LEMON Manuals: Even more car manuals for everyone: 1960-2025
Home >> Acura >> 2014 >> TL Base >> Repair and Diagnosis (Single Page) >> Body & Frame >> Door Locks >> Keyless Access System >> DTC Troubleshooting >> DTC B12D0: Power Control Unit IG1A Circuit Error; DTC B12D1: Power Control Unit IG1B Circuit Error; DTC B12D2: Power Control Unit IG2 Circuit Error; DTC B12D3: Power Control Unit IG Latch Circuit Error
April 5, 2026: LEMON Manuals is launched! Read the announcement.

DTC B12D0: Power Control Unit IG1A Circuit Error; DTC B12D1: Power Control Unit IG1B Circuit Error; DTC B12D2: Power Control Unit IG2 Circuit Error; DTC B12D3: Power Control Unit IG Latch Circuit Error

NOTE:
  1. Clear the DTCs with the HDS.
  2. Do this procedure 5 times:
    • Press the engine start/stop button to select the OFF mode
    • Wait 10 seconds
    • Select the ACC mode
    • Wait 10 seconds
    • Select the ON mode
    • Wait 10 seconds before repeating this procedure
  3. Check for DTCs with the HDS.

    Are DTCs B12D0, B12D1, B12D2, and/or B12D3 indicated? 

    YES  - Replace the power control unit (see CONTROL UNIT INPUT TEST  ).

    NO  - Intermittent failure, the system is OK at this time.