AUDIO AND VISUAL SYSTEM (w/o Navigation System), Diagnostic DTC:74-40

DTC Code DTC Name
74-40 Short in Speaker Circuit

DESCRIPTION

DTC Code DTC Detection Condition Trouble Area
74-40 A short is detected in the speaker output circuit.

  • Harness or connector

  • Speakers

  • Stereo component amplifier assembly

WIRING DIAGRAM

A00JVG2E01

INSPECTION PROCEDURE

Tech Tips

After the inspection is completed, clear the DTCs.

PROCEDURE


  1. CHECK FOR DTC


    1. Disconnect the H7 and H12 stereo component amplifier assembly connectors.

    2. Clear the DTC.

    3. Check if DTC 74-40 is output.

      OK
      No DTC is output.

    NG

    REPLACE STEREO COMPONENT AMPLIFIER ASSEMBLY Click here

    OK

  2. CHECK FOR DTC


    1. Reconnect the H12 stereo component amplifier assembly connector.

    2. Check if DTC 74-40 is output.

      OK
      No DTC is output.

    NG

    CHECK HARNESS AND CONNECTOR (STEREO COMPONENT AMPLIFIER - SPEAKERS) Click here

    OK

  3. CHECK HARNESS AND CONNECTOR (STEREO COMPONENT AMPLIFIER - SPEAKER)


    • *1: for RH

    • *2: for LH


    1. Disconnect the H7 stereo component amplifier assembly connector.

    2. Disconnect the H10*1 and/or H13*2 front No. 1 speaker assembly connector.

    3. Disconnect the H21*1 and/or H22*2 front No. 3 speaker assembly connector.

    4. Disconnect the H14 front No. 4 speaker assembly connector.

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

      Standard Resistance
      Tester Connection Condition Specified Condition
      H7-1 (FL+) - H22-1 (TWL+) Always Below 1 Ω
      H7-2 (FR+) - H21-1 (TWR+) Always Below 1 Ω
      H7-5 (FL-) - H22-2 (TWL-) Always Below 1 Ω
      H7-6 (FR-) - H21-2 (TWR-) Always Below 1 Ω
      H7-7 (CTR-) - H14-1 Always Below 1 Ω
      H7-8 (CTR+) - H14-2 Always Below 1 Ω
      H7-1 (FL+) - Body ground Always 10 kΩ or higher
      H7-2 (FR+) - Body ground Always 10 kΩ or higher
      H7-5 (FL-) - Body ground Always 10 kΩ or higher
      H7-6 (FR-) - Body ground Always 10 kΩ or higher
      H7-7 (CTR-) - Body ground Always 10 kΩ or higher
      H7-8 (CTR+) - Body ground Always 10 kΩ or higher

    NG

    REPAIR OR REPLACE HARNESS OR CONNECTOR

    OK

  4. INSPECT FRONT NO. 3 SPEAKER ASSEMBLY RH


    1. A00K18NE03

      Disconnect the H21 front No. 3 speaker assembly RH connector.

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

      Standard Resistance
      Tester Connection Condition Specified Condition
      1 (TWR+) - 3 (+) Always Below 1 Ω
      2 (TWR-) - 4 (-) Always Below 1 Ω

    NG

    REPLACE FRONT NO. 3 SPEAKER ASSEMBLY RH Click here

    OK

  5. INSPECT FRONT NO. 1 SPEAKER ASSEMBLY RH


    1. A00JWC8

      Disconnect the H10 front No. 1 speaker assembly RH connector.

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

      Standard Resistance
      Tester Connection Condition Specified Condition
      1 - 2 Always 4.0 Ω

    NG

    REPLACE FRONT NO. 1 SPEAKER ASSEMBLY RH Click here

    OK

  6. CHECK HARNESS AND CONNECTOR (FRONT NO. 3 SPEAKER RH - FRONT NO. 1 SPEAKER RH)


    1. Disconnect the H21 front No. 3 speaker assembly RH connector.

    2. Disconnect the H10 front No. 1 speaker assembly RH connector.

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

      Standard Resistance
      Tester Connection Condition Specified Condition
      H21-3 (+) - H10-2 Always Below 1 Ω
      H21-4 (-) - H10-1 Always Below 1 Ω
      H21-3 (+) - Body ground Always 10 kΩ or higher
      H21-4 (-) - Body ground Always 10 kΩ or higher

    NG

    REPAIR OR REPLACE HARNESS OR CONNECTOR

    OK

  7. INSPECT FRONT NO. 3 SPEAKER ASSEMBLY RH


    1. Temporarily replace the front No. 3 speaker assembly with a new or normally functioning one Click here.

    2. Check that the speaker sounds normally.

      OK
      Malfunction disappears.

    NG

    INSPECT FRONT NO. 3 SPEAKER ASSEMBLY LH Click here

    OK

    REPLACE FRONT NO. 3 SPEAKER ASSEMBLY RH Click here

  8. INSPECT FRONT NO. 3 SPEAKER ASSEMBLY LH


    1. A00K18NE01

      Disconnect the H22 front No. 3 speaker assembly LH connector.

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

      Standard Resistance
      Tester Connection Condition Specified Condition
      1 (TWL+) - 3 (+) Always Below 1 Ω
      2 (TWL-) - 4 (-) Always Below 1 Ω

    NG

    REPLACE FRONT NO. 3 SPEAKER ASSEMBLY LH Click here

    OK

  9. INSPECT FRONT NO. 1 SPEAKER ASSEMBLY LH


    1. A00JWC8

      Disconnect the H13 front No. 1 speaker assembly LH connector.

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

      Standard Resistance
      Tester Connection Condition Specified Condition
      1 - 2 Always 4.0 Ω

    NG

    REPLACE FRONT NO. 1 SPEAKER ASSEMBLY LH Click here

    OK

  10. CHECK HARNESS AND CONNECTOR (FRONT NO. 3 SPEAKER LH - FRONT NO. 1 SPEAKER LH)


    1. Disconnect the H22 front No. 3 speaker assembly LH connector.

    2. Disconnect the H13 front No. 1 speaker assembly LH connector.

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

      Standard Resistance
      Tester Connection Condition Specified Condition
      H22-3 (+) - H13-2 Always Below 1 Ω
      H22-4 (-) - H13-1 Always Below 1 Ω
      H22-3 (+) - Body ground Always 10 kΩ or higher
      H22-4 (-) - Body ground Always 10 kΩ or higher

    NG

    REPAIR OR REPLACE HARNESS OR CONNECTOR

    OK

  11. INSPECT FRONT NO. 3 SPEAKER ASSEMBLY LH


    1. Temporarily replace the front No. 3 speaker assembly with a new or normally functioning one Click here.

    2. Check that the speaker sounds normally.

      OK
      Malfunction disappears.

    NG

    INSPECT FRONT NO. 4 SPEAKER ASSEMBLY Click here

    OK

    REPLACE FRONT NO. 1 SPEAKER ASSEMBLY LH Click here

  12. INSPECT FRONT NO. 4 SPEAKER ASSEMBLY


    1. A00K0XO

      Disconnect the H14 front No. 4 speaker assembly connector.

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

      Standard Resistance
      Tester Connection Condition Specified Condition
      1 - 2 Always 6.0 Ω

    NG

    REPLACE FRONT NO. 4 SPEAKER ASSEMBLY Click here

    OK

    REPLACE STEREO COMPONENT AMPLIFIER ASSEMBLY Click here

  13. CHECK HARNESS AND CONNECTOR (STEREO COMPONENT AMPLIFIER - SPEAKERS)


    • *1: for RH

    • *2: for LH


    1. Disconnect the H12 stereo component amplifier assembly connector.

    2. Disconnect the J4*1 and/or K3*2 front No. 2 speaker assembly connector.

    3. for 5 Doors:

      Disconnect the L1*1 and/or M1*2 rear No. 1 speaker assembly connector.

    4. for 3 Doors:

      Disconnect the Q32*1 and/or R37*2 rear No. 1 speaker assembly connector.

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

      Standard Resistance
      Tester Connection Condition Specified Condition
      H12-3 (WFL+) - K3-1 Always Below 1 Ω
      H12-4 (RL+) - M1-1 Always Below 1 Ω
      H12-5 (RR+) - L1-1 Always Below 1 Ω
      H12-4 (RL+) - R37-1 Always Below 1 Ω
      H12-5 (RR+) - Q32-1 Always Below 1 Ω
      H12-8 (WFL-) - K3-2 Always Below 1 Ω
      H12-9 (WFR-) - J4-2 Always Below 1 Ω
      H12-10 (WFR+) - J4-1 Always Below 1 Ω
      H12-11 (RL-) - M1-2 Always Below 1 Ω
      H12-12 (RR-) - L1-2 Always Below 1 Ω
      H12-11 (RL-) - R37-2 Always Below 1 Ω
      H12-12 (RR-) - Q32-2 Always Below 1 Ω
      H12-3 (WFL+) - Body ground Always 10 kΩ or higher
      H12-4 (RL+) - Body ground Always 10 kΩ or higher
      H12-5 (RR+) - Body ground Always 10 kΩ or higher
      H12-8 (WFL-) - Body ground Always 10 kΩ or higher
      H12-9 (WFR-) - Body ground Always 10 kΩ or higher
      H12-10 (WFR+) - Body ground Always 10 kΩ or higher
      H12-11 (RL-) - Body ground Always 10 kΩ or higher
      H12-12 (RR-) - Body ground Always 10 kΩ or higher

    NG

    REPAIR OR REPLACE HARNESS OR CONNECTOR

    OK

  14. INSPECT FRONT NO. 2 SPEAKER ASSEMBLY RH


    1. A00K0XO

      Disconnect the J4 front No. 2 speaker assembly RH connector.

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

      Standard Resistance
      Tester Connection Condition Specified Condition
      1 - 2 Always 4.0 Ω

    NG

    REPLACE FRONT NO. 2 SPEAKER ASSEMBLY RH Click here

    OK

  15. INSPECT FRONT NO. 2 SPEAKER ASSEMBLY LH


    1. A00K0XO

      Disconnect the K3 front No. 2 speaker assembly LH connector.

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

      Standard Resistance
      Tester Connection Condition Specified Condition
      1 - 2 Always 4.0 Ω

    NG

    REPLACE FRONT NO. 2 SPEAKER ASSEMBLY LH Click here

    OK

  16. INSPECT REAR NO. 1 SPEAKER ASSEMBLY RH


    1. A00JWC8

      Disconnect the L1*1 or Q32*2 rear No. 1 speaker assembly RH connector.


      • *1: for 5 Door

      • *2: for 3 Door

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

      Standard Resistance
      Tester Connection Condition Specified Condition
      1 - 2 Always 4.0 Ω
      Result
      Result Proceed to
      OK A
      NG (for 5 Door) B
      NG (for 3 Door) C

    B

    REPLACE REAR NO. 1 SPEAKER ASSEMBLY RH Click here

    C

    REPLACE REAR NO. 1 SPEAKER ASSEMBLY RH Click here

    A

  17. INSPECT REAR NO. 1 SPEAKER ASSEMBLY LH


    1. A00JWC8

      Disconnect the M1*1 or R37*2 rear No. 1 speaker assembly LH connector.


      • *1: for 5 Door

      • *2: for 3 Door

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

      Standard Resistance
      Tester Connection Condition Specified Condition
      1 - 2 Always 4.0 Ω
      Result
      Result Proceed to
      OK A
      NG (for 5 Door) B
      NG (for 3 Door) C

    B

    REPLACE REAR NO. 1 SPEAKER ASSEMBLY LH Click here

    C

    REPLACE REAR NO. 1 SPEAKER ASSEMBLY LH Click here

    A

    REPLACE STEREO COMPONENT AMPLIFIER ASSEMBLY Click here