Navigation System Stereo Component Amplifier Power Source Circuit

Body Electrical. Lexus Gs430, Gs300. Uzs190 Grs190
Navigation. Lexus Gs430, Gs300. Uzs190 Grs190

DESCRIPTION

WIRING DIAGRAM

INSPECTION PROCEDURE

INSPECT FUSE (RAD NO. 1, RAD NO. 2, ACC)

CHECK WIRE HARNESS (STEREO COMPONENT AMPLIFIER - BATTERY AND BODY GROUND)

NAVIGATION SYSTEM - Stereo Component Amplifier Power Source Circuit


DESCRIPTION

This circuit provides the power to the stereo component amplifier.

WIRING DIAGRAM


Lexus Gs430, Gs300. Uzs190 Grs190.Navigation.Navigation System.Navigation System  Stereo Component Amplifier Power Source Circuit


INSPECTION PROCEDURE

1.INSPECT FUSE (RAD NO. 1, RAD NO. 2, ACC)
  1. Remove the RAD NO. 1 and RAD NO. 2 fuses from the engine room No. 1 relay block.

  1. Remove the ACC fuse from the cowl side junction block RH.

  1. Measure the resistance of the fuses.

    Standard resistance:
    Below 1 Ω


NG
REPLACE FUSE
OK


2.CHECK WIRE HARNESS (STEREO COMPONENT AMPLIFIER - BATTERY AND BODY GROUND)


    Lexus Gs430, Gs300. Uzs190 Grs190.Navigation.Navigation System.Navigation System  Stereo Component Amplifier Power Source Circuit
  1. Disconnect the V29 and V31 amplifier connectors.

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

    Standard voltage:
    Tester Connection
    Condition
    Specified Condition
    V31-1 (+B) - Body ground
    Always
    10 to 14 V
    V31-10 (+B2) - Body ground
    Always
    10 to 14 V
    V29-12 (ACC) - Body ground
    Engine switch on (ACC)
    10 to 14 V
  1. Measure the resistance of the wire harness side connector.

    Standard resistance:
    Tester Connection
    Condition
    Specified Condition
    V31-16 (GND) - Body ground
    Always
    Below 1 Ω
    V31-15 (GND2) - Body ground
    Always
    Below 1 Ω


NG
REPAIR OR REPLACE HARNESS AND CONNECTOR
OK

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