Honda HR-V: DTC U1281, U128D (Keyless Access Power Control Unit)
NOTE:
- Refer to the DTC code shown on the display, and then inspect the
connectors and terminals based on the instructions in the table below.
- 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).
DTCs (Power Control Unit)
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.
Are any DTCs indicated?
YES
Go to step 2.
NO
Intermittent failure, the system is OK at this time. Check for poor
connections or loose terminals at the
transmitting control units, and keyless access control unit.
2. Open wire check (B-CAN_H, B-CAN_L lines):
- Turn the vehicle to the OFF (LOCK) mode.
- Disconnect the receiving control unit connector.
Keyless access control unit connector C (20P)
- Disconnect the transmitting control unit connectors.(Refer to the DTC
code shown on the display, and
then disconnect the connector(s) based on the instructions in the table
below.)
Under-dash fuse/relay box connector H (20P)
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 mode.
Is there continuity?
YES
The B-CAN_H and B-CAN_L wires are OK. Go to step 3.
NO
Repair an open in the B-CAN_H and/or B-CAN_L wires 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 the following connectors.
Keyless access control unit connector C (20P)Gauge control module connector A
(32P)Under-dash
fuse/relay box connector H (20P)
- Turn the vehicle to the ON mode.
- 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.
Are any DTCs indicated?
YES
Replace the keyless access control unit.
NO
The keyless access control unit is OK at this time, replace the transmitting
control unit. (Refer to the DTC code shown on the display, and then replace the control unit based on the
instructions in the table
below.)
READ NEXT:
DTC TROUBLESHOOTING
DTC B1575 AUTO LIGHT SENSOR ERROR
DTC (Automatic Lighting Control Unit)
NOTE: If you are troubleshooting multiple DTCs, be sure to follow the
instructions in B-CAN System
Diagnos
MULTIPLEX INTEGRATED CONTROL SYSTEM DESCRIPTION - CONTROL/FUNCTION
Self-Diagnostic Function
The MICU provides the self-diagnostic function for checking the communication
and input systems.
Communicat
SEE MORE:
The following pages explain your vehicle's safety features and how to use
them
properly. The safety precautions below are ones that we consider to be among the
most important.
Important Safety Precautions
Some states, provinces and territories prohibit the use
of cell phones other than hands-free d
Removal and Installation
SRS components are located in this area. Review the SRS component locations -
Refer to: SRS Component
Location Index (KA/KC), or SRS Component Location Index (KA/KC) and the
precautions and
procedures before doing repairs or service.
1. 12 Volt Battery Terminal - Disconnec