AUDIO AND VISUAL SYSTEM(for Radio and Display Type), Diagnostic DTC:B15C3

DTC Code DTC Name
B15C3 Speaker Output Short

DESCRIPTION

This DTC is stored when a malfunction occurs in the speakers.

DTC No.

Detection Item

DTC Detection Condition

Trouble Area

B15C3

Speaker Output Short

A short is detected in the speaker output circuit

  • Harness or connector

  • Speaker

  • Radio and display receiver assembly

WIRING DIAGRAM

E287049E02

PROCEDURE

  1. CHECK HARNESS AND CONNECTOR (RADIO AND DISPLAY RECEIVER ASSEMBLY - BODY GROUND)

    1. Disconnect the E31 radio and display receiver assembly connector.

    2. Disconnect the E1 and E44 front No. 2 speaker assembly connectors.

    3. Measure the resistance between the radio and display receiver assembly and body ground to check for a short circuit in the wire harness.

      Standard Resistance

      Tester Connection

      Condition

      Specified Condition

      E31-1 (FR+) - Body ground

      Always

      10 kΩ or higher

      E31-5 (FR-) - Body ground

      Always

      10 kΩ or higher

      E31-2 (FL+) - Body ground

      Always

      10 kΩ or higher

      E31-6 (FL-) - Body ground

      Always

      10 kΩ or higher

    Result

    Proceed to

    OK

    NG
    NG

    REPAIR OR REPLACE HARNESS OR CONNECTOR

    OK

  2. CHECK HARNESS AND CONNECTOR (FRONT NO. 2 SPEAKER ASSEMBLY - BODY GROUND)

    1. Disconnect the G3 and H3 front No. 1 speaker assembly connectors.

    2. Disconnect the E1 and E44 front No. 2 speaker assembly connectors.

    3. Measure the resistance between each of the front No. 2 speaker assemblies and body ground to check for a short circuit in the wire harness.

      Standard Resistance

      Tester Connection

      Condition

      Specified Condition

      E1-3 (TWR+) - Body ground

      Always

      10 kΩ or higher

      E1-1 (TWR-) - Body ground

      Always

      10 kΩ or higher

      E44-3 (TWL+) - Body ground

      Always

      10 kΩ or higher

      E44-1 (TWL-) - Body ground

      Always

      10 kΩ or higher

    Result

    Proceed to

    OK

    NG
    NG

    REPAIR OR REPLACE HARNESS OR CONNECTOR

    OK

  3. INSPECT FRONT NO. 1 SPEAKER ASSEMBLY

    1. Remove the front No. 1 speaker assembly.

      Click here

    2. E219303C30

      *a

      Component without harness connected

      (Front No. 1 Speaker Assembly)

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

      Standard Resistance

      Tester Connection

      Condition

      Specified Condition

      1 - 2

      Always

      3.2 to 4.8 Ω

    Result

    Proceed to

    OK

    NG
    NG

    REPLACE FRONT NO. 1 SPEAKER ASSEMBLY

    Click here

    OK

  4. INSPECT FRONT NO. 2 SPEAKER ASSEMBLY

    1. Remove the front No. 2 speaker assembly.

      Click here

    2. E226097C39

      *A

      for RH

      *B

      for LH

      *a

      Component without harness connected

      (Front No. 2 Speaker Assembly)

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

      Standard Resistance (for RH)

      Tester Connection

      Condition

      Specified Condition

      4 (+) - 2 (-)

      Always

      10 kΩ or higher

      3 (TWR+) - 4 (+)

      Always

      Below 1 Ω

      1 (TWR-) - 2 (-)

      Always

      Below 1 Ω

      Standard Resistance (for LH)

      Tester Connection

      Condition

      Specified Condition

      4 (+) - 2 (-)

      Always

      10 kΩ or higher

      3 (TWL+) - 4 (+)

      Always

      Below 1 Ω

      1 (TWL-) - 2 (-)

      Always

      Below 1 Ω

    Result

    Proceed to

    OK

    NG
    NG

    REPLACE FRONT NO. 2 SPEAKER ASSEMBLY

    Click here

    OK

  5. REPLACE FRONT NO. 2 SPEAKER ASSEMBLY

    1. Replace the front No. 2 speaker assembly with a new or known good one.

      Click here

    2. Clear the DTCs.

      Click here

      Body Electrical > Navigation System > Clear DTCs

    3. Recheck for DTCs and check that no DTCs are output.

      Body Electrical > Navigation System > Trouble Codes

      OK

      No DTCs are output.

      Tip:

      • Connect all the connectors to the front No. 2 speaker assemblies that were disconnected.

      • When there is a possibility that either the right or left front No. 2 speaker assembly is defective, inspect by interchanging the right one with the left one.

      • Perform the above inspection on both the LH and RH side.

    Result

    Proceed to

    OK

    NG
    OK

    END

    NG

    REPLACE RADIO AND DISPLAY RECEIVER ASSEMBLY

    Click here