B2450

Code No.B2450 Switch panel communication

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

CAUTION: Before replacing the radio and CD player or CD changer, be sure to check that the power supply circuit, ground circuit, and communication circuit are normal.

TROUBLE JUDGMENT
If the radio and CD player or CD changer cannot establish the communication with center panel assembly for 1 minute or more, the diagnostic trouble code is set.

COMMENTS ON TROUBLE SYMPTOM
The radio and CD player or CD changer, center panel assembly, or CAN bus line may have a problem.

PROBABLE CAUSES
- Malfunctions of radio and CD player or CD changer
- Malfunction of center panel assembly
- Malfunction of CAN bus line wiring harness and connector

DIAGNOSIS
STEP 1. Using scan tool MB991958, diagnose the CAN bus line.

Use scan tool MB991958 to diagnose the CAN bus lines.




1. Connect scan tool MB991958 to the data link connector.
2. Turn the ignition switch to "ON" position.
3. Diagnose the CAN bus line.

Q: Is the check result normal?

YES: Go to Step 2.

NO: Repair the CAN bus line. (Refer to Information Bus, Diagnosis.) On completion, go to Step 2.

STEP 2. Connection status check of radio and CD player or CD changer with center panel assembly

Check that the radio and CD player or CD changer are connected to the center panel assembly without any problem.

Q: Is the connection established?

YES: Go to Step 3.

NO: Securely connect the radio and CD player or CD changer with the center panel assembly.

STEP 3. Recheck for diagnostic trouble code.

Check again if the DTC is set to the radio and CD player or CD changer.
1. Erase the DTC.
2. Turn the ignition switch from "LOCK" (OFF) position to "ON" position.
3. Check if the DTC is set.

Q: Is the DTC set?

YES: Replace the radio and CD player or CD changer.

NO: The trouble can be an intermittent malfunction (Refer to How to use Troubleshooting/inspection Service Points, How to Cope with Intermittent Malfunction).