Driver Side Speaker Circuit

DESCRIPTION

When the vehicle is equipped with a navigation system, a sound signal for the driver's side is sent from the stereo component amplifier to the driver's side speaker via the navigation ECU.

WIRING DIAGRAM

INSPECTION PROCEDURE

1. CHECK NAVIGATION VOICE GUIDANCE

1. Check if navigation voice guidance is heard from the speaker on the driver's side.

   OK:

   Voice guidance is heard.
   

NG	GO TO NAVIGATION SYSTEM

OK

2. INSPECT NAVIGATION ECU

1. Disconnect the navigation ECU connector N4.

2. Measure the resistance according to the values in the table below.

   Standard resistance:

   Tester connection	Condition	Specified condition
   AUI+ - AUO+	Always	Below 1 Ω
   AUI- - AUO-	Always	Below 1 Ω

NG	REPLACE NAVIGATION ECU

OK

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

1. Disconnect the connectors from the navigation ECU and stereo component amplifier.

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

   Standard resistance (LHD):

   Tester connection	Condition	Specified condition
   AUI+ - TFL+ (*1), FL+ (*2)	Always	Below 1 Ω
   AUI- - TFL- (*1), FL- (*2)	Always	Below 1 Ω
   AUI+ - Body ground	Always	10 kΩ or higher
   AUI- - Body ground	Always	10 kΩ or higher

   Standard resistance (RHD):

   Tester connection	Condition	Specified condition
   AUI+ - TFR+ (*1), FR+ (*2)	Always	Below 1 Ω
   AUI- - TFR- (*1), FR- (*2)	Always	Below 1 Ω
   AUI+ - Body ground	Always	10 kΩ or higher
   AUI- - Body ground	Always	10 kΩ or higher

   *1: Mark Levinson System*2: Standard System

NG	REPAIR OR REPLACE HARNESS OR CONNECTOR

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