2010 Scion tC AutomaticFACTORY OEM SERVICE PROCEDURE

Driver Side Power Window Auto Up / Down Function does not Operate with Power Window Master Switch: Procedure

  1. CHECK MANUAL UP/DOWN FUNCTION (DRIVER SIDE) 
    1. Check that the power window manual UP/DOWN function operates normally.

    NG → OTHER PROBLEM 

    OK: Go to next step 

  2. CHECK LIGHT OF POWER WINDOW REGULATOR MASTER SWITCH ASSEMBLY (DRIVER SIDE SWITCH) 
    Fig 1: Identifying Power Window Regulator Master Switch
    GTY160579Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
    1. Turn the ignition switch ON.
    2. Operate the driver side switch on the master switch.
    3. Check the blinking pattern of the AUTO light as shown in the illustration.

      Result

      Result Proceed to
      Pattern (1) or (3) is displayed A
      Pattern (2) is displayed B
      Normal pattern is displayed C
      Fig 2: Blinking Pattern Of AUTO Light
      GTY165404Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

    C → REPLACE POWER WINDOW REGULATOR MASTER SWITCH ASSEMBLY (DRIVER SIDE) 

    B → See step   4 

    A: Go to next step 

  3. RESET POWER WINDOW REGULATOR MOTOR ASSEMBLY LH (DRIVER SIDE) 

    OK → END 

    NG: Go to next step 

  4. CHECK WIRE HARNESS (POWER WINDOW REGULATOR MASTER SWITCH ASSEMBLY - POWER WINDOW REGULATOR MOTOR ASSEMBLY LH) 
    Fig 3: Identifying P9 Master Switch And P10 Motor Connector Terminals
    GTY160734Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
    1. Disconnect the P9 master switch connector.
    2. Disconnect the P10 motor connector.
    3. Measure the resistance of the wire harness side connectors.

      Standard resistance

      Tester Connection Specified Condition
      P9-19 (VC) - P10-4 (SSRB) Below 1 Ω
      P9-5 (PLS) - P10-5 (PLS) Below 1 Ω
      P9-15 (PLS2) - P10-3 (PLS2) Below 1 Ω
      P9-12 (SGND) - P10-6 (E) Below 1 Ω
      P9-19 (VC) - Body ground 10 kΩor higher
      P9-5 (PLS) - Body ground 10 kΩor higher
      P9-15 (PLS2) - Body ground 10 kΩor higher

    NG → REPAIR OR REPLACE HARNESS AND CONNECTOR 

    OK → REPLACE POWER WINDOW REGULATOR MOTOR ASSEMBLY LH (DRIVER SIDE) 

Factory Service Tools

Use the Manual With the Right Hardware

Pair factory procedures with proven DIY tools so the instructions are easier to execute.

Disclosure: Verified tool recommendations may earn an affiliate commission at no cost to you.

Shop Manual-Ready ToolsCompare Repair QuoteQuote Shield Pro

When to See a Mechanic

Stop DIY work and contact a certified mechanic immediately if any of the following apply:

  • • You smell fuel, burning insulation, or see smoke.
  • • Brakes feel soft, pull hard to one side, or make grinding noises.
  • • The engine overheats, stalls repeatedly, or misfires under load.
  • • You are missing required tools, torque specs, or safe lifting equipment.
  • • You are not confident in the next step or safety outcome.

Rather have a pro handle this?

A certified mobile mechanic comes to your home or office. They bring the tools, you stay comfortable. No tow truck, no waiting room, no surprises.

Comes to youSame-day available12-month warranty
Get a Free Quote

No obligation. See pricing before you book.