Honda HR-V: DTC U128D (MICU) MICU Lost Communication With Gauge Control Module
NOTE : The DTC may be stored due to the grounding failure or the power source failure at the transmitting control unit (the grounding inspection and the power source inspection on each control unit are required prior to this checking process).
.png)
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.
.png)
Is DTC U128D indicated?
YES
Go to step 2.
NO
Intermittent failure, the system is OK at this time. Check for loose or poor connections.
2. Open wire check (B-CAN_H, B-CAN_L line):
- Turn the vehicle to the OFF (LOCK) mode.
- Disconnect the receiving control unit connector.
Under-dash fuse/relay box connector D (24P)
- Disconnect the transmitting control unit connector.
Gauge control module connector A (32P)
- Check for continuity between the receiving control unit and the transmitting control unit on the B-CAN_H circuit and the B-CAN_L circuit as specified in the table while in the vehicle OFF (LOCK) mode.
.png)
Is there continuity?
YES
The B-CAN_L to B-CAN_H wire is OK. Go to step 3.
NO
Repair an open or high resistance in the B-CAN_H and/or B-CAN_L wire(s) between the receiving control unit and the transmitting control unit.
3. Determine possible failure area (the receiving control unit or the transmitting control unit):
- Reconnect all connectors.
- Turn the vehicle to the ON mode.
- Clear the DTCs with the HDS.
Clear DTCs
- Check the DTCs with the HDS.
.png)
Is U128D indicated?
YES
Check for loose terminals and poor connections in the under-dash fuse/relay box connectors. Check is OK, replace the under-dash fuse/relay box.
NO
The under-dash fuse/relay box is OK at this time. Replace the gauge control module.
READ NEXT:
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
DTC B2A60-97 : FCW/LDW Camera/Multi Purpose Camera Dirty
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 (LDW
SEE MORE:
Playing the AM/FM Radio
*1:Some or all of the lists may not be displayed.
The ST indicator appears on the display indicating
stereo FM broadcasts.
Stereo reproduction in AM is not available.
Switching the Audio Mode
Press the SOURCE button on the steering wheel or
select SOURCE on the list.
You can also switch the mode
Disassembly and Reassembly
HVAC UNIT DISASSEMBLY AND REASSEMBLY
Exploded View
NOTE:
If the packings are damaged or torn, replace it with a new one.
For these operations, refer to the complete procedure as needed.
Air mix control motor removal and installation
Blower motor removal and installation
Blower power transis
