Bulletins & Advisories Air Condition Compressor Relay Failure

Discussion in 'Technical Articles' started by Ichiban, Thursday 29th Mar, 2012.

  1. Ichiban Founder Staff Team

    England CJ Leeds
    30,113
    6,373
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    If anyone you know is struggling to fix aircon issues use the information in here to assist members and friends.


    Models Affected

    Civic 3D FN1, FN2, FN3, FN4 All
    Civic 5D FK1, FK2, FK3 06, 07, 08, 09, 10, 11
    CR-V RE5 07, 08, 09, 10, 11
    CR-V I-CTDI RE6 07, 08, 09
    CR-V I-DTEC RE6 10, 11
    Jazz GG4, GG5, GG6 09, 10, 11, 12


    Honda TSB SM-10-002-00 Dated 27-03-12

    Symptom
    The air conditioning compressor magnetic clutch relay fails causing permanent Air Conditioning compressor clutch engagement, pressure loss and battery drain or no Air Conditioning compressor clutch engagement with no Air Conditioning function.

    Cause
    Moisture was able to penetrate the relay and mix with the nitrogen given off when the relay contacts arc. This created Nitric acid which
    corroded the contact points of the relay.


    Countermeasure
    To prevent Nitric acid forming the relay for use in the Air Conditioning compressor clutch circuit has been changed to one with improved
    sealing properties, this prevents moisture entering the relay. This relay is manufactured by Mitsuba and the previous Omron relay is
    no longer used in this application

    Application to Production Line
    SHHFN1***BU000969
    SHHFN2***BU000124
    SHHFN3***BU000130
    SHHFN4***BU002381
    SHHFK1***BU008231
    SHHFK2***BU009855
    SHHFK3***BU003386
    SHSRE5***BU010510
    SHSRE6***BU013580
    SHHGG5***CU001900
    SHHGG6***CU000550

    Repair Method
    1. Confirm the symptom reported by the customer.

    2. Check which type of compressor magnetic clutch relay is fitted to the fuse box. Note: The relay manufactures name is marked on the top of the relay.



    Air Condition Compressor Relay.JPG

    • If the relay is manufactured by Omron, replace the relay and any other components damaged as a result of the relay failure.
    • If the relay is manufactured by Mitsuba, carry out a relay test as per the workshop manual



    Parts Information
    <Part Number> <Part Name>
    39794-SDA-A05 RELAY ASSY., POWER (MICRO ISO) (MITSUBA)
    Care should be taken when ordering a replacement relay, The Omron relay is a common relay and is still available and can be used for other circuits on the vehicle. For the Air Conditioning clutch circuit the Omron relay MUST NOT be used. If a Mitsuba relay is required, please order the part number shown as above.
     
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  2. Beefy Expert Advisor ★ ★ ★ ★ ★

    United Kingdom Stoke
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    those relays are the bain of my life! about time a TSB came out for them.
     
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  3. Ichiban Founder Staff Team

    England CJ Leeds
    30,113
    6,373
    516
    I bet they are bud...I simples really ditch the European relay maker and rely on a Japanese vendor.

    another reason not to buy European made Honda. they are filled with German poo
     
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