Honda Remote Control Starter System Service Manual: 2007 CR-V
7.2 Diagnostic Trouble codes for the B-CAN systems
There are 3 types of diagnostics available for the B-CAN communication system
•
Internal Error DTCs
•
Loss of Communication DTCs
•
Signal Error DTCs
Internal Error DTCs
Loss of Communications DTCs
Signal Error DTCs
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Table of Contents
The ECUs run internal checks. If one finds that
there is an internal ECU problem, it will set an
internal error DTC. This indicates that the ECU
needs to be replaced.
Loss of communication DTCs (and BUS-off
DTCs) are set when there is a problem with the
communication between ECUs. This could be
in the connections, the wiring or the ECU.
The ECUs can run diagnostics on some input
circuits to determine if that circuit is functioning
properly (no open or short circuits). If a circuit
fails the diagnostic test, a DTC will set (NOTE:
Not all input circuits are tested for errors.)