2006 Honda CR-V EX, 2.4 RD6FACTORY OEM SERVICE PROCEDURE

A/C Signal Circuit Troubleshooting

  1. Start the engine.
  2. Turn the blower switch on.
  3. Turn the A/C switch on.
  4. Check the A/C CLUTCH in the DATA LIST with the HDS.

    Does it indicate ON? 

    1. YES -  Go to step 5.
    2. NO -  Go to the A/C pressure switch circuit troubleshooting (see A/C PRESSURE SWITCH CIRCUIT TROUBLESHOOTING ).
  5. Check the A/C system.

    Does the A/C system operate? 

    1. YES -  The air conditioning system circuit is OK.
    2. NO -  Go to step 6.
  6. Turn the ignition switch OFF.
  7. Turn the ignition switch ON (II).
  8. Activate the A/C CLUTCH in the INSPECTION MENU with the HDS.

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

    1. YES -  Do the A/C system test (see A/C SYSTEM TEST ).
    2. NO -  Go to step 9.
  9. Momentarily connect under-hood fuse/relay box 14P connector terminal No. 10 to body ground with a jumper wire several times.
    Fig 1: Connecting Under-Hood Fuse/Relay Box 14P Connector Terminal No. 10 To Body Ground With Jumper Wire Several Times
    G03674212Courtesy of AMERICAN HONDA MOTOR CO., INC.

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

    1. YES -  Repair open in the wire between the ECM/PCM (E18) and the A/C clutch relay.
    2. NO -  Update the ECM/PCM if it does not have the latest software, or substitute a known-good ECM/PCM (see ECM/PCM UPDATING AND SUBSTITUTION FOR TESTING ), then recheck. If the symptom/indication goes away with a known-good ECM/PCM, replace the original ECM/PCM (see ECM/PCM REPLACEMENT ).
Factory Service Tools

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When to See a Mechanic

Stop DIY work and contact a certified mechanic immediately if any of the following apply:

  • • You smell fuel, burning insulation, or see smoke.
  • • Brakes feel soft, pull hard to one side, or make grinding noises.
  • • The engine overheats, stalls repeatedly, or misfires under load.
  • • You are missing required tools, torque specs, or safe lifting equipment.
  • • You are not confident in the next step or safety outcome.

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