Code No. P1A9A: CMU ID Auto Numbering Error




TROUBLE JUDGEMENT


Check Conditions
  • When numbering the CMU ID
  • The following diagnosis code is not stored.

  1. U1925: CMU ID numbering reception error
Judgement Criterion
  • The abnormal information of the CMU ID numbered is detected.

FAIL-SAFE AND BACKUP FUNCTION



  • Not available

PROBABLE CAUSES



  • The CMU is failed.
  • The numbering CMU ID circuit is failed.
  • The BMU is failed.

DIAGNOSIS PROCEDURE


STEP 1. M.U.T.-III diagnosis code


Q. Is diagnosis code U1925 stored?

Check code No. U1925: CMU ID numbering reception error (Refer to ).
Go to Step 2.

STEP 2. M.U.T.-III diagnosis code



  • Reconfirmation of diagnosis code.

Q. Is the diagnosis code stored?

Go to Step 3.
Intermittent malfunction (Refer to GROUP 00 - How to Use Troubleshooting/Inspection Service Points - How to Cope with Intermittent Malfunctions ).

STEP 3. M.U.T.-III diagnosis code



  • Use the M.U.T.-III and perform the numbering CMU ID.

Q. Is the diagnosis code stored?

Remove the battery tray cover (Refer to ). Replace the CMU where the CMU ID is not numbered. Then, assemble the drive battery assembly (Refer to ).
Intermittent malfunction (Refer to GROUP 00 - How to Use Troubleshooting/Inspection Service Points - How to Cope with Intermittent Malfunctions ).