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DTC B1140: Driver's Power Window Position Detect Circuit Error

WARNING: This page is about a different car, the 2008 Acura TSX, 2007 Acura TSX, 2006 Acura TSX, 2005 Acura TSX, and 2004 Acura TSX. However, it is still accessible from the selected car via links, so may be relevant.
  1. Clear the DTCs using the HDS.
  2. Cycle the ignition switch to OFF and then back ON (II).
  3. Open and close the driver's power window by using the driver's switch manually.
  4. Check for DTCs using the HDS.

    Is DTC B1125 or B1126 indicated? 

    YES  -Troubleshoot the DTC B1125 or B1126 (see DTC B1125: DRIVER'S POWER WINDOW MOTOR A PULSE ERROR; DTC B1126: DRIVER'S POWER WINDOW MOTOR B PULSE ERROR  ).

    NO  -Go to step 5.

  5. Do the power window control unit reset procedure (see RESETTING THE POWER WINDOW  ).
  6. Check for DTCs again using the HDS.

    Is DTC B1140 indicated? 

    YES  -Faulty door multiplex control unit; replace the power window master switch.

    NO  -The system is recovered at this time.

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