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Home >> Toyota >> 2011 >> Avalon Base >> Repair and Diagnosis (Single Page) >> Body & Frame >> Seats >> Front Power Seat Control (Diagnostics & Circuit Tests) >> FRONT POWER SEAT CONTROL SYSTEM (w/ Memory) >> Circuit Tests >> Driving Position Memory Switch Circuit (w/ Memory) >> Procedure
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Driving Position Memory Switch Circuit (w/ Memory): Procedure

  1. READ VALUE USING TECHSTREAM 
    1. Connect Techstream to the DLC3.
    2. Turn the ignition switch on (IG).
    3. Read the DATA LIST.
      DRIVER SEAT:

      Tester Display Measurement Item/Range Normal Condition Diagnostic note
      M2 Switch Seat memory switch M2
      signal/ ON or OFF      		 ON: Seat memory switch M2 is ON
      OFF: Seat memory switch M2 is OFF      		 -
      M1 Switch Seat memory switch M1
      signal/ ON or OFF      		 ON: Seat memory switch M1 is ON
      OFF: Seat memory switch M1 is OFF      		 -
      SET Switch Seat memory set switch
      signal/ ON or OFF      		 ON: Memory set switch is ON
      OFF: Memory set switch is OFF      		 -

      OK

      Condition status can be displayed.

    NG → See step   2 

    OK → PROCEED TO  PROBLEM SYMPTOMS TABLE  NEXT CIRCUIT INSPECTION SHOWN IN PROBLEM SYMPTOMS TABLE 

  2. INSPECT SEAT MEMORY SWITCH 
    1. Remove the seat memory switch.
      Fig 1: Identifying Seat Memory Switch Connector Terminal Identification
      GTY174618Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
    2. Measure the resistance according to the value(s) in the table below.

      Resistance

      Tester Connection Condition Specified Condition
      1 (M1) - 4 (E) SW1 switch pushed Below 1 Ω
      2 (M2) - 4 (E) SW2 switch pushed Below 1 Ω
      3 (MRY) - 4 (E) SET switch pushed Below 1 Ω

    NG → REPLACE SEAT MEMORY SWITCH 

    OK: Go to next step 

  3. CHECK HARNESS AND CONNECTOR (SEAT MEMORY SWITCH CIRCUIT) 
    1. Measure the voltage according to the value(s) in the table below.
      Fig 2: Identifying Harness And Connector (Seat Memory Switch Circuit) Connector End View
      GTY196639Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

      Voltage

      Tester Connection Condition Specified Condition
      H7-1 (M1) - H7-4 (E) Ignition switch on (IG) 10 to 14 V
      H7-2 (M2) - H7-4 (E) Ignition switch on (IG) 10 to 14 V
      H7-3 (MRY) - H7-4 (E) Ignition switch on (IG) 10 to 14 V

    NG → See step   4 

    OK → PROCEED TO  PROBLEM SYMPTOMS TABLE  NEXT CIRCUIT INSPECTION SHOWN IN PROBLEM SYMPTOMS TABLE 

  4. CHECK HARNESS AND CONNECTOR (OUTER MIRROR CONTROL ECU ASSEMBLY - SEAT MEMORY SWITCH) 
    1. Disconnect the H1 connector from the door ECU.
      Fig 3: Identifying H1 Connector From Door ECU Connector End View
      GTY195577Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
    2. Measure the resistance according to the value(s) in the table below.

      Resistance

      Tester Connection Condition Specified Condition
      H7-1 (M1) - H1-22 (M1) Always Below 1 Ω
      H7-2 (M2) - H1-23 (M2) Always Below 1 Ω
      H7-3 (MRY) - H1-25 (MM) Always Below 1 Ω
      H7-4 (E) - Body ground Always Below 1 Ω
      H7-1 (M1) - Body ground Always 10 kΩ or higher
      H7-2 (M2) - Body ground Always 10 kΩ or higher
      H7-3 (MRY) - Body ground Always 10 kΩ or higher

    NG → REPAIR OR REPLACE HARNESS OR CONNECTOR 

    OK → REPLACE OUTER MIRROR CONTROL ECU ASSEMBLY 

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