F-CAN Lost Communication With ECM/PCM

DTC Troubleshooting: U0100

DTC U0100:

F-CAN Lost Communication with ECM/PCM

1. Connect the HDS to the DLC.

2. Clear the DTC with the HDS.

3. Turn the ignition switch to LOCK (0), or press the engine start/stop button to select the OFF mode. and then back to ON (II), or the ON mode.

4. Check for DTC with the HDS.

Is DTC U0100 indicated?

YES -

Go to step 5.

NO -

Intermittent failure, the F-CAN communication line is OK at this time. Check for poor connections or loose terminals at the AcuraLink control unit (XM receiver).�

5. Turn the ignition switch to LOCK (0), or press the engine start/stop button to select the OFF mode.

6. Disconnect AcuraLink control unit (XM receiver) connector A (32P).

7. Jump the SCS line with the HDS.

8. Disconnect ECM/PCM connector A (49P).

9. Check for continuity between AcuraLink control unit (XM receiver) connector A (32P) terminals No. 6 and No. 7 and ECM/PCM connector A (49P) terminals No. 49 and No. 48 respectively.





Is there continuity?

YES -

Check for poor connections or loose terminals at the AcuraLink control unit (XM receiver). If all connections are OK, replace the AcuraLink control unit (XM receiver) AcuraLink Control Unit-XM Receiver Removal/Installation (With AcuraLink (USA Models With Navigation)).�

NO -

Repair an open in the wire between the AcuraLink control unit (XM receiver) and the ECM/PCM.�