Code No. U1943: LIN (EV-CAN back up) Parity Error




TROUBLE JUDGEMENT


Check Condition
  • The power supply mode of the electric motor switch is ON, or the drive battery starts to be charged.
Judgement Criterion
  • The parity error of the LIN communication is detected.

FAIL-SAFE AND BACKUP FUNCTION



  • Not available

PROBABLE CAUSES



  • The BMU is failed.

DIAGNOSIS PROCEDURE


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


Q. Is the diagnosis code stored?

Replace the BMU. Then go to Step 2.
Intermittent malfunction (Refer to GROUP 00 - How to Use Troubleshooting/Inspection Service Points - How to Cope with Intermittent Malfunctions ).

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


Reconfirm whether the diagnosis codes are stored in BMU.

  1. Erase the stored diagnosis codes.
  2. Without depressing the brake pedal, operate the electric motor switch with the power supply mode of the electric motor switch OFF to turn ON the power supply mode of the electric motor switch.
  3. Confirm whether the diagnosis codes are stored.

Q. Is the diagnosis code stored?

Replace the PHEV-ECU. Check whether the diagnosis code is stored in the PHEV-ECU. (Refer to ).
Check end.