Lexus IS250 · Service Manual BODY ELECTRICAL

Gateway ECU Power Source Circuit

Circuit diagnosis

DESCRIPTION

This is the power source circuit to operate the gateway ECU.

WIRING DIAGRAM

E110884E05

INSPECTION PROCEDURE


1. INSPECT GATEWAY ECU

  1. I041860E04
    Disconnect the gateway ECU connector J76.

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

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

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

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



NG
REPAIR OR REPLACE HARNESS OR CONNECTOR
OK

PROCEED TO NEXT CIRCUIT INSPECTION SHOWN IN PROBLEM SYMPTOMS TABLE


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