NAVIGATION SYSTEM, 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. 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

A005HGPE04

PROCEDURE


  1. CHECK HARNESS AND CONNECTOR


    1. Disconnect the F45 and F46 radio and display receiver assembly connectors.

    2. Disconnect the H8 and G8 front No. 1 speaker assembly connectors.

    3. Disconnect the H9 and G9 front No. 2 speaker assembly connectors.

    4. Disconnect the J4 and I4 rear speaker assembly connectors.

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

      Standard Resistance
      Tester Connection Condition Specified Condition
      F45-2 (FL+) - H9-4 (+) Always Below 1 Ω
      F45-6 (FL-) - H9-2 (-) Always Below 1 Ω
      F45-1 (FR+) - G9-4 (+) Always Below 1 Ω
      F45-5 (FR-) - G9-2 (-) Always Below 1 Ω

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

      Standard Resistance
      Tester Connection Condition Specified Condition
      H9-3 (TWL+) - H8-1 Always Below 1 Ω
      H9-1 (TWL-) - H8-2 Always Below 1 Ω
      G9-3 (TWR+) - G8-1 Always Below 1 Ω
      G9-1 (TWR-) - G8-2 Always Below 1 Ω

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

      Standard Resistance
      Tester Connection Condition Specified Condition
      F46-2 (RL+) - J4-1 Always Below 1 Ω
      F46-6 (RL-) - J4-2 Always Below 1 Ω
      F46-1 (RR+) - I4-1 Always Below 1 Ω
      F46-3 (RR-) - I4-2 Always Below 1 Ω

    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
      H8-1 - Body ground Always 10 kΩ or higher
      H8-2 - Body ground Always 10 kΩ or higher
      G8-1 - Body ground Always 10 kΩ or higher
      G8-2 - Body ground Always 10 kΩ or higher
      H9-4 (+) - Body ground Always 10 kΩ or higher
      H9-2 (-) - Body ground Always 10 kΩ or higher
      G9-4 (+) - Body ground Always 10 kΩ or higher
      G9-2 (-) - Body ground Always 10 kΩ or higher
      J4-1 - Body ground Always 10 kΩ or higher
      J4-2 - Body ground Always 10 kΩ or higher
      I4-1 - Body ground Always 10 kΩ or higher
      I4-2 - Body ground Always 10 kΩ or higher

    NG

    REPAIR OR REPLACE HARNESS OR CONNECTOR

    OK

  2. INSPECT FRONT NO. 1 SPEAKER ASSEMBLY

    Inspect the front No. 1 speaker assembly Click here.

    Tech Tips

    The speaker should not be removed to check resistance.


    NG

    REPLACE FRONT NO. 1 SPEAKER ASSEMBLY Click here

    OK

  3. INSPECT FRONT NO. 2 SPEAKER ASSEMBLY


    1. Replace the front No. 2 speaker assembly Click here.

    2. Clear the DTCs Click here.

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

      OK
      No DTCs are output.

      Tech Tips


      • Connect all the connectors to the front No. 2 speakers.

      • If 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.


    OK

    END

    NG

  4. INSPECT REAR SPEAKER ASSEMBLY


    1. Inspect the rear speaker assembly Click here.

      Tech Tips

      The speaker should not be removed to check resistance.


    OK

    REPLACE RADIO AND DISPLAY RECEIVER ASSEMBLY Click here

    NG

    REPLACE REAR SPEAKER ASSEMBLY Click here