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DTC B2240: Communication Error With Can Box: Notes

WARNING: This page is about a different car, the 2008 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 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
    G05397042Courtesy of MITSUBISHI MOTOR SALES OF AMERICA.
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