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Inspection Procedure

WARNING: This page is about a different car, the 2007 Lexus GX 470. However, it is still accessible from the selected car via links, so may be relevant.
  1. CHECK HARNESS AND CONNECTOR (COMMUNICATION LINE) 
    Fig 1: Identifying R10 & T6 ECU Connector Terminals
    G05267263Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
    1. Disconnect the R10 and T6 ECU connectors.
    2. Check the resistance between the wire harness side connectors.

    Standard resistance 

    RESISTANCE SPECIFICATION

    Symbols (Terminal No.) Specified Condition
    MPX1 (R10-13) - MPX1 (T6-5) Below 1 Ω

    NG: REPAIR OR REPLACE HARNESS OR CONNECTOR 

    OK: Go to Next step 

  2. CHECK HARNESS AND CONNECTOR (POWER SOURCE) 
    Fig 2: Identifying R10 Outer Mirror Control ECU Connector Terminals
    G05267264Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
    1. Check the voltage between the wire harness side connector and body ground.

    Standard voltage 

    VOLTAGE SPECIFICATION

    Symbols (Terminal No.) Specified Condition
    +B (R10-1) - Body ground 10 to 14 V

    NG: REPAIR OR REPLACE HARNESS OR CONNECTOR 

    OK: Go to Next step 

  3. CHECK HARNESS AND CONNECTOR (GROUND) 
    Fig 3: Identifying R10 Outer Mirror Control ECU Connector Terminals
    G05267265Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
    1. Check the resistance between the wire harness side connector and body ground.

Standard resistance 

RESISTANCE SPECIFICATION

Symbols (Terminal No.) Specified Condition
GND (R10-14) - Body ground Below 1 Ω

NG: REPAIR OR REPLACE HARNESS OR CONNECTOR 

OK: REPLACE OUTER MIRROR CONTROL ECU 

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