2012 Acura RLFACTORY OEM SERVICE PROCEDURE

DTC B2190: Assistant's Window Position Data Error

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 to LOCK (0) and then back to ON (II).
  3. Open and close the front passenger's window by using the front passenger's power window switch manually.
  4. Check for DTCs with the HDS.

    Is DTC B2177 or B2178 also indicated? 

    YES  -Troubleshoot the indicated DTC(s) first.

    NO  -Go to step 5.

  5. Reset the power window control unit (see RESETTING THE POWER WINDOW CONTROL UNIT  ).
  6. Clear the DTCs with the HDS.
  7. Turn the ignition switch to LOCK (0) and then back to ON (II).
  8. Open and close the front passenger's power window by using the front passenger's power window switch manually.
  9. Check for DTCs with the HDS.

    Is DTC B2190 indicated? 

    YES  -Go to step 10.

    NO  -The system is OK at this time.

  10. Turn the ignition switch to LOCK (0).
  11. Substitute a known-good passenger's MPCS unit.
  12. Clear the DTCs with the HDS.
  13. Turn the ignition switch to LOCK (0) and then back to ON (II).
  14. Open and close the front passenger's power window by using the front passenger's power window switch manually.
  15. Check for DTCs with the HDS.

    Is DTC B2190 indicated? 

    YES  -Faulty front passenger's window motor; replace front passenger's door regulator (see FRONT DOOR GLASS AND REGULATOR REPLACEMENT ).

    NO  -Replace the passenger's MPCS unit (see FRONT PASSENGER'S MPCS UNIT INPUT TEST/REPLACEMENT  ).

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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.