Honda HR-V: How to Troubleshoot the Heating and A/C Systems (KA/KC)

Button/Switch/Indicator

How to Use the Self-Diagnostic Function

The HVAC control unit has a self-diagnostic function. To run the self-diagnostic function, do the following:

1. Turn the vehicle to the OFF (LOCK) mode.

2. Press and hold the RECIRCULATION button and REAR WINDOW DEFOGGER button, then turn the vehicle to the ON mode.

3. The RECIRCULATION indicator comes on for 2 seconds, then the self-diagnostic function begins.

How to Check the History DTCs

The HVAC control unit can record history DTCs. To read the history DTCs, do the following:

1. Turn the vehicle to the OFF (LOCK) mode.

2. The heater fan switch is OFF.

3. Press and hold the REAR WINDOW DEFOGGER button and A/C button, then turn the vehicle to the ON mode.

How to Clear the History DTCs

1. Turn the vehicle to the OFF (LOCK) mode.

2. The heater fan switch is ON.

3. Press and hold the REAR WINDOW DEFOGGER button and A/C button, then turn the vehicle to the ON mode.

4. The A/C indicator goes off for 5 seconds.

5. Verify the History DTCs have been cleared, the A/C indicator flashes.

Checking for DTCs

1. If there is any problem in the system, indicator flashes

2. The RECIRCULATION indicator flashes, once the self-diagnostic function finishes

3. The REAR WINDOW DEFOGGER indicator flashes, once the history DTCs checking finishes

4. If there is more than one DTC, the DTC with the least number of blinking times will be indicated on the indicator

5. If no DTCs are present, indicator goes off.

1. Low 12 volt battery voltage failure
2. HVAC control unit internal error
3. A problem in the recirculation control motor circuit, linkage, door, or motor
4. An open in the recirculation control motor circuit
5. A short in the recirculation control motor circuit
6. An open or a short in the outside air temperature sensor circuit

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