Honda HR-V Owners & Service Manuals

Honda HR-V: A/C Signal Circuit Troubleshooting

Honda HR-V (2015-2021) Service Manual / Engine / Engine Control System & Engine Mechanical - Testing & Troubleshooting / Troubleshooting / A/C Signal Circuit Troubleshooting

1. A/C compressor clutch condition check.

  1. Start the engine, and let it idle.
  2. Turn the blower switch on.
  3. Turn the A/C switch on.
  4. Check the parameter(s) below with the HDS.

Engine Control System & Engine Mechanical - Testing & Troubleshooting

Do the current condition(s) match the threshold?

YES

Go to step 2.

NO

Do the A/C system test.

2. A/C system check.

  1. Check the A/C system.

Does the A/C system operate?

YES

The A/C system circuit is OK.

NO

Go to step 3.

3. A/C compressor clutch circuit check.

  1. Turn the vehicle to the OFF (LOCK) mode.
  2. Turn the vehicle to the ON mode.
  3. Activate the A/C CLUTCH in the INSPECTION MENU with the HDS.

A/C CLUTCH

Is there a clicking noise from the A/C compressor clutch?

YES

The A/C compressor clutch circuit is OK. Do the A/C system test.

NO

Go to step 4.

4. Open wire check (A/C MG CLUTCH RLY CL- line).

  1. Turn the vehicle to the OFF (LOCK) mode.
  2. Jump the SCS line with the HDS.

SCS Short

  1. Disconnect the following connector.

PCM connector A (51P)

  1. Turn the vehicle to the ON mode.
  2. Connect terminals A and B with a jumper wire.

Engine Control System & Engine Mechanical - Testing & Troubleshooting

Is there a clicking noise from the A/C compressor clutch?

YES

The A/C MG CLUTCH RLY CL- wire is OK. Update the PCM if it does not have the latest software, or substitute a known-good PCM, then recheck. If the symptom/indication goes away and the PCM was updated, troubleshooting is complete. If the symptom/indication goes away and the PCM was substituted, replace the original PCM.

NO

Check for poor connections or loose terminals at the A/C compressor clutch relay and the PCM. If the connections and terminals are OK, check the A/C compressor clutch relay. If needed, repair an open in the A/C MG CLUTCH RLY CL- wire between the PCM (A12) and the A/C compressor clutch relay, or other parts in the A/C systems.

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