Honda HR-V: DTC B1280 Turn Signal Switch Circuit Malfunction
![Multiplex Integrated Control Unit (Micu) - Diagnostics](images/books/1097/index 249(13).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. Turn signal/hazard warning lights system check 1:
- Turn the vehicle to the ON mode.
- Check the parameter(s) below with the HDS.
![Multiplex Integrated Control Unit (Micu) - Diagnostics](images/books/1097/index 250(14).png)
Are both data list values indicated OFF?
YES
Go to step 2.
NO
Go to step 4.
2. Turn signal/hazard warning lights system check 2:
- Operate the turn signal switch to the left or right position.
- Check the parameter(s) below with the HDS.
![Multiplex Integrated Control Unit (Micu) - Diagnostics](images/books/1097/index 251(14).png)
Are both data list values indicated ON?
YES
Go to step 3.
NO
Intermittent failure, the system is OK at this time.
3. Shorted wire check (R TURN SW to L TURN SW line):
- Turn the vehicle to the OFF (LOCK) mode.
- Disconnect the following connector.
Combination light switch 12P connector
- Connect terminals A and B with a jumper wire.
![Multiplex Integrated Control Unit (Micu) - Diagnostics](images/books/1097/index 252(12).png)
![Multiplex Integrated Control Unit (Micu) - Diagnostics](images/books/1097/index 253(12).png)
- Check the parameter(s) below with the HDS.
![Multiplex Integrated Control Unit (Micu) - Diagnostics](images/books/1097/index 254(12).png)
Are both data list values correct?
YES
The R TURN SW wire and the L TURN SW wire is not shorted. Replace the
combination light switch.
NO
Repair a short between the wires.
4. Shorted wire check (L TURN SW line or R TURN SW line):
- Check the parameter(s) below with the HDS.
![Multiplex Integrated Control Unit (Micu) - Diagnostics](images/books/1097/index 255(12).png)
Is Turn Signal Switch (LEFT) value ON?
YES
Go to step 5.
NO
Go to step 6.
5. Shorted wire check (L TURN SW line):
- Turn the vehicle to the OFF (LOCK) mode.
- Disconnect the following connector.
Combination light switch 12P connector
- Check the parameter (s) below with the HDS.
![Multiplex Integrated Control Unit (Micu) - Diagnostics](images/books/1097/index 256(11).png)
Is Turn Signal Switch (LEFT) value ON?
YES
Repair a short to ground in the wire.
NO
The L TURN SW wire is OK. Replace the combination light switch.
6. Shorted wire check (R TURN SW line):
- Turn the vehicle to the OFF (LOCK) mode.
- Disconnect the following connector.
Combination light switch 12P connector
- Check the parameter(s) below with the HDS.
![Multiplex Integrated Control Unit (Micu) - Diagnostics](images/books/1097/index 257(11).png)
Is Turn Signal Switch (RIGHT) value ON?
YES
Repair a short to ground in the wire.
NO
The R TURN SW wire is OK. Replace the combination light switch.
READ NEXT:
DTC Troubleshooting: B1281, B1282, B1283, B1284
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
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
Diagn
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
SEE MORE:
Removal & Installation
1. Moonroof Glass - Remove
Remove the bolts with a TORX T25 bit
Repeat on the opposite side.
Remove the glass (A) by lifting it up.
2. All Removed Parts - Install
Install the parts in the reverse order of removal.
3. Moonroof Glass Position - Adjust
4. Water Le
Removal & Installation
1. Front Bumper - Remove
2. Horn - Remove
Fig. 2: (High) Horn Bracket Torque Specifications
Fig. 3: (Low) Horn Bracket Torque Specifications
Horn (High)
Disconnect the connector (A)
Horn (Low)
Remove the horn (B).
3. All Removed Parts - Install
Install the parts