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Home >> Subaru >> 2019 >> WRX STI Limited >> Repair and Diagnosis >> Body & Frame >> Door Locks >> Immobilizer System (Diagnostics) >> Diagnostic Procedure with Diagnostic Trouble Code (DTC) >> DTC B1410: Transponder Communication

DTC B1410: Transponder Communication

DTC detecting condition: 

Communication failure between ignition key and body integrated unit

CAUTION: When the body integrated unit is replaced, registration of the immobilizer system is required. For details, refer to the "REGISTRATION MANUAL FOR IMMOBILIZER" provided as a separate volume.
  1. CHECK IGNITION KEY. 
    1. Remove the ignition key from the ignition switch.
    2. Insert the ignition key into the ignition switch, and then turn the ignition switch to ON.
    3. Perform the Clear Memory Mode. Refer to IMMOBILIZER (DIAGNOSTICS)>CLEAR MEMORY MODE .
    4. Read the DTC of the body integrated unit. Refer to IMMOBILIZER (DIAGNOSTICS)>READ DIAGNOSTIC TROUBLE CODE (DTC) .

    Is DTC B1410 displayed?

    Yes:  Go to  2.

    No:  Even if DTC is detected, the circuit has returned to a normal condition at this time. Reproduce the failure, and then perform the diagnosis again.

    NOTE: In this case, temporary poor contact of connector, temporary open or short circuit of harness may be the cause.
  2. CHECK IGNITION KEY. 
    1. Prepare a spare ignition key that is already registered.
    2. Insert the ignition key into the ignition switch, and then turn the ignition switch to ON.
    3. Read the DTC of the body integrated unit. Refer to IMMOBILIZER (DIAGNOSTICS)>READ DIAGNOSTIC TROUBLE CODE (DTC) .

    Is DTC B1410 displayed?

    Yes:  Go to  3.

    No:  Malfunction occurred in ignition key. Or, the key was unregistered.

  3. CHECK DTC. 

    Read the DTC of the body integrated unit. Refer to IMMOBILIZER (DIAGNOSTICS)>READ DIAGNOSTIC TROUBLE CODE (DTC) .

    Is DTC B1411 displayed?

    Yes:  Perform the diagnosis of DTC B1411.

    No:  Go to  4.

  4. CHECK IMMOBILIZER ANTENNA. 
    1. Insert the ignition key into the ignition switch, and then turn the ignition switch to ON.
    2. Perform the Clear Memory Mode. Refer to IMMOBILIZER (DIAGNOSTICS)>CLEAR MEMORY MODE .
    3. Read the DTC of the body integrated unit. Refer to IMMOBILIZER (DIAGNOSTICS)>READ DIAGNOSTIC TROUBLE CODE (DTC) .

    Is DTC B1410 displayed?

    Yes:  Replace the body integrated unit. Refer to SECURITY AND LOCKS>BODY INTEGRATED UNIT .

    No:  Malfunction occurred in the immobilizer antenna, ignition key, or body integrated unit.

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