DTC U1280 (Telematics Control Unit)
WARNING: This page does not describe the selected car, but rather 8 other vehicles, including the 2025 Honda Odyssey, 2024 Honda Odyssey, 2023 Honda Odyssey, 2022 Honda Odyssey, and 2021 Honda Odyssey. However, it is still accessible from the selected car via links, so may be relevant.
DTC U1280 : Communication Bus Line Error (BUS-OFF)
| DTC Description | DTC |
|---|---|
| U1280 Communication bus line Error (BUS-OFF) |
DTCs (Telematics System)
NOTE:
- If you are troubleshooting multiple DTCs, be sure to follow the instructions in B-CAN System Diagnosis Test Mode A .
- Check the connectors for poor connections or loose terminals.
- Body control module DTC check
-1. Check for Body Control Module DTCs with the HDS.
DTC Description DTC U1280 Communication bus line Error (BUS-OFF) Is DTC U1280 indicated?
YES
Go to body control module DTC U1280 troubleshooting .
NO
Go to step 2.
- Problem verification
-1. Check for DTCs without the HDS .
Is DTC U1280 indicated?
YES
The failure is duplicated, go to step 3.
NO
Intermittent failure, the system is OK at this time.
- Open wire check (B-CAN H line, B-CAN L line)
-1. Turn the vehicle to the OFF (LOCK) mode.
-2. Open the driver's door, and wait more than 1 minute.
-3. Disconnect the following connectors.
Telematics control unit connector A (32P) Body control module connector B (36P) -4. Check for continuity between test points 1 and 2.
Test condition Vehicle OFF (LOCK) mode Telematics control unit connector A (32P): disconnected Body control module connector B (36P): disconnected Test point 1 Telematics control unit connector A (32P) No. 23 Test point 2 Body control module connector B (36P) No. 20 Test point 1 Telematics control unit connector A (32P) No. 22 Test point 2 Body control module connector B (36P) No. 21 Is there continuity?
YES
Replace the telematics control unit .
NO
Repair an open in the wire (s).