Code No.B2477: Chassis No. Not Programmed


caution
  • If the diagnosis code No. B2477 is set, be sure to diagnose the CAN bus line.
  • When replacing the CAN box unit, always check that the communication circuit is normal. (Check that the voltage is 10 V or more.)

TROUBLE JUDGEMENT



PROBABLE CAUSES



  • Malfunction of the CAN bus line.
  • Malfunction of the ETACS-ECU.
  • Malfunction of the CAN box unit.

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 2.
Repair the CAN bus line (Refer to GROUP 54C - Troubleshooting ).

STEP 2. M.U.T.-III other system diagnosis code
Check if the diagnosis code is set to the ETACS-ECU.

Q. Is the diagnosis code set?
Diagnose the ETACS-ECU (Refer to GROUP 54A - ETACS-ECU - Troubleshooting ).
Go to Step 3.

STEP 3. Recheck for diagnosis code.
Check again if the diagnosis code is set to the CAN box unit.
(1)Erase the diagnosis code.
(2)Turn the ignition switch from "LOCK" (OFF) position to "ON" position.
(3)Check if diagnosis code is set.

Q. Is the diagnosis code set?
Replace the CAN box unit.
The trouble can be an intermittent malfunction (Refer to GROUP 00, How to use Troubleshooting/inspection Service Points - How to Cope with Intermittent Malfunction ).