Diagnostic Trouble Codes (DTC)
WARNING: This page is about a different car, the 2008 Acura TL and 2007 Acura TL. However, it is still accessible from the selected car via links, so may be relevant.
There are three types of DTCs used by the CAN networks.
DIAGNOSTIC TROUBLE CODES CHART
| Internal error DTCs | The ECUs run internal checks. If one finds that there is an internal ECU problem, it will set an internal error DTC. Confirm that the battery and charging system are OK. If so, this indicates that the ECU needs to be replaced. |
| Loss of communication DTCs | 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 (as called out in the DTC Troubleshooting). |
| Signal error DTCs | The ECUs can run diagnostics on some input circuits to determine if those circuits are functioning properly (no opens or shorts). If a circuit fails the diagnostic test, a DTC will set. (NOTE: Not all input circuit are tested for errors.) |