Code No. P1A6A: CMU01 Module Temperature Abnormal (high input),
Code No. P1A6B: CMU02 Module Temperature Abnormal (high input),
Code No. P1A6C: CMU03 Module Temperature Abnormal (high input),
Code No. P1A6D: CMU04 Module Temperature Abnormal (high input),
Code No. P1A6E: CMU05 Module Temperature Abnormal (high input),
Code No. P1A70: CMU07 Module Temperature Abnormal (high input),
Code No. P1A71: CMU08 Module Temperature Abnormal (high input),
Code No. P1A72: CMU09 Module Temperature Abnormal (high input),
Code No. P1A73: CMU10 Module Temperature Abnormal (high input),
Code No. P1A74: CMU11 Module Temperature Abnormal (high input)




TROUBLE JUDGEMENT


Check Conditions
  • The power supply mode of the electric motor switch is ON, or the drive battery starts to be charged.
  • The following diagnosis code is not stored:

  1. P1AA8: Local CAN (for drive battery) signal time-out
Judgement Criterion
  • The module temperature is more than or equal to the specified value.

FAIL-SAFE AND BACKUP FUNCTION



  • Not available

PROBABLE CAUSES



  • The drive battery cooling is insufficient with the failed air conditioner control system.
  • The module (battery cell, CMU and module temperature sensor) in the drive battery is failed.

DIAGNOSIS PROCEDURE


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


Q. Is diagnosis code of compressor & heater controller stored?

Check the compressor & heater controller. (Refer to GROUP 55 - Troubleshooting - Diagnosis Code Chart <Compressor & heater controller> ).
Go to Step 2.

STEP 2. M.U.T.-III data list



  • Check the data list reference table corresponding to the diagnosis code (Refer to ).
OK: At ambient temperature (atmospheric temperature) or equivalent (when the vehicle driving and the charge are not performed for a long time)

Q. Is the check result normal?

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

STEP 3. M.U.T.-III data list



  • Check the CMU having an abnormality.
  • Reset the information about the malfunction of the CMU (Refer to GROUP 00 - Precautions Before Service - CMU EEPROM Failure Information Reset ).

  • CMU Data List Reference Table (Refer to .)

  1. Item 31: Temperature sensor 1 (open)
  2. Item 32: Temperature sensor 2 (open)
  3. Item 33: Temperature sensor 3 (open)
  4. Item 34: Temperature sensor 4 (open)
  5. Item 35: Temperature sensor 5 (open)
  6. Item 37: Temperature sensor 1 (short)
  7. Item 38: Temperature sensor 2 (short)
  8. Item 39: Temperature sensor 3 (short)
  9. Item 40: Temperature sensor 4 (short)
  10. Item 41: Temperature sensor 5 (short)
  11. Item 67: Temperature sensor 1 underflow
  12. Item 68: Temperature sensor 2 underflow
  13. Item 69: Temperature sensor 3 underflow
  14. Item 70: Temperature sensor 4 underflow
  15. Item 71: Temperature sensor 5 underflow
  16. Item 73: Temperature sensor 1 overflow
  17. Item 74: Temperature sensor 2 overflow
  18. Item 75: Temperature sensor 3 overflow
  19. Item 76: Temperature sensor 4 overflow
  20. Item 77: Temperature sensor 5 overflow

Q. Is the check result normal?

Intermittent malfunction (Refer to GROUP 00 - How to Use Troubleshooting/Inspection Service Points - How to Cope with Intermittent Malfunctions ).
Remove the battery tray cover (Refer to ). Then, go to Step 4.

STEP 4. Bus bar installation check



  • Check the battery module bus bar where the diagnosis code is stored.

Q. Check whether the bus bar is correctly installed.

Assemble the drive battery assembly (Refer to ). Then, go to Step 5.
Modify the bus bar installation. Then, assemble the drive battery assembly (Refer to ).

STEP 5. M.U.T.-III data list



  • CMU Data List Reference Table (Refer to )

  1. Item 22: Cell monitor IC 1
  2. Item 23: Cell monitor IC 2
  3. Item 24: Cell monitor IC 3
  4. Item 25: Cell monitor IC 4
  5. Item 26: Cell monitor IC 5
  6. Item 27: Cell monitor IC 6
  7. Item 28: Voltage sensor
  8. Item 29: Microcomputer reference voltage
  9. Item 30: IC reference voltage
  10. Item 79: EEPROM Fail (numbering data read
  11. Item 80: EEPROM Fail (learning data read)
  12. Item 81: CAN controller
  13. Item 88: A/D conversion (reference voltage)
  14. Item 89: A/D conversion (temperature sensor 1)
  15. Item 90: A/D conversion (temperature sensor 2)
  16. Item 91: A/D conversion (temperature sensor 3)
  17. Item 92: A/D conversion (temperature sensor 4)
  18. Item 93: A/D conversion (temperature sensor 5)
  19. Item 95: A/D conversion (module voltage)
  20. Item 98: Bat-CAN (bus off)

Q. Are the check result normal?

Remove the battery tray cover (Refer to ). Replace the battery module where the CMU ID is not numbered. Then, assemble the drive battery assembly (Refer to ).
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 ).