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.
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.
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.
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.
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.
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.
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.
- 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.
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:
NOTE : Before you troubleshoot, review the how to troubleshoot information -
Refer to: How to Troubleshoot
the Forward Collision Warning (FCW), or How to Troubleshoot the Lane Departure
Warning (LDW).
DTCs (FCW/LDW)
1. Problem verification.
Turn the vehicle to the ON mode.
Clear the DTC with t
Removal
Do not spill brake fluid on the vehicle; it may damage the paint. If brake
fluid gets on the paint, wash it off
immediately with water.
NOTE:
Be careful not to damage or deform the brake lines during removal.
To prevent the brake fluid from dripping, plug and cover the hose ends
and j