Code No. U1082: Local CAN (for main battery) Bus Off






TROUBLE JUDGMENT
Check Condition
  • 3 seconds elapse after the electric motor switch is turned ON, or 3 seconds elapse after the main battery starts to be charged.
Judgement Criterion
  • When the bus off of the BMU is judged.

FAIL-SAFE AND BACKUP FUNCTION

  • Not available

PROBABLE CAUSES

  • The harnesses and connectors are failed.
  • The BMU is failed.

DIAGNOSIS PROCEDURE


STEP 1. Connector check: C-26 main battery connector

Q. Is the check result normal?
Go to Step 2 .
Repair it. Then go to Step 8 .

STEP 2. Check the local CAN (for main battery) terminating resistance itself

  • Check the local CAN (for main battery) terminating resistance itself (Refer to ).

Q. Is the check result normal?
Go to Step 3 .
After replacing the main battery, then go to Step 8 .

STEP 3. Connector check: C-109 BMU connector

Q. Is the check result normal?
Go to Step 4 .
Repair it. Then go to Step 8 .

STEP 4. Check harness between C-26 (terminal No. 10) main battery connector and C-109 (terminal No. 38) BMU connector

  • Check signal line for open circuit, short circuit to earth, short circuit to power supply system and damage.

Q. Is the check result normal?
Go to Step 5 .
Repair it. Then go to Step 8 .

STEP 5. Check harness between C-26 (terminal No. 5) main battery connector and C-109 (terminal No. 37) BMU connector

  • Check signal line for open circuit, short circuit to earth, short circuit to power supply system and damage.

Q. Is the check result normal?
Go to Step 6 .
Repair it. Then go to Step 8 .

STEP 6. M.U.T.-III diagnosis code
Reconfirm whether the diagnosis codes are set from BMU.

  1. Erase the diagnosis codes being set.
  2. Electric motor switch: "LOCK" (OFF) → ON
  3. Confirm whether the diagnosis codes are set.

Q. Is the diagnosis code set?
Go to Step 7 .
Intermittent malfunction (Refer to GROUP 00 - How to Use Troubleshooting/Inspection Service Points - How to Cope with Intermittent Malfunctions ).

STEP 7. After replacing the main battery, reconfirm the diagnosis code.
After replacing the main battery, reconfirm whether the diagnosis codes are set from BMU.

  1. Erase the diagnosis codes being set.
  2. Electric motor switch: "LOCK" (OFF) → ON
  3. Confirm whether the diagnosis codes are set.

Q. Is the diagnosis code set?
Replace the BMU. Then go to Step 8 .
Go to Step 8 .

STEP 8. M.U.T.-III diagnosis code
Reconfirm whether the diagnosis codes are set from BMU.

  1. Erase the diagnosis codes being set.
  2. Electric motor switch: "LOCK" (OFF) → ON
  3. Confirm whether the diagnosis codes are set.

Q. Is the diagnosis code set?
Go to Step 1 .
Check end.