Code No.B2451 Audio panel type error


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.

TROUBLE JUDGMENT
If the audio unit consecutively receive the display trouble signal from the centre panel assembly for 1 minute, the diagnosis code is set.

COMMENTS ON TROUBLE SYMPTOM
The centre panel assembly or CAN bus line may have a problem.

PROBABLE CAUSES

  • Malfunction of centre panel assembly
  • Malfunction of CAN bus line wiring harness and connector

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. Check whether the diagnosis code is reset.
Check again if the diagnosis code is set to the audio 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 centre panel assembly.
The trouble can be an intermittent malfunction (Refer to GROUP 00 - How to use Troubleshooting/inspection Service Points - How to Cope with Intermittent Malfunction ).