Honda HR-V Owners & Service Manuals

Honda HR-V: DTC B1280 Turn Signal Switch Circuit Malfunction

Multiplex Integrated Control Unit (Micu) - Diagnostics

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:

  1. Turn the vehicle to the ON mode.
  2. Check the parameter(s) below with the HDS.

Multiplex Integrated Control Unit (Micu) - Diagnostics

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:

  1. Operate the turn signal switch to the left or right position.
  2. Check the parameter(s) below with the HDS.

Multiplex Integrated Control Unit (Micu) - Diagnostics

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):

  1.  Turn the vehicle to the OFF (LOCK) mode.
  2.  Disconnect the following connector.

Combination light switch 12P connector

  1. Connect terminals A and B with a jumper wire.

Multiplex Integrated Control Unit (Micu) - Diagnostics

Multiplex Integrated Control Unit (Micu) - Diagnostics

  1. Check the parameter(s) below with the HDS.

Multiplex Integrated Control Unit (Micu) - Diagnostics

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):

  1. Check the parameter(s) below with the HDS.

Multiplex Integrated Control Unit (Micu) - Diagnostics

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):

  1. Turn the vehicle to the OFF (LOCK) mode.
  2. Disconnect the following connector.

Combination light switch 12P connector

  1. Check the parameter (s) below with the HDS.

Multiplex Integrated Control Unit (Micu) - Diagnostics

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):

  1. Turn the vehicle to the OFF (LOCK) mode.
  2. Disconnect the following connector.

Combination light switch 12P connector

  1. Check the parameter(s) below with the HDS.

Multiplex Integrated Control Unit (Micu) - Diagnostics

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.

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