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 Code

DTC Detection Condition

Trouble Area

B15C3

A short is detected in the speaker output circuit.

  • Harness or connector

  • Speakers

  • Radio and display receiver assembly

WIRING DIAGRAM

E236927E19

PROCEDURE

  1. CHECK HARNESS AND CONNECTOR (SPEAKER CIRCUIT)

    • *1: for RH Side

    • *2: for LH Side

    1. Disconnect the H107 and H108 radio and display receiver assembly connectors.

    2. Disconnect the J12*1 and K12*2 front No. 1 speaker assembly connectors.

    3. Disconnect the H41*1 and H42*2 front No. 2 speaker assembly connectors.

    4. Disconnect the L5*1 and M5*2 rear speaker assembly connectors.

    5. Measure the resistance between each of the radio and display receiver assembly and the front No. 2 speaker assembly to check for an open circuit in the wire harness.

      Standard Resistance

      Tester Connection

      Condition

      Specified Condition

      H107-1 (FR+) - H41-4 (+)

      Always

      Below 1 Ω

      H107-5 (FR-) - H41-2 (-)

      H107-2 (FL+) - H42-4 (+)

      H107-6 (FL-) - H42-2 (-)

    6. Measure the resistance between each of the front No. 2 speaker assembly and front No. 1 speaker assembly to check for an open circuit in the wire harness.

      Standard Resistance

      Tester Connection

      Condition

      Specified Condition

      H41-3 (TWR+) - J12-1

      Always

      Below 1 Ω

      H41-1 (TWR-) - J12-2

      H42-3 (TWL+) - K12-1

      H42-1 (TWL-) - K12-2

    7. Measure the resistance between each of the radio and display receiver assembly and the rear speaker assembly to check for an open circuit in the wire harness.

      Standard Resistance

      Tester Connection

      Condition

      Specified Condition

      H108-1 (RR+) - L5-1

      Always

      Below 1 Ω

      H108-3 (RR-) - L5-2

      H108-2 (RL+) - M5-1

      H108-6 (RL-) - M5-2

    8. Measure the resistance between each speaker assembly and body ground to check for a short circuit in the wire harness.

      Standard Resistance

      Tester Connection

      Condition

      Specified Condition

      J12-1 - Body ground

      Always

      10 kΩ or higher

      J12-2 - Body ground

      K12-1 - Body ground

      K12-2 - Body ground

      H41-4 (+) - Body ground

      H41-2 (-) - Body ground

      H42-4 (+) - Body ground

      H42-2 (-) - Body ground

      L5-1 - Body ground

      L5-2 - Body ground

      M5-1 - Body ground

      M5-2 - Body ground

    REPAIR OR REPLACE HARNESS OR CONNECTOR

  2. INSPECT FRONT NO. 1 SPEAKER ASSEMBLY

    1. Remove the front No. 1 speaker assembly (Click here).

    2. Inspect the front No. 1 speaker assembly (Click here).

    REPLACE FRONT NO. 1 SPEAKER ASSEMBLY

    (Click here)

  3. INSPECT REAR SPEAKER ASSEMBLY

    1. Remove the rear speaker assembly (Click here).

    2. Inspect the rear speaker assembly (Click here).

    REPLACE REAR SPEAKER ASSEMBLY

    (Click here)

  4. REPLACE FRONT NO. 2 SPEAKER ASSEMBLY

    1. Temporarily replace the front No. 2 speaker assembly with a new or normally functioning one (Click here).

    2. Clear the DTCs (Click here).

    3. Check for DTCs (Click here).

      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 speaker is defective, inspect by interchanging the right one with the left one.

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

    END (FRONT NO. 2 SPEAKER ASSEMBLY IS DEFECTIVE)

    REPLACE RADIO AND DISPLAY RECEIVER ASSEMBLY

    (Click here)