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DTC B1209: Driver Side Outer Mirror: Procedure

WARNING: This page is about a different car, the 2011 Toyota Avalon. However, it is still accessible from the selected car via links, so may be relevant.
  1. CHECK HARNESS AND CONNECTOR (MEMORY MIRROR ECU - BATTERY AND BODY GROUND) 
    1. Disconnect the H1 ECU connector.
    2. Measure the voltage according to the value(s) in the table below.

      Voltage

      Tester Connection Condition Specified Connection
      H1-4 (CPUB) - Body ground Always 10 to 14 V
    3. Measure the resistance according to the value(s) in the table below.

      Resistance

      Tester Connection Condition Specified Connection
      H1-1 (GND) - Body ground Always Below 1 Ω

    NG → REPAIR OR REPLACE HARNESS OR CONNECTOR 

    OK: Go to next step 

  2. CHECK RESISTANCE OF COMMUNICATION LINE 
    1. Disconnect the H1 and E30 ECU connectors.
    2. Measure the resistance according to the value(s) in the table below.

      Resistance

      Tester Connection Condition Specified Connection
      H1-8 (MPX1) - E30-33 (MPX+) Always Below 1 Ω

    NG → REPAIR OR REPLACE HARNESS OR CONNECTOR 

    OK → REPLACE MEMORY MIRROR ECU 

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