NAVIGATION SYSTEM(for Sedan) Speaker Circuit

DTC Code DTC Name
Speaker Circuit

DESCRIPTION

If there is a short in a speaker circuit, the radio and display receiver assembly detects it and stops output to the speakers.

Thus sound cannot be heard from the speakers even if there is no malfunction in the radio and display receiver assembly or speakers.

WIRING DIAGRAM

E226481E31

PROCEDURE

  1. CHECK SPEAKER (OPERATION CHECK)

    1. E268474

      Enter the "System Check Mode" screen. Refer to Check Speaker in Operation Check.

      Click here

    2. Perform the operation check above and determine the speaker that is not operating.

      Result

      Not Operating Speaker

      Proceed to

      Front No. 1 speaker assembly or front No. 2 speaker assembly

      A

      Rear speaker assembly

      B
      Tip:

      If sound cannot be heard from any speaker, inspect all of them.

    B

    CHECK HARNESS AND CONNECTOR (RADIO AND DISPLAY RECEIVER ASSEMBLY - REAR SPEAKER ASSEMBLY)Click here

    A

  2. CHECK HARNESS AND CONNECTOR (RADIO AND DISPLAY RECEIVER ASSEMBLY - FRONT NO. 1 SPEAKER ASSEMBLY - FRONT NO. 2 SPEAKER ASSEMBLY)

    1. Disconnect the E1 radio and display receiver assembly connector.

    2. Disconnect the G1 and H1 front No. 1 speaker assembly connectors.

    3. Disconnect the G4 and H5 front No. 2 speaker assembly connectors.

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

      Standard Resistance

      Tester Connection

      Condition

      Specified Condition

      E1-1 (FR+) - G4-4 (TWR+)

      Always

      Below 1 Ω

      E1-5 (FR-) - G4-2 (TWR-)

      Always

      Below 1 Ω

      E1-2 (FL+) - H5-4 (TWL+)

      Always

      Below 1 Ω

      E1-6 (FL-) - H5-2 (TWL-)

      Always

      Below 1 Ω

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

      Standard Resistance

      Tester Connection

      Condition

      Specified Condition

      G1-1 - G4-3 (+)

      Always

      Below 1 Ω

      G1-2 - G4-1 (-)

      Always

      Below 1 Ω

      H1-1 - H5-3 (+)

      Always

      Below 1 Ω

      H1-2 - H5-1 (-)

      Always

      Below 1 Ω

    6. 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

      E1-1 (FR+) - Body ground

      Always

      10 kΩ or higher

      E1-5 (FR-) - Body ground

      Always

      10 kΩ or higher

      E1-2 (FL+) - Body ground

      Always

      10 kΩ or higher

      E1-6 (FL-) - Body ground

      Always

      10 kΩ or higher

    7. 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

      G4-3 (+) - Body ground

      Always

      10 kΩ or higher

      G4-1 (-) - Body ground

      Always

      10 kΩ or higher

      H5-3 (+) - Body ground

      Always

      10 kΩ or higher

      H5-1 (-) - 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. E226097C11

      *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

      Tester Connection

      Condition

      Specified Condition

      4 (TWR+) - 2 (TWR-)

      Always

      10 kΩ or higher

      3 (+) - 4 (TWR+)

      Always

      Below 1 Ω

      1 (-) - 2 (TWR-)

      Always

      Below 1 Ω

      4 (TWL+) - 2 (TWL-)

      Always

      10 kΩ or higher

      3 (+) - 4 (TWL+)

      Always

      Below 1 Ω

      1 (-) - 2 (TWL-)

      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. Check that the malfunction disappears when a known good speaker is installed.

      Click here

      OK

      Malfunction disappears.

      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 LH and RH sides.

    Result

    Proceed to

    OK

    NG
    OK

    END

    NG

    PROCEED TO NEXT SUSPECTED AREA SHOWN IN PROBLEM SYMPTOMS TABLE

    Click here

  6. CHECK HARNESS AND CONNECTOR (RADIO AND DISPLAY RECEIVER ASSEMBLY - REAR SPEAKER ASSEMBLY)

    1. Disconnect the E2 radio and display receiver assembly connector.

    2. Disconnect the L79 and L80 rear speaker assembly connectors.

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

      Standard Resistance

      Tester Connection

      Condition

      Specified Condition

      E2-1 (RR+) - L79-1

      Always

      Below 1 Ω

      E2-3 (RR-) - L79-2

      Always

      Below 1 Ω

      E2-2 (RL+) - L80-1

      Always

      Below 1 Ω

      E2-6 (RL-) - L80-2

      Always

      Below 1 Ω

    4. 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

      E2-1 (RR+) - Body ground

      Always

      10 kΩ or higher

      E2-3 (RR-) - Body ground

      Always

      10 kΩ or higher

      E2-2 (RL+) - Body ground

      Always

      10 kΩ or higher

      E2-6 (RL-) - Body ground

      Always

      10 kΩ or higher

    Result

    Proceed to

    OK

    NG
    NG

    REPAIR OR REPLACE HARNESS OR CONNECTOR

    OK

  7. INSPECT REAR SPEAKER ASSEMBLY

    1. Remove the rear speaker assembly.

      Click here

    2. E219303C30

      *a

      Component without harness connected

      (Rear 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
    OK

    PROCEED TO NEXT SUSPECTED AREA SHOWN IN PROBLEM SYMPTOMS TABLE

    Click here

    NG

    REPLACE REAR SPEAKER ASSEMBLY

    Click here