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DTC B22AC: Alternater Stop Power Generation; DTC B22AD: No Control for Power Generation of Alternator: Procedure

WARNING: This page is about a different car, the 2010 Lexus LS 460L and 2010 Lexus LS 460. However, it is still accessible from the selected car via links, so may be relevant.
  1. CHECK GENERATOR ASSEMBLY 
    1. Check the generator. Refer to COMPONENTS .

      OK

      Charging system is normal.

    NG → See step   2 

    OK → See step   3 

  2. REPLACE GENERATOR ASSEMBLY. Refer to  REMOVAL 
  3. GO TO SFI SYSTEM. Refer to  HOW TO PROCEED WITH TROUBLESHOOTING