AUDIO AND VISUAL SYSTEM > Speaker Circuit

for Preparation Click here


DESCRIPTION

The stereo component amplifier sends sound signals to the speaker.

WIRING DIAGRAM


E108020E02


E108021E02


E108022E02


INSPECTION PROCEDURE

1.CHECK STEREO COMPONENT AMPLIFIER

  1. Check stereo component amplifier model.

    Result:
    Model
    		Proceed to
    Standard model
    		A
    Mark Levinson model
    		B



B
Go to step 11
A


2.CHECK SPEAKER

  1. Check the malfunctioning speakers.

    Result:
    Result
    		Proceed to
    Speaker (Center)
    		A
    Tweeter
    		B
    Speaker (Door)
    		C
    Speaker (Woofer)
    		D



B
Go to step 5

C
Go to step 7

D
Go to step 9
A


3.INSPECT SPEAKER (CENTER)


    B030881

  1. Disconnect the M2 speaker (center) connector.

  1. Measure the resistance of the connector.

    Standard resistance:
    Tester Connection
    		Specified Condition
    1 - 2
    		Approx. 10 Ω



NG
REPLACE SPEAKER (CENTER)
OK


4.CHECK WIRE HARNESS (STEREO COMPONENT AMPLIFIER - SPEAKER (CENTER))


    E108120E03

  1. Disconnect the M2 speaker (center) connector.

  1. Disconnect the V31 stereo component amplifier connector.

  1. Measure the resistance of the wire harness side connectors.

    Standard resistance:
    Tester Connection
    		Specified Condition
    V31-3 (CTR+) - M2-1
    		Below 1 Ω
    V31-12 (CTR-) - M2-2
    		Below 1 Ω
    V31-3 (CTR+) - Body ground
    		10 kΩ or higher
    V31-12 (CTR-) - Body ground
    		10 kΩ or higher



NG
REPAIR OR REPLACE HARNESS AND CONNECTOR
OK

REPLACE STEREO COMPONENT AMPLIFIER 

5.INSPECT TWEETER


    B031132

  1. Disconnect the L23, L62, U4 and T4 tweeter connectors.

  1. Measure the resistance of the connector.

    Standard resistance:
    Tester Connection
    		Specified Condition
    1 - 2
    		Approx. 4 Ω



NG
REPLACE TWEETER
OK


6.CHECK WIRE HARNESS (STEREO COMPONENT AMPLIFIER - TWEETER)


    E108121E02

  1. Disconnect the V31 stereo component amplifier connector.

  1. Disconnect the L23, L62, U4 and T4 tweeter connectors.

  1. Measure the resistance of the wire harness side connectors.

    Standard resistance:
    Tester Connection
    		Specified Condition
    V31-8 (FL+) - L23-1
    		Below 1 Ω
    V31-19 (FL-) - L23-2
    		Below 1 Ω
    V31-9 (FR+) - L62-1
    		Below 1 Ω
    V31-20 (FR-) - L62-2
    		Below 1 Ω
    V31-6 (RL+) - U4-1
    		Below 1 Ω
    V31-17 (RL-) - U4-2
    		Below 1 Ω
    V31-7 (RR+) - T4-1
    		Below 1 Ω
    V31-18 (RR-) - T4-2
    		Below 1 Ω
    V31-8 (FL+) - Body ground
    		10 kΩ or higher
    V31-19 (FL-) - Body ground
    		10 kΩ or higher
    V31-9 (FR+) - Body ground
    		10 kΩ or higher
    V31-20 (FR-) - Body ground
    		10 kΩ or higher
    V31-6 (RL+) - Body ground
    		10 kΩ or higher
    V31-17 (RL-) - Body ground
    		10 kΩ or higher
    V31-7 (RR+) - Body ground
    		10 kΩ or higher
    V31-18 (RR-) - Body ground
    		10 kΩ or higher



NG
REPAIR OR REPLACE HARNESS AND CONNECTOR
OK

REPLACE STEREO COMPONENT AMPLIFIER 

7.INSPECT SPEAKER (DOOR)


    E110243

  1. Disconnect the O1, N1, Q1 and P1 speaker (door) connectors.

  1. Measure the resistance of the connector.

    Standard resistance:
    Tester Connection
    		Specified Condition
    1 - 2
    		Approx. 4 Ω



NG
REPLACE SPEAKER (DOOR)
OK


8.CHECK WIRE HARNESS (TWEETER - SPEAKER DOOR)


    E108122E02

  1. Disconnect the L23, L62, U4 and T4 tweeter connectors.

  1. Disconnect the O1, N1, Q1 and P1 speaker (door) connectors.

  1. Measure the resistance of the wire harness side connectors.

    Standard resistance:
    Tester Connection
    		Specified Condition
    L23-3 - O1-1
    		Below 1 Ω
    L23-4 - O1-2
    		Below 1 Ω
    L62-3 - N1-1
    		Below 1 Ω
    L62-4 - N1-2
    		Below 1 Ω
    U4-3 - P1-1
    		Below 1 Ω
    U4-4 - P1-2
    		Below 1 Ω
    T4-3 - Q1-1
    		Below 1 Ω
    T4-4 - Q1-2
    		Below 1 Ω



NG
REPAIR OR REPLACE HARNESS AND CONNECTOR
OK

REPLACE TWEETER 

9.INSPECT SPEAKER (WOOFER)


    E072213

  1. Disconnect the V21 speaker (woofer) connector.

  1. Measure the resistance of the connector.

    Standard resistance:
    Tester Connection
    		Specified Condition
    1 - 2
    		Approx. 2.5 Ω
    3 - 4



NG
REPLACE SPEAKER (WOOFER)
OK


10.CHECK WIRE HARNESS (STEREO COMPONENT AMPLIFIER - SPEAKER WOOFER)


    E108123E02

  1. Disconnect the V31 stereo component amplifier connector.

  1. Disconnect the V21 speaker (woofer) connector.

  1. Measure the resistance of the wire harness side connectors.

    Standard resistance:
    Tester Connection
    		Specified Condition
    V31-5 (WF1+) - V21-4
    		Below 1 Ω
    V31-14 (WF1-) - V21-3
    		Below 1 Ω
    V31-4 (WF2+) - V21-2
    		Below 1 Ω
    V31-13 (WF2-) - V21-1
    		Below 1 Ω
    V31-5 (WF1+) - Body ground
    		10 kΩ or higher
    V31-14 (WF1-) - Body ground
    		10 kΩ or higher
    V31-4 (WF2+) - Body ground
    		10 kΩ or higher
    V31-13 (WF2-) - Body ground
    		10 kΩ or higher



NG
REPAIR OR REPLACE HARNESS AND CONNECTOR
OK

REPLACE STEREO COMPONENT AMPLIFIER 

11.CHECK SPEAKER

  1. Check the malfunctioning speakers.

    Result:
    Result
    		Proceed to
    Malfunction condition from the front speaker
    		A
    Malfunction condition from the rear speaker
    		B



B
Go to step 19
A


12.CHECK SPEAKER

  1. Check the malfunctioning speakers.

    Result:
    Result
    		Proceed to
    Speaker (Center)
    		A
    Tweeter and squawker
    		B
    Speaker (Front door)
    		C



B
Go to step 15

C
Go to step 17
A


13.INSPECT SPEAKER (CENTER)


    B030881

  1. Disconnect the M2 speaker (center) connector.

  1. Measure the resistance of the connector.

    Standard resistance:
    Tester Connection
    		Specified Condition
    1 - 2
    		Approx. 8 Ω



NG
REPLACE SPEAKER (CENTER)
OK


14.CHECK WIRE HARNESS (STEREO COMPONENT AMPLIFIER - SPEAKER (CENTER))


    E108281E02

  1. Disconnect the M2 speaker (center) connector.

  1. Disconnect the V31 stereo component amplifier connector.

  1. Measure the resistance of the wire harness side connectors.

    Standard resistance:
    Tester Connection
    		Specified Condition
    V31-3 (CTR+) - M2-1
    		Below 1 Ω
    V31-12 (CTR-) - M2-2
    		Below 1 Ω
    V31-3 (CTR+) - Body ground
    		10 kΩ or higher
    V31-12 (CTR-) - Body ground
    		10 kΩ or higher



NG
REPAIR OR REPLACE HARNESS AND CONNECTOR
OK

REPLACE STEREO COMPONENT AMPLIFIER 

15.INSPECT SQUAWKER AND TWEETER


    B031132

  1. Disconnect the L23 and L62 squawker and tweeter connectors.

  1. Measure the resistance of the connector.

    Standard resistance:
    Tester Connection
    		Specified Condition
    1 - 2
    		Approx. 7 Ω



NG
REPLACE SQUAWKER AND TWEETER
OK


16.CHECK WIRE HARNESS (STEREO COMPONENT AMPLIFIER - SQUAWKER AND TWEETER)


    E108282E02

  1. Disconnect the V31 stereo component amplifier connector.

  1. Disconnect the L23 and L62 squawker and tweeter connectors.

  1. Measure the resistance of the wire harness side connectors.

    Standard resistance:
    Tester Connection
    		Specified Condition
    V31-8 (FL+) - L23-1
    		Below 1 Ω
    V31-19 (FL-) - L23-2
    		Below 1 Ω
    V31-9 (FR+) - L62-1
    		Below 1 Ω
    V31-20 (FR-) - L62-2
    		Below 1 Ω
    V31-8 (FL+) - Body ground
    		10 kΩ or higher
    V31-19 (FL-) - Body ground
    		10 kΩ or higher
    V31-9 (FR+) - Body ground
    		10 kΩ or higher
    V31-20 (FR-) - Body ground
    		10 kΩ or higher



NG
REPAIR OR REPLACE HARNESS AND CONNECTOR
OK

REPLACE STEREO COMPONENT AMPLIFIER 

17.INSPECT SPEAKER (FRONT DOOR)


    E110243

  1. Disconnect the O2 and N2 speaker (front door) connectors.

  1. Measure the resistance of the connector.

    Standard resistance:
    Tester Connection
    		Specified Condition
    1 - 2
    		Approx. 8 Ω



NG
REPLACE SPEAKER (FRONT DOOR)
OK


18.CHECK WIRE HARNESS (STEREO COMPONENT AMPLIFIER - SPEAKER (FRONT DOOR))


    E108283E02

  1. Disconnect the V30 stereo component amplifier connector.

  1. Disconnect the O2 and N2 speaker (front door) connectors.

  1. Measure the resistance of the wire harness side connectors.

    Standard resistance:
    Tester Connection
    		Specified Condition
    V30-3 (WFL+) - O2-1
    		Below 1 Ω
    V30-9 (WFL1-) - O2-2
    		Below 1 Ω
    V30-4 (WFR+) - N2-1
    		Below 1 Ω
    V30-10 (WFR-) - N2-2
    		Below 1 Ω
    V30-3 (WFL+) - Body ground
    		10 kΩ or higher
    V30-9 (WFL-) - Body ground
    		10 kΩ or higher
    V30-4 (WFR+) - Body ground
    		10 kΩ or higher
    V30-10 (WFR-) - Body ground
    		10 kΩ or higher



NG
REPAIR OR REPLACE HARNESS AND CONNECTOR
OK

REPLACE STEREO COMPONENT AMPLIFIER 

19.CHECK SPEAKER

  1. Check the malfunctioning speakers.

    Result:
    Result
    		Proceed to
    Tweeter (Rear)
    		A
    Speaker (Rear door)
    		B
    Speaker (Rear)
    		C
    Speaker (Woofer)
    		D



B
Go to step 22

C
Go to step 24

D
Go to step 26
A


20.INSPECT TWEETER (REAR)


    B031132

  1. Disconnect the U4 and T4 tweeter (rear) connectors.

  1. Measure the resistance of the connector.

    Standard resistance:
    Tester Connection
    		Specified Condition
    1 - 2
    		Approx. 8 Ω



NG
REPLACE TWEETER (REAR)
OK


21.CHECK WIRE HARNESS (STEREO COMPONENT AMPLIFIER - TWEETER (REAR))


    E108284E02

  1. Disconnect the V31 stereo component amplifier connector.

  1. Disconnect the U4 and T4 tweeter (rear) connectors.

  1. Measure the resistance of the wire harness side connectors.

    Standard resistance:
    Tester Connection
    		Specified Condition
    V31-6 (RL+) - U4-1
    		Below 1 Ω
    V31-17 (RL-) - U4-2
    		Below 1 Ω
    V31-7 (RR+) - T4-1
    		Below 1 Ω
    V31-18 (RR-) - T4-2
    		Below 1 Ω
    V31-6 (RL+) - Body ground
    		10 kΩ or higher
    V31-17 (RL-) - Body ground
    		10 kΩ or higher
    V31-7 (RR+) - Body ground
    		10 kΩ or higher
    V31-18 (RR-) - Body ground
    		10 kΩ or higher



NG
REPAIR OR REPLACE HARNESS AND CONNECTOR
OK

REPLACE STEREO COMPONENT AMPLIFIER 

22.INSPECT SPEAKER (REAR DOOR)


    E110243

  1. Disconnect the P1 and Q1 speaker (rear door) connectors.

  1. Measure the resistance of the connector.

    Standard resistance:
    Tester Connection
    		Specified Condition
    1 - 2
    		Approx. 8 Ω



NG
REPLACE SPEAKER (REAR DOOR)
OK


23.CHECK WIRE HARNESS (TWEETER (REAR) - SPEAKER (REAR DOOR))


    E108285E02

  1. Disconnect the Q1 and P1 speaker (rear door) connectors.

  1. Disconnect the U4 and T4 tweeter (rear) connectors.

  1. Measure the resistance of the wire harness side connectors.

    Standard resistance:
    Tester Connection
    		Specified Condition
    U4-3 - Q1-1
    		Below 1 Ω
    U4-4 - Q1-2
    		Below 1 Ω
    T4-3 - P1-1
    		Below 1 Ω
    T4-4 - P1-2
    		Below 1 Ω



NG
REPAIR OR REPLACE HARNESS AND CONNECTOR
OK

REPLACE TWEETER (REAR) 

24.INSPECT SPEAKER (REAR)


    B030881

  1. Disconnect the W21 and V17 speaker (rear) connectors.

  1. Measure the resistance of the connector.

    Standard resistance:
    Tester Connection
    		Specified Condition
    1 - 2
    		Approx. 8 Ω



NG
REPLACE SPEAKER (REAR)
OK


25.CHECK WIRE HARNESS (STEREO COMPONENT AMPLIFIER - SPEAKER (REAR))


    E108286E02

  1. Disconnect the V30 stereo component amplifier connector.

  1. Disconnect the W20 and V17 speaker (rear) connectors.

  1. Measure the resistance of the wire harness side connectors.

    Standard resistance:
    Tester Connection
    		Specified Condition
    V30-1 (SL+) - W20-1
    		Below 1 Ω
    V30-5 (SL-) - W20-2
    		Below 1 Ω
    V30-2 (SR+) - V17-1
    		Below 1 Ω
    V30-6 (SR-) - V17-2
    		Below 1 Ω
    V30-1 (SL+) - Body ground
    		10 kΩ or higher
    V30-5 (SL-) - Body ground
    		10 kΩ or higher
    V30-2 (SR+) - Body ground
    		10 kΩ or higher
    V30-6 (SR-) - Body ground
    		10 kΩ or higher



NG
REPAIR OR REPLACE HARNESS AND CONNECTOR
OK

REPLACE STEREO COMPONENT AMPLIFIER 

26.INSPECT SPEAKER (WOOFER)


    E072213

  1. Disconnect the V21 speaker (woofer) connector.

  1. Measure the resistance of the connector.

    Standard resistance:
    Tester Connection
    		Specified Condition
    1 - 2
    		Approx. 14 Ω
    3 - 4
    		Approx. 14 Ω



NG
REPLACE SPEAKER (WOOFER)
OK


27.CHECK WIRE HARNESS (STEREO COMPONENT AMPLIFIER - SPEAKER WOOFER)


    E108287E02

  1. Disconnect the V31 stereo component amplifier connector.

  1. Disconnect the V21 speaker (woofer) connector.

  1. Measure the resistance of the wire harness side connectors.

    Standard resistance:
    Tester Connection
    		Specified Condition
    V31-5 (WF1+) - V21-4
    		Below 1 Ω
    V31-14 (WF1-) - V21-3
    		Below 1 Ω
    V31-4 (WF2+) - V21-2
    		Below 1 Ω
    V31-13 (WF2-) - V21-1
    		Below 1 Ω
    V31-5 (WF1+) - Body ground
    		10 kΩ or higher
    V31-14 (WF1-) - Body ground
    		10 kΩ or higher
    V31-4 (WF2+) - Body ground
    		10 kΩ or higher
    V31-13 (WF2-) - Body ground
    		10 kΩ or higher



NG
REPAIR OR REPLACE HARNESS AND CONNECTOR
OK

REPLACE STEREO COMPONENT AMPLIFIER