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 Code DTC Detection Condition Trouble Area
B15C3 A short is detected in the speaker output circuit.

  • Harness or connector

  • Speaker

  • Radio and display receiver assembly

WIRING DIAGRAM

A01IQENE06

INSPECTION PROCEDURE

PROCEDURE


  1. CHECK HARNESS AND CONNECTOR


    • *1: for RH Side

    • *2: for LH Side


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

    2. Disconnect the J1*1 and K1*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 (-) Always Below 1 Ω
      H107-2 (FL+) - H42-4 (+) Always Below 1 Ω
      H107-6 (FL-) - H42-2 (-) Always Below 1 Ω

    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+) - J1-1 Always Below 1 Ω
      H41-1 (TWR-) - J1-2 Always Below 1 Ω
      H42-3 (TWL+) - K1-1 Always Below 1 Ω
      H42-1 (TWL-) - K1-2 Always Below 1 Ω

    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 Always Below 1 Ω
      H108-2 (RL+) - M5-1 Always Below 1 Ω
      H108-6 (RL-) - M5-2 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
      J1-1 - Body ground Always 10 kΩ or higher
      J1-2 - Body ground Always 10 kΩ or higher
      K1-1 - Body ground Always 10 kΩ or higher
      K1-2 - Body ground Always 10 kΩ or higher
      H41-4 (+) - Body ground Always 10 kΩ or higher
      H41-2 (-) - Body ground Always 10 kΩ or higher
      H42-4 (+) - Body ground Always 10 kΩ or higher
      H42-2 (-) - Body ground Always 10 kΩ or higher
      L5-1 - Body ground Always 10 kΩ or higher
      L5-2 - Body ground Always 10 kΩ or higher
      M5-1 - Body ground Always 10 kΩ or higher
      M5-2 - Body ground Always 10 kΩ or higher

    NG

    REPAIR OR REPLACE HARNESS OR CONNECTOR

    OK

  2. INSPECT FRONT NO. 1 SPEAKER ASSEMBLY


    1. A01IQO0

      Disconnect the J1*1 and/or K1*2 front No. 1 speaker assembly connector.


      • *1: for RH Side

      • *2: for LH Side

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

      Standard Resistance
      Tester Connection Condition Specified Condition
      1 - 2 Always 4 Ω

    NG

    REPLACE FRONT NO. 1 SPEAKER ASSEMBLY Click here

    OK

  3. INSPECT REAR SPEAKER ASSEMBLY


    1. A01IQO0

      Disconnect the L5*1 and/or M5*2 rear speaker assembly connector.


      • *1: for RH Side

      • *2: for LH Side

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

      Standard Resistance
      Tester Connection Condition Specified Condition
      1 - 2 Always 4 Ω

    NG

    REPLACE REAR SPEAKER ASSEMBLY Click here

    OK

  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. Check that the speaker sounds normally.

      OK
      Malfunction disappears.

    NG

    REPLACE RADIO AND DISPLAY RECEIVER ASSEMBLY Click here

    OK

    END (FRONT NO. 2 SPEAKER ASSEMBLY WAS DEFECTIVE)