Code No. P1AC4: Calculation Abnormal


TROUBLE JUDGMENT
Check Condition
  • 2 seconds elapse after the electric motor switch is turned ON, or 2 seconds elapse after the main battery starts to be charged.
Judgement Criterion
  • The result of two RAM calculations is not the same.

FAIL-SAFE AND BACKUP FUNCTION

  • Not available

PROBABLE CAUSE

  • The BMU is failed.

DIAGNOSIS PROCEDURE


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

Q. Is the diagnosis code set?
Replace the BMU.
Intermittent malfunction (Refer to GROUP 00 - How to Use Troubleshooting/Inspection Service Points - How to Cope with Intermittent Malfunctions ).