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Exterior Lights - Led Headlight Does Not Come On

  1. DTC check 1

    -1. Connect the HDS to the data link connector (DLC). How to Connect the HDS

    - 2. Check for DTCs with the HDS.

    DTC Description DTC
    B1081 Left Side LED Headlight Malfunction  
    B1082 Left Side LED Headlight Circuit Malfunction  
    B1083 Right Side LED Headlight Malfunction  
    B1084 Right Side LED Headlight Circuit Malfunction  

    Are DTCs B1081, B1082, B1083, and/or B1084 indicated?

    YES 

    Do the indicated DTC's troubleshooting.

    NO 

    Go to step 2.

  2. Combination light switch HEADLIGHT position check

    -1. Turn the combination light switch ON.

    - 2. Check the parameter(s) below with the HDS.

    Signal Threshold Current conditions
    Values Unit Values Unit
    Headlight Switch (HEADLIGHT) ON      

    Is data list values correct?

    YES 

    Intermittent failure, the system is OK at this time. Check for loose or poor connections.

    NO 

    Go to step 3.

  3. Combination light switch check

    -1. Turn the vehicle to the OFF (LOCK) mode.

    - 2. Do the combination light switch test. Combination Light Switch - Test

    Is the switch OK?

    YES 

    Go to step 4.

    NO 

    Replace the Combination Light Switch - Removal and Installation .

  4. Open wire check (H/L ON SW line) 1

    -1. Measure the voltage between test points 1 and 2.

    Test condition Vehicle OFF (LOCK) mode
    Combination light switch 12P connector: disconnected
    Test point 1 Combination light switch 12P connector No. 7
    Test point 2 Body ground
    GHH308867Courtesy of HONDA, U.S.A., INC.

    Is there battery voltage?

    YES 

    Go to step 5.

    NO 

    Go to step 6.

  5. Open wire check (COMBI SW GND(LT) line)

    -1. Check for continuity between test points 1 and 2.

    Test condition Vehicle OFF (LOCK) mode
    Combination light switch 12P connector: disconnected
    Test point 1 Combination light switch 12P connector No. 6
    Test point 2 Body ground
    GHH308868Courtesy of HONDA, U.S.A., INC.

    Is there continuity?

    YES 

    The COMBI SW GND(LT) wire is OK. Faulty combination light switch; Combination Light Switch - Test .

    NO 

    Repair an open or high resistance in the wire.

  6. Open wire check (H/L ON SW line) 2

    -1. Disconnect the following connector.

    Under-dash fuse/relay box connector N (20P)

    - 2. Check for continuity between test points 1 and 2.

    Test condition Vehicle OFF (LOCK) mode
    Combination light switch 12P connector: disconnected
    Under-dash fuse/relay box connector N (20P): disconnected
    Test point 1 Under-dash fuse/relay box connector N (20P) No. 19
    Test point 2 Combination light switch 12P connector No. 7
    GHH308869Courtesy of HONDA, U.S.A., INC.

    Is there continuity?

    YES 

    The H/L ON SW wire is OK. Faulty MICU; replace the Under-Dash Fuse/Relay Box - Removal and Installation .

    NO 

    Repair an open or high resistance in the wire.

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