DTC B2240: Communication Error With CAN Box: Notes

WARNING: This page is about a different car, the 2012 Mitsubishi Lancer. However, it is still accessible from the selected car via links, so may be relevant.

CAUTION:

If DTC B2240 is set, be sure to diagnose the CAN bus line.
When replacing the CAN box unit or multivision display, always check that the communication circuit is normal. (Check that the voltage is 10 V or more.)

Fig 1: CAN Box Unit Communication Circuit Diagram

Courtesy of MITSUBISHI MOTOR SALES OF AMERICA.