NAVIGATION SYSTEM > Navigation Voice Speaker Circuit

for Preparation Click here


DESCRIPTION

This circuit is used when the voice guidance in the navigation system is on.

WIRING DIAGRAM


E111735E02


INSPECTION PROCEDURE

1.CHECK HARNESS AND CONNECTOR (NAVIGATION ECU - FRONT STEREO COMPONENT SPEAKER)


    E111821E02

  1. Disconnect the navigation ECU connector N4 and front stereo component speaker connector T11 or T10.

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

    Resistance:
    Tester connection
    		Condition
    		Specified condition
    TWL+ - AUO+ (*1)
    		Always
    		Below 1 Ω
    TWL- - AUO- (*1)
    		Always
    		Below 1 Ω
    TWR+ - AUO+ (*2)
    		Always
    		Below 1 Ω
    TWR- - AUO- (*2)
    		Always
    		Below 1 Ω
    AUO+ - Body ground
    		Always
    		10 kΩ or higher
    AUO- - Body ground
    		Always
    		10 kΩ or higher

    *1: LHD
    *2: RHD



NG
REPAIR OR REPLACE HARNESS OR CONNECTOR
OK


2.INSPECT FRONT STEREO COMPONENT SPEAKER

  1. Check that the malfunction disappears when another speaker in good condition is installed.

    OK:
    Malfunction disappears.

    HINT:
    1. Connect all the connectors to the speakers.
    2. When there is a possibility that either the right or left front speaker is defective, inspect by interchanging the right one with the left one.



OK
REPLACE FRONT STEREO COMPONENT SPEAKER
NG


3.CHECK HARNESS AND CONNECTOR (FRONT NO.2 SPEAKER - FRONT STEREO COMPONENT SPEAKER)


    E111759E02

  1. Disconnect the connectors from the front No.2 speaker and front stereo component speaker.

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

    Resistance:
    Tester connection
    		Condition
    		Specified condition
    T11-1 - F14-2 (*2)
    		Always
    		Below 1 Ω
    T11-3 - F14-1 (*2)
    		Always
    		Below 1 Ω
    T11-1 - Body ground (*2)
    		Always
    		10 kΩ or higher
    T11-3 - Body ground (*2)
    		Always
    		10 kΩ or higher
    T10-1 - F13-2 (*1)
    		Always
    		Below 1 Ω
    T10-3 - F13-2 (*1)
    		Always
    		Below 1 Ω
    T10-1 - Body ground (*1)
    		Always
    		10 kΩ or higher
    T10-3 - Body ground (*1)
    		Always
    		10 kΩ or higher

    *1: LHD
    *2: RHD



NG
REPAIR OR REPLACE HARNESS OR CONNECTOR
OK


4.INSPECT FRONT NO.2 SPEAKER

  1. Check that the malfunction disappears when another speaker in good condition is installed.

    OK:
    Malfunction disappears.

    HINT:
    1. Connect all the connectors to the speakers.
    2. When there is a possibility that either the right or left front speaker is defective, inspect by interchanging the right one with the left one.



NG
REPLACE FRONT NO.2 SPEAKER
OK

RETURN TO THE ORIGINAL INSPECTION FLOW BECAUSE THE CHECK RESULT IS NORMAL