AUDIO AND VISUAL SYSTEM > Speaker Circuit

for Preparation Click here


DESCRIPTION

When the radio receiver has a built-in type amplifier, a sound signal is sent from the radio receiver to the speakers via this circuit.

WIRING DIAGRAM


E176034E01


INSPECTION PROCEDURE

1.CHECK SPEAKERS

  1. Check if sound is emitted from each speaker.
    Result 
    Result
    		Proceed to
    Front No. 1 speakers or front No. 2 speakers have problems
    		A
    Rear speakers have problems
    		B



B
Go to step 6
A


2.INSPECT FRONT NO. 2 SPEAKER ASSEMBLY


    E176035E01

  1. Disconnect the E7 or F7 front No. 2 speaker assembly connector.

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

    Standard Resistance::
    for RH Side 
    Tester Connection
    		Condition
    		Specified Condition
    E7-1 (TWR-) - E7-3 (TWR+)
    		Always
    		Approximately 4 Ω
    E7-3 (TWR+) - E7-4 (+)
    		Always
    		Below 1 Ω
    E7-1 (TWR-) - E7-2 (-)
    for LH Side 
    Tester Connection
    		Condition
    		Specified Condition
    F7-1 (TWL-) - F7-3 (TWL+)
    		Always
    		Approximately 4 Ω
    F7-3 (TWL+) - F7-4 (+)
    		Always
    		Below 1 Ω
    F7-1 (TWL-) - F7-2 (-)

    Text in Illustration 
    *1
    		Component without harness connected
    (Front No. 2 Speaker Assembly)
    *2
    		for RH Side
    *3
    		for LH Side

  1. Reconnect the front No. 2 speaker assembly connector.



NG
REPLACE FRONT NO. 2 SPEAKER ASSEMBLY (Click here)
OK


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


    E176036E01

  1. Disconnect the D61 radio receiver assembly connector.

  1. Disconnect the E7 or F7 front No. 2 speaker assembly connector.

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

    Standard Resistance::
    for RH Side 
    Tester Connection
    		Condition
    		Specified Condition
    D61-1 (FR+) - E7-3 (TWR+)
    		Always
    		Below 1 Ω
    D61-5 (FR-) - E7-1 (TWR-)
    		Always
    		Below 1 Ω
    D61-1 (FR+) - Body ground
    		Always
    		10 kΩ or higher
    D61-5 (FR-) - Body ground
    		Always
    		10 kΩ or higher
    for LH Side 
    Tester Connection
    		Condition
    		Specified Condition
    D61-2 (FL+) - F7-3 (TWL+)
    		Always
    		Below 1 Ω
    D61-6 (FL-) - F7-1 (TWL-)
    		Always
    		Below 1 Ω
    D61-2 (FL+) - Body ground
    		Always
    		10 kΩ or higher
    D61-6 (FL-) - Body ground
    		Always
    		10 kΩ or higher

    Text in Illustration 
    *1
    		Front view of wire harness connector
    (Radio Receiver Assembly)
    *2
    		Front view of wire harness connector
    (to Front No. 2 Speaker Assembly)
    *3
    		for RH Side
    *4
    		for LH Side

  1. Reconnect the radio receiver assembly connector.

  1. Reconnect the front No. 2 speaker assembly connector.



NG
REPAIR OR REPLACE HARNESS OR CONNECTOR
OK


4.INSPECT FRONT NO. 1 SPEAKER ASSEMBLY


    E176037E01

  1. Disconnect the E6 or F6 front No. 1 speaker assembly connector.

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

    Standard Resistance::
    for RH Side 
    Tester Connection
    		Condition
    		Specified Condition
    E6-1 - E6-2
    		Always
    		Approximately 4 Ω
    for LH Side 
    Tester Connection
    		Condition
    		Specified Condition
    F6-1 - F6-2
    		Always
    		Approximately 4 Ω

    Text in Illustration 
    *1
    		Component without harness connected
    (Front No. 1 Speaker Assembly)
    *2
    		for RH Side
    *3
    		for LH Side

  1. Reconnect the front No. 1 speaker assembly connector.



NG
REPLACE FRONT NO. 1 SPEAKER ASSEMBLY (Click here)
OK


5.CHECK HARNESS AND CONNECTOR (FRONT NO. 1 SPEAKER ASSEMBLY - FRONT NO. 2 SPEAKER ASSEMBLY)


    E176038E01

  1. Disconnect the E6 or F6 front No. 1 speaker assembly connector.

  1. Disconnect the E7 or F7 front No. 2 speaker assembly connector.

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

    Standard Resistance::
    for RH Side 
    Tester Connection
    		Condition
    		Specified Condition
    E6-1 - E7-4 (+)
    		Always
    		Below 1 Ω
    E6-2 - E7-2 (-)
    E6-1 - Body ground
    		Always
    		10 kΩ or higher
    E6-2 - Body ground
    for LH Side 
    Tester Connection
    		Condition
    		Specified Condition
    F6-1 - F7-4 (+)
    		Always
    		Below 1 Ω
    F6-2 - F7-2 (-)
    F6-1 - Body ground
    		Always
    		10 kΩ or higher
    F6-2 - Body ground

    Text in Illustration 
    *1
    		Front view of wire harness connector
    (to Front No. 1 Speaker Assembly)
    *2
    		Front view of wire harness connector
    (to Front No. 2 Speaker Assembly)
    *3
    		for RH Side
    *4
    		for LH Side

  1. Reconnect the front No. 1 speaker assembly connector.

  1. Reconnect the front No. 2 speaker assembly connector.



NG
REPAIR OR REPLACE HARNESS OR CONNECTOR
OK

PROCEED TO NEXT SUSPECTED AREA SHOWN IN PROBLEM SYMPTOMS TABLE (Click here)  

6.INSPECT REAR SPEAKER ASSEMBLY


    E176037E02

  1. Disconnect the G28 or G29 rear speaker assembly connector.

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

    Standard Resistance::
    for RH Side 
    Tester Connection
    		Condition
    		Specified Condition
    G28-1 - G28-2
    		Always
    		Approximately 4 Ω
    for LH Side 
    Tester Connection
    		Condition
    		Specified Condition
    G29-1 - G29-2
    		Always
    		Approximately 4 Ω

    Text in Illustration 
    *1
    		Component without harness connected
    (Rear Speaker Assembly)
    *2
    		for RH Side
    *3
    		for LH Side

  1. Reconnect the rear speaker assembly connector.



NG
REPLACE REAR SPEAKER ASSEMBLY (Click here)
OK


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


    E176039E01

  1. Disconnect the D62 radio receiver assembly connector.

  1. Disconnect the G28 or G29 rear speaker assembly connector.

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

    Standard Resistance::
    for RH Side 
    Tester Connection
    		Condition
    		Specified Condition
    D62-1 (RR+) - G28-1
    		Always
    		Below 1 Ω
    D62-3 (RR-) - G28-2
    D62-1 (RR+) - Body ground
    		Always
    		10 kΩ or higher
    D62-3 (RR-) - Body ground
    for LH Side 
    Tester Connection
    		Condition
    		Specified Condition
    D62-2 (RL+) - G29-1
    		Always
    		Below 1 Ω
    D62-6 (RL-) - G29-2
    D62-2 (RL+) - Body ground
    		Always
    		10 kΩ or higher
    D62-6 (RL-) - Body ground

    Text in Illustration 
    *1
    		Front view of wire harness connector
    (to Radio Receiver Assembly)
    *2
    		Front view of wire harness connector
    (to Rear Speaker Assembly)
    *3
    		for RH Side
    *4
    		for LH Side

  1. Reconnect the radio receiver assembly connector.

  1. Reconnect the rear speaker assembly connector.



NG
REPAIR OR REPLACE HARNESS OR CONNECTOR
OK

PROCEED TO NEXT SUSPECTED AREA SHOWN IN PROBLEM SYMPTOMS TABLE (Click here)