DTC B2240: Communication error with CAN Box: Notes

CAUTION:

If DTC B2240 is set, be sure to diagnose the CAN bus line.
When replacing the ECU, 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.