Code No. P1B06: Maximum cell temperature abnormality during charging


caution If there is any problem in the CAN bus lines, an incorrect diagnosis code may be set. Prior to this diagnosis, always diagnose the CAN bus lines.

OPERATION



  • BMU communicates with EV-ECU via CAN.

DIAGNOSIS CODE SET CONDITIONS



  • If the maximum cell temperature of 60°C or more continues, the diagnosis code No. P1B06 will be set.

PROBABLE CAUSES



  • Malfunction of the BMU
  • Malfunction of the main battery
  • Malfunction of air outlet changeover system

DIAGNOSIS PROCEDURE

STEP 1. M.U.T.-III CAN bus diagnosis
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 line. (Refer to GROUP 54C - Troubleshooting .) Then go to Step 2.

STEP 2. Diagnosis code recheck after resetting CAN bus lines
Check again if the diagnosis code No. P1B06 is set to the EV-ECU.
(1)Erase the stored diagnosis code.
(2)Set the electric motor switch from the LOCK (OFF) position to the ON position.
(3)Check if the diagnosis code is set.

Q. Is the diagnosis code set?
Go to Step 3.
This diagnosis is complete.

STEP 3. Main battery cooling system check
Check that when operating the A/C (cooling), the cool air flows out to the foot area using the air outlet changeover dial (FOOT mode).

Q. Is the check result normal?
Replace the BMU. (Refer to .) Then go to Step 4.
Check the heater/air conditioner/ventilation. (Refer to GROUP 55 - Air Outlet Changeover Damper Motor Check .) Then go to Step 4.

STEP 4. Diagnosis code recheck
Check again if the diagnosis code is set to the EV-ECU.
(1)Erase the stored diagnosis code.
(2)Set the electric motor switch from the LOCK (OFF) position to the ON position.
(3)Check if the diagnosis code is set.

Q. Is the diagnosis code set?
Replace the main battery. (Refer to .) Then go to Step 5.
The diagnosis is complete.

STEP 5. Diagnosis code recheck
Check again if the diagnosis code is set to the EV-ECU.
(1)Erase the stored diagnosis code.
(2)Set the electric motor switch from the LOCK (OFF) position to the ON position.
(3)Check if the diagnosis code is set.

Q. Is the diagnosis code set?
Return to Step 1.
The diagnosis is complete.