Honda HR-V: A/C Compressor Clutch Circuit Troubleshooting (KA/KC)
NOTE:
- It is normal for the A/C compressor to turn off under certain
conditions, such as low idle, high engine
coolant temperature, or hard acceleration.
- Do not use this troubleshooting procedure if the fans are also
inoperative with the A/C on. Refer to the
symptom troubleshooting index - Refer to: Heating and A/C Systems Symptom
Troubleshooting Index (Heating/Air Conditioning), or Climate Control System
Symptom Troubleshooting Index
(Climate Control).
- Before doing symptom troubleshooting, check for PGM-FI DTCs - Refer to:
How to Troubleshoot the
Fuel and Emissions Systems, or How to Troubleshoot the CVT System (CVT).
1. A/C pressure sensor performance check:
- Connect the HDS to the DLC - Refer to: How to Troubleshoot the Climate
Control System, or
How to Troubleshoot the Body Electrical.
- Start the engine.
- Set the A/C icon and the fan control icon to ON.
- Check the parameter(s) below with the HDS.
![HVAC System - Testing & Troubleshooting](images/books/1097/index 45(15).png)
Do the current condition(s) match the threshold?
YES
Go to step 2.
NO
Go to the A/C system test.
2. PGM-FI system parameter check:
Check the parameter(s) below with the HDS.
![HVAC System - Testing & Troubleshooting](images/books/1097/index 46(15).png)
Do the current condition(s) match the threshold?
YES
Go to step 3.
NO: A/C SWITCH is OFF
Replace the climate control unit.
NO: A/C SWITCH is ON and A/C CLUCH is OFF
Update the PCM if it does not have the latest software or substitute a
known-good PCM, and recheck.
3. Fuse check:
- Turn the vehicle to the OFF (LOCK) mode.
- Check the following fuse.
![HVAC System - Testing & Troubleshooting](images/books/1097/index 47(15).png)
Is the fuse OK?
YES
Go to step 4.
NO
Replace the fuse, and recheck. If the fuse blows again, repair a short in the
No. B14 (7.5 A) fuse circuit.
4. A/C compressor clutch relay check:
Remove the A/C compressor clutch relay from the auxiliary under-hood relay
box A, and test it.
Is the relay OK?
YES
Go to step 5.
NO
Replace the A/C compressor clutch relay.
5. Open wire check (+B MG CLUTCH line):
Measure the voltage between test points 1 and 2.
![HVAC System - Testing & Troubleshooting](images/books/1097/index 48(15).png)
![HVAC System - Testing & Troubleshooting](images/books/1097/index 100(14).png)
Is there battery voltage?
YES
The +B MG CLUTCH wire is OK. Go to step 6.
NO
Repair an open in the wire between the No. B14 (7.5 A) fuse in the under-hood
fuse/relay box and the
A/C compressor clutch relay. If the wire is OK, replace the under-hood
fuse/relay box.
6. Determine possible failure area (A/C compressor clutch relay switch side
circuit, A/C compressor clutch
relay coil side circuit):
Connect terminals A and B with a jumper wire.
![HVAC System - Testing & Troubleshooting](images/books/1097/index 101(14).png)
![HVAC System - Testing & Troubleshooting](images/books/1097/index 102(14).png)
Does the A/C compressor clutch click?
YES
Go to step 7.
NO
Go to step 9.
7. Open wire check (IG2 A/C line):
- Disconnect the jumper wire.
- Turn the vehicle to the ON mode.
- Measure the voltage between test points 1 and 2.
![HVAC System - Testing & Troubleshooting](images/books/1097/index 103(12).png)
![HVAC System - Testing & Troubleshooting](images/books/1097/index 104(13).png)
Is there battery voltage?
YES
The IG2 A/C wire is OK. Go to step 8.
NO
Repair an open in the wire between the A/C compressor clutch relay and the
No. C24 (7.5 A) fuse in the
under-dash fuse/relay box.
8. Open wire check (A/C MG CLUTCH RLY CL- line):
- Turn the vehicle to the OFF (LOCK) mode.
- Reinstall the A/C compressor clutch relay.
- Jump the SCS line with the HDS.
NOTE: This step must be done to protect the PCM from damage.
- Disconnect the following connector.
PCM connector A (51P)
- Connect terminals A and B with a jumper wire.
![HVAC System - Testing & Troubleshooting](images/books/1097/index 105(13).png)
- Turn the vehicle to the ON mode.
Does the A/C compressor clutch click?
YES
Update the PCM if it does not have the latest software or substitute a
known-good PCM, and recheck.
NO
Repair an open in the wire between the A/C compressor clutch relay and the
PCM.
9. Open wire check (A/C MG CLUTCH line):
- Disconnect the following connector.
A/C compressor clutch 1P connector
- Measure the voltage between test points 1 and 2.
![HVAC System - Testing & Troubleshooting](images/books/1097/index 106(13).png)
![HVAC System - Testing & Troubleshooting](images/books/1097/index 107(13).png)
Is there battery voltage?
YES
The A/C MG CLUTCH wire is OK. Check the A/C compressor clutch clearance and
the A/C
compressor clutch field coil. Repair as needed.
NO
Repair an open in the wire between the A/C compressor clutch relay and the
A/C compressor clutch.
READ NEXT:
NOTE:
It is normal for the A/C compressor to turn off under certain
conditions, such as low idle, high engine
coolant temperature, or hard acceleration.
Do not use this troubleshooting procedure
NOTE:
Do not use this troubleshooting procedure if the A/C compressor is
inoperative. Refer to the symptom
troubleshooting index - Refer to: Heating and A/C Systems Symptom
Troubleshooting Inde
NOTE:
Do not use this troubleshooting procedure if any of the following items
are operative with the A/C button
and the fan control dial ON: The A/C condenser fan, the radiator fan, or the
A/C
SEE MORE:
HANDSFREELINK SYSTEM TROUBLESHOOTING
NOTE:
Check the vehicle 12 volt battery condition first.
Before you troubleshoot, make sure to follow the General Troubleshooting
Information.
Make sure the Bluetooth cell phone is Honda approved and configured
correctly. Online, go to handsfreelink.honda
Removal
NOTE:
SRS components are located in this area. Review the SRS component
locations - Refer to: SRS
Component Location Index (KA/KC), and the precautions and procedures
before doing repairs or
service.
Do not release the lock lever until the steering column/EPS control unit
is insta