Honda HR-V Owners & Service Manuals

Honda HR-V: How to Troubleshoot the Climate Control System

How to Check for DTCs With the HDS

NOTE:

  • There are three methods used to check for DTCs. The recommended method is to use the Honda Diagnostic System (HDS) with the appropriate software, plugged into the data link connector (DLC).
  • The second method is to run the self-diagnostic function built into the climate control unit.
  • The third method is to use B-CAN system diagnosis test mode A - Refer to: Body Electrical Troubleshooting - B-CAN System Diagnosis Test Mode B - Control Unit Not Communicating, or Body Electrical Troubleshooting - B-CAN System Diagnosis Test Mode 1 and Test Mode 2 (without the HDS), or Body Electrical Troubleshooting - B-CAN System Diagnosis Test Mode A - Initial Communication and DTC Checks, or Body Electrical Troubleshooting - B-CAN System Diagnosis Test Mode D - No DTCs and Output Won't Turn ON, or Body Electrical Troubleshooting - B-CAN System Diagnosis Test Mode C - No DTCs and Output Won't Shut OFF.

1. Make sure the vehicle ignition is the OFF (LOCK) mode

2. Connect the HDS to the DLC (A) located under the driver's side of the dashboard.

HVAC System - Testing & Troubleshooting

3. Turn the vehicle to the ON mode.

4. Make sure the HDS communicates with the vehicle and the climate control unit. If it does not, go to the DLC circuit troubleshooting.

5. Select BODY ELECTRICAL in the System Selection Menu.

6. Select HVAC/Climate Control in the Body Electrical System Select.

7. Select DTCs in the HVAC/Climate Control Mode Menu.

8. Check for DTCs. If any DTCs are indicated, write down the DTCs, then go to the indicated DTC troubleshooting. If no DTCs are indicated, do all system scan, then refer to symptom troubleshooting.

NOTE:

  • After troubleshooting, clear the DTCs with the HDS.
  • For specific operations, refer to the user's manual that came with the HDS.

How to Use the Self-Diagnostic Function With the HDS

NOTE: This method is only available if the HDS can communicate with the climate control unit.

1. Make sure the vehicle ignition is the OFF (LOCK) mode.

2. Connect the HDS to the DLC.

3. Turn the vehicle to the ON mode.

4. Make sure the HDS communicates with the vehicle and the climate control unit. If it does not, go to the DLC circuit troubleshooting.

5. Select BODY ELECTRICAL in the System Selection Menu.

6. Select HVAC/Climate Control in the Body Electrical System Select.

7. Select Inspection in the HVAC/Climate Control Mode Menu.

8. Select Climate Control Unit Self Test in the Inspection Menu.

9. Check for DTCs. If any DTCs are indicated, write down the DTCs, then go to the indicated DTC troubleshooting.

NOTE:

  • After troubleshooting, clear the DTCs with the HDS.
  • For specific operations, refer to the user's manual that came with the HDS.

Icon/Indicator

Single A/C type

HVAC System - Testing & Troubleshooting

Dual A/C type

HVAC System - Testing & Troubleshooting

How to Use the Self-Diagnostic Function Without the HDS

The climate 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 and then the ON mode

2. Touch and hold the ON/OFF icon, then within 10 seconds touch and release the REAR WINDOW DEFOGGER/MIRROR DEFOGGER icon five times

3. ALL LCD segments come on for 2 seconds, then the self-diagnostic function begins.

NOTE:

  • The blower motor should run at various speeds when in the self-diagnostic mode.
  • If there is any problem in the system, the temperature indicator or driver's temperature indicator flashes.
  • Refer to checking for DTCs.
  • If there is more than one DTC, they are displayed one at a time in sequence followed by a pause (all the display indicator segments illuminate) between the DTCs.
  • If there are no problems detected, the system will flash "no".

Canceling the Self-Diagnostic Function

4. Turn the vehicle to the OFF (LOCK) mode, to cancel the self-diagnostic function. After completing repair work, run the self-diagnostic function again to make sure that there are no other DTCs.

How to Check the History DTCs

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

1. Turn the vehicle to the OFF (LOCK) mode and then the ON mode.

2. Touch and hold the ON/OFF icon, then within 10 seconds touch and release the MODE icon five times.

3. Then the history DTCs appear.

NOTE:

  • If there is any problem in the system, the temperature indicator or driver's temperature indicator flashes.

    Refer to checking for DTCs.

  • If there is more than one DTC, they are displayed one at a time in sequence followed by a pause (all the display indicator segments illuminate) between the DTCs.
  • If there are no problems detected, the system will flash "no".

Canceling the Read History DTCs

4. Turn the vehicle to the OFF (LOCK) mode, to cancel the read history DTCs. After completing the repair work, clear the history DTCs.

How to Clear the History DTCs

1. Turn the vehicle to the OFF (LOCK) mode and then the ON mode.

2. Touch and hold the AUTO icon, then within 10 seconds touch and release the WINDSHIELD DEFROSTER icon five times, while holding down the AUTO icon.

3. Wait until the WINDSHIELD DEFROSTER indicator blinks for 5 seconds and stops blinking and then release your finger from the auto icon.

4. Verify the history DTCs have been cleared.

Checking for DTCs

The temperature indicator display indicates single or multiple DTCs. If no DTCs are present, the indicator will flash "no".

NOTE: If the temperature indicator segments 05, 07, 09, 40, 43*1, 49, 55, and 89 indicators are on at the same time, there may be an open in the sensor common ground wire.

*1: Dual A/C type

HVAC System - Testing & Troubleshooting

HVAC System - Testing & Troubleshooting

HVAC System - Testing & Troubleshooting

Displaying Sensor Inputs at the Climate Control Unit

The climate control unit has a mode that displays the sensor inputs it receives. This mode shows you what the climate control unit is receiving from each of the sensors, one at a time, and it can help you determine if a sensor is faulty.

Checks Before Using the Sensor Input Display Mode

1. Turn the vehicle to the ON mode, and check the recirculation door function; touch the RECIRCULATION icon to switch from FRESH to RECIRC. The air volume and sound should change slightly.

2. Set the TEMPERATURE CONTROL icon to the desired test temperature:

  • "Lo" temperature setting will default to MAX COOL, VENT, and RECIRC (A/C on) or FRESH (A/C off).
  • "Hi" temperature setting will default to MAX HOT, HEAT or HEAT/DEF, and FRESH.

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

Run the Sensor Input Display Mode

1. Start the engine.

2. Touch and hold the AUTO icon, then within 10 seconds touch and release the RECIRCULATION icon five times.

3. The temperature indicator or driver's temperature indicator will flash the sensor number and then the value for that sensor. Record the value displayed.

4. To advance to the next sensor, touch the REAR WINDOW DEFOGGER/MIRROR DEFOGGER icon.

5. To cancel the sensor input display mode, touch the AUTO icon or turn the vehicle to the OFF (LOCK) mode.

NOTE:

  • The sensor values will be displayed in degrees Celsius (ºC) or an alphanumeric code. Use the chart to convert the value to degrees Fahrenheit (ºF).
  • If the sensor value displays "Er", this indicates there is an open or short in the circuit or sensor. Check for DTCs using the HDS, or use the climate control self-diagnostic function.
  • If necessary, compare the sensor input display to a known-good vehicle under the same test conditions.
  • If the sensor displayed value is out of the normal range, refer to the sensor test or substitute a known-good sensor, and recheck.

    For unsupported items, "--" will be shown on the display.

HVAC System - Testing & Troubleshooting

HVAC System - Testing & Troubleshooting

Celsius to Fahrenheit Conversion Table

HVAC System - Testing & Troubleshooting

Alphanumeric Conversion Table

HVAC System - Testing & Troubleshooting

Alphanumeric Conversion Table (Mode Positioning)

Display Reading (%) / Mode Position

01 - 03

HVAC System - Testing & Troubleshooting

22 - 28

HVAC System - Testing & Troubleshooting

47 - 53

HVAC System - Testing & Troubleshooting

72 - 78

HVAC System - Testing & Troubleshooting

96 -99

HVAC System - Testing & Troubleshooting

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