Honda HR-V: DTC U1280 (MICU) B-CAN Communication Bus Line Error (BUS-OFF)
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DTC (MICU)
NOTE : If you are troubleshooting multiple DTCs, be sure to follow the instructions in B-CAN System Diagnosis Test Mode A - Refer to: Body Electrical Troubleshooting - B-CAN System Diagnosis Test Mode A - Initial Communication and DTC Checks.
1. Problem verification:
- Clear the DTCs with the HDS.
Clear DTCs
- Turn the vehicle to the OFF (LOCK) mode and then the ON mode.
- Wait for at least 6 seconds.
- Check for DTCs with the HDS.
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Is DTC U1280 indicated?
YES
Go to step 2.
NO
Intermittent failure, the system is OK at this time. Check for loose or poor connections.
2. B-CAN related units check:
- Turn the vehicle to the OFF (LOCK) mode.
- Disconnect the appropriate connector at each control unit in the table one at a time. Clear the DTC, then recheck for DTCs after each unit is disconnected.
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Clear DTCs
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Is DTC U1280 indicated with each individual unit disconnected?
YES
Leave the connectors disconnected, and go to step 3.
NO
Replace the control unit that was disconnected when DTC U1280 did not reset.
3. Shorted wire check (B-CAN lines) 1:
- Turn the vehicle to the OFF (LOCK) mode.
- Disconnect the following connectors.
Under-dash fuse/relay box connector D (24P) Under-dash fuse/relay box connector H (20P)
- Check for continuity between test points 1 and 2.
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Is there continuity?
YES
Repair a short to ground in the B-CAN wires.
NO
Go to step 4.
4. Shorted wire check (B-CAN lines) 2:
- Check for continuity between test points 1 and 2.
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Is there continuity?
YES
Repair a short to ground in the B-CAN wires.
NO
Go to step 5.
5. Shorted wire check (B-CAN_L to B-CAN_H line) 1:
- Check for continuity between test points 1 and 2.
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Is there continuity?
YES
Repair a short in the B-CAN_L to B-CAN_H wire.
NO
Go to step 6.
6. Shorted wire check (B-CAN_L to B-CAN_H line) 2:
- Check for continuity between test points 1 and 2.
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Is there continuity?
YES
Repair a short in the B-CAN_L to B-CAN_H wire.
NO
The B-CAN_L to B-CAN_H wire is OK. Faulty MICU; replace the under-dash fuse/relay box.
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failure at the transmitting
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control unit
DTC B2A60-54 FCW/LDW Camera Unit/Multi Purpose Camera Unit Aiming
Incomplete
NOTE :
Before you troubleshoot, review the how to troubleshoot information -
Refer to: How to Troubleshoot
the Forward Collision Warning (FCW), or How to Troubleshoot the Lane
Departure Warning
SEE MORE:
Anti-Lock Brake Safety Precautions
* PLEASE READ THIS FIRST *
This article is intended for general information purposes only. This
information may not apply to all makes and
models. If vehicle is equipped with Anti-Lock Brake System (ABS), refer to
appropriate ANTI-LOCK BRAKE
SYSTEM article in the BRAKES section for description, op
Audio Unit Removal and Installation (Color Audio Type (5-inch Screen)
Removal & Installation
NOTE:
When working on electronic components, make sure the work area is clean
and dust free.
Make sure your hands are clean and free of oils and grease.
Eject the CD before disconnecting the audio unit to prevent damaging the
CD player's load mechanism.
If you are
