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ACTIVE NOISE CONTROL SYSTEM, Diagnostic DTC:B1AAA96, B1AAB1C

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DTC Code DTC Name
B1AAA96 Rear Center Microphone Circuit Component Internal Failure
B1AAB1C Rear Center Microphone Circuit Circuit Voltage Out of Range
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DESCRIPTION

These DTCs are stored when a malfunction occurs in the No. 3 active noise control microphone system.

DTC No. Detection Item DTC Detection Condition Trouble Area
B1AAA96 Rear Center Microphone Circuit Component Internal Failure When the power switch is turned on (READY) and the engine speed is 1200 rpm or higher 3 seconds after the power switch is turned on (ACC), the stereo component equalizer assembly detects a malfunction in the No. 3 active noise control microphone for 4 seconds or more continuously*

  • Harness or connector

  • No. 3 active noise control microphone

  • Stereo component equalizer assembly
B1AAB1C Rear Center Microphone Circuit Circuit Voltage Out of Range When the stereo component equalizer assembly detects a No. 3 active noise control microphone connection malfunction for 4 seconds or more continuously 3 seconds after the engine switch is turned on (ACC)*

  • Harness or connector

  • No. 3 active noise control microphone

  • Stereo component equalizer assembly
Tip:

*: Malfunction monitoring is not performed during the following conditions to prevent erroneous detection.


  • The auxiliary battery voltage is less than 9.5 V.

  • Before 3 seconds have elapsed after auxiliary battery voltage has returned to normal.

Table 1. *a No. 3 Active Noise Control Microphone *b Stereo Component Equalizer Assembly
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WIRING DIAGRAM

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PROCEDURE


  1. Click here

    CLEAR DTC


    1. Clear the DTCs.

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      1. Body Electrical > Active Noise Control > Clear DTCs


      Result
      Proceed to
      NEXT

  2. Click here

    CHECK FOR DTC


    1. Check for DTCs.

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      1. Body Electrical > Active Noise Control > Trouble Codes


      OK
      DTC B1AAA96 and B1AAB1C are not output.
      Result
      Proceed to
      OK
      NG

  3. Click here

    CHECK HARNESS AND CONNECTOR (STEREO COMPONENT EQUALIZER ASSEMBLY - NO. 3 ACTIVE NOISE CONTROL MICROPHONE)


    1. Disconnect the L7 stereo component equalizer assembly connector.

    2. Disconnect the N19 No. 3 active noise control microphone connector.

    3. Measure the resistance according to the value(s) in the table below.

      Standard Resistance
      Tester Connection Condition Specified Condition
      L7-5 (MC3+) - N19-1 (MC3+) Always Below 1 Ω
      L7-19 (MC3-) - N19-2 (MC3-) Always Below 1 Ω
      L7-5 (MC3+) - Body ground Always 10 kΩ or higher
      L7-19 (MC3-) - Body ground Always 10 kΩ or higher
      Result
      Proceed to
      OK
      NG

    • OKClick here
    • NG

      REPAIR OR REPLACE HARNESS OR CONNECTOR

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    REPLACE NO. 3 ACTIVE NOISE CONTROL MICROPHONE


    1. Replace the No. 3 active noise control microphone with a new or known good one.

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      Result
      Proceed to
      NEXT

  5. Click here

    CLEAR DTC


    1. Clear the DTCs.

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      1. Body Electrical > Active Noise Control > Clear DTCs


      Result
      Proceed to
      NEXT

  6. Click here

    CHECK FOR DTC


    1. Check for DTCs.

      Click here


      1. Body Electrical > Active Noise Control > Trouble Codes


      OK
      DTC B1AAA96 and B1AAB1C are not output.
      Result
      Proceed to
      OK
      NG

    • OK

      END (NO. 3 ACTIVE NOISE CONTROL MICROPHONE IS DEFECTIVE)

    • NG

      REPLACE STEREO COMPONENT EQUALIZER ASSEMBLYClick here