Code No. P1B06: Charging Cell MAX temp. high



caution
  • If there is any problem in the CAN bus lines, an incorrect diagnosis code may be stored. Prior to this diagnosis, diagnose the CAN bus lines (Refer to GROUP 54C - CAN Bus Diagnostics Table ).
  • Whenever ECU is replaced, ensure that the CAN bus lines are normal.

TROUBLE JUDGEMENT


The PHEV-ECU stores diagnosis code No. P1B06 when the highest cell temperature is abnormal while the drive battery is charged.

PROBABLE CAUSES



  • The battery cooling system fails
  • Malfunction of BMU
  • Malfunction of drive battery

DIAGNOSIS PROCEDURE


STEP 1. M.U.T.-III CAN bus diagnostics


Use the M.U.T.-III to diagnose the CAN bus lines.

Q. Is the check result normal?

Go to Step 3.
Repair the CAN bus lines (Refer to GROUP 54C - Troubleshooting ). On completion, go to Step 2.

STEP 2. Check whether the diagnosis code is stored again.


Recheck if the diagnosis code is stored.
(1)Erase the diagnosis code.
(2)Turn on the power supply mode of the electric motor switch .
(3)Check if the diagnosis code is stored.

Q. Is the diagnosis code stored?

Go to Step 3.
The procedure is complete.

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


Use M.U.T.-III to check whether the BMU related diagnosis code is stored. (Refer to ).

Q. Is any diagnosis code stored?

Troubleshoot for the relevant diagnosis code.
Go to Step 4.

STEP 4. M.U.T.-III data list


(1)Check the data list stored in the BMU, and identify which CMU is affected. (Refer to .)
note Charge the battery prior to this check.
Data list
  • Item No.8: Module maximum temperature
OK: -30 - 85 °C

  • Item No.9: Maximum temperature module ID
OK: 1 - 22
(2)Check the data list which is related to the affected CMU. (Refer to .)
note The CMU-related data list contains a fault history. After you check the data list, execute "Reset item No. 1: abnormal information in EEPROM". (Refer to GROUP 00 - .)

Q. Is the check result normal?

Go to Step 5.
Replace the relevant cell. Then go to Step 5.

STEP 5. Check whether the diagnosis code is stored again.


Recheck if the diagnosis code is stored.
(1)Erase the diagnosis code.
(2)Turn on the power supply mode of the electric motor switch.
(3)Check if the diagnosis code is stored.

Q. Is the diagnosis code stored?

Return to Step 1.
The procedure is complete.