Lexus IS250 · Service Manual BODY ELECTRICAL

Stereo Component Amplifier Power Source Circuit

Circuit diagnosis

DESCRIPTION

This circuit provides power to the stereo component amplifier.

WIRING DIAGRAM

E121273E01

INSPECTION PROCEDURE


1. INSPECT STEREO COMPONENT AMPLIFIER

  1. E121274E01
    Disconnect the stereo component amplifier connectors.

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

    Standard resistance:
    Tester connection
    Condition
    Specified condition
    GND - Body ground
    Always
    Below 1 Ω
    GND2 - Body ground
    Always
    Below 1 Ω

  1. Measure the voltage according to the values in the table below.

    Standard voltage:
    Tester connection
    Condition
    Specified condition
    +B - GND
    Always
    10 to 14 V
    +B2 - GND
    Always
    10 to 14 V
    ACC - GND
    Engine switch on (ACC)
    10 to 14 V



NG
REPAIR OR REPLACE HARNESS OR CONNECTOR
OK

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