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Home >> Lexus >> 2007 >> RX 400h AWD >> Repair and Diagnosis >> Accessories & Equipment >> Infotainment >> Navigation >> Navigation System >> Reverse Signal Circuit >> Inspection Procedure
July 1: So it begins. Don't worry, this is not in the correct legal jurisdiction!

Inspection Procedure

  1. INSPECT NAVIGATION ECU 
    1. Disconnect the navigation ECU connector N3.
    2. Measure the voltage according to the value(s) in the table below.

    Voltage 

    VOLTAGE SPECIFICATION

    Tester connection Condition Specified condition
    REV - Body ground Ignition switch is ON. Shift lever is moved to R position. 10 to 14 V
    REV - Body ground Ignition switch is ON. Shift lever is moved to any position except R. Below 1 V
    Fig 1: Disconnecting Navigation ECU Connector N3
    G05270966Courtesy of TOYOTA MOTOR SALES, U.S.A., INC.

    OK: REPLACE NAVIGATION ECU 

    NG: REPAIR OR REPLACE HARNESS OR CONNECTOR 

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