accessory mode, such as doors and lighting, will not work until ignition is turned on.
System reaction
The vehicle cannot enter accessory state. Functionality that should be functioning in accessory mode will be degraded. In ignition the vehicle should behave as normal.
Diagnostic depth
BCI will send the CAN signal for accessory mode status with value Error.
Short circuit, cable break or lose connector on the relevant pin(s) in the BCI.