With Navigation
DTC U0073: F-CAN Malfunction (Bus-Off)With Navigation system
1. Turn the ignition switch ON (II).
2. Clear the DTC with the HDS.
3. Check for Temporary DTCs or DTCs with the HDS.
Is DTC U0073 and/or U0155 indicated?
YES - Go to step 4.
NO - Intermittent failure, system is OK at this time. Check for poor connections or loose terminals at the gauge control module, the navigation unit, and the ECM/PCM.
4. Check for Body Electrical DTCs in the DTCs MENU with the HDS.
Is DTC B1168, B1169, and/or B1178 indicated?
YES - Go to step 5.
NO - Do the gauge control module input test.
5. Remove the gauge control module.
6. Turn the ignition switch OFF.
7. Disconnect the gauge assembly 30P connector.
8. Disconnect the navigation unit 20P connector.
9. Jump the SCS line with the HDS.
10. Disconnect ECM/PCM connector E (31P).
11. Check for continuity between gauge assembly 30P connector terminal No. 24 and body ground, and between terminal No. 23 and body ground individually.
Is there continuity?
YES - Repair short in the wire between the gauge control module, the navigation unit, and the ECM/PCM(E11 (E24)*), then go to step 20.
NO - Go to step 12.
*: CANL line
12. Check for continuity between gauge assembly 30P connector terminal No. 24 and ECM/PCM connector terminal E11, and between gauge assembly 30P connector terminal No. 23 and ECM/PCM connector terminal E24 individually.
Is there continuity?
YES - Go to step 13.
NO - Repair open in the wire between the gauge control module and the ECM/PCM (E11 (E24)*), then go to step 20.
*: CANL line
13. Check for continuity between ECM/PCM connector terminals E11 and E24.
Is there continuity?
YES - Repair short in the wire between ECM/PCM connector terminals E11 and E24*, then go to step 20.
NO - Go to step 14.
*: CANL line
14. Reconnect ECM/PCM connector E (31P) and the gauge assembly 30P connector.
15. Turn the ignition switch ON (II).
16. Clear the DTC with the HDS.
17. Check for Temporary DTCs or DTCs in the DTCs MENU with the HDS.
Is DTC U0073 and/or U0155 indicated?
YES - Go to step 18.
NO - Replace the navigation unit, then go to step 20.
18. Update the ECM/PCM if it does not have the latest software, or substitute a known-good ECM/PCM.
19. Check for Temporary DTCs or DTCs with the HDS.
Is DTC U0073 and/or U0155 indicated?
YES - If DTC U0073 and/or U0155 is indicated, check for poor connections or loose terminals at the gauge assembly, the navigation unit, and the ECM/PCM, then go to step 1. If any other Temporary DTCs or DTCs are indicated, go to the indicated DTC's troubleshooting.
NO - If the ECM/PCM was updated, troubleshooting is complete. If the ECM/PCM was substituted, replace the original ECM/PCM.
20. Reconnect the all connectors.
21. Turn the ignition switch ON (II).
22. Reset the ECM/PCM with the HDS.
23. Do the ECM/PCM idle learn procedure.
24. Check for Temporary DTCs or DTCs with the HDS.
Are any Temporary DTCs or DTCs indicated?
YES - If DTC U0073 and/or U0155 is indicated, check for poor connections or loose terminals at the gauge assembly, the navigation unit, and the ECM/PCM, then go to step 1. If any other Temporary DTCs or DTCs are indicated, go to the indicated DTC's troubleshooting.
NO - Troubleshooting is complete.