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

NOTE: If you are troubleshooting multiple DTCs, be sure to follow the instructions in B-CAN System Diagnosis Test Mode A (see TROUBLESHOOTING - B-CAN SYSTEM DIAGNOSIS TEST MODE A ).
  1. Clear the DTCs with the HDS.
  2. Turn the ignition switch 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 with the HDS.

    Are DTCs B1125 or B1126 indicated? 

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

    NO  -Go to step 5.

  5. Reset the power window control unit (see RESETTING THE POWER WINDOW CONTROL UNIT  ).
  6. Check for DTCs again with the HDS.

    Is DTC B1140 indicated? 

    YES  -Go to step 7.

    NO  -The system is recovered at this time.

  7. Substitute a known-good power window master switch.
  8. Open and close the driver's power window by using the driver's switch manually.
  9. Check for DTCs with the HDS.

    Is DTC B1140 indicated? 

    YES  -Faulty driver's power window motor; replace it.

    NO  -Faulty door multiplex control unit; replace the power window master switch.

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