B2423

DTC B2423: 6 CD player error

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, be sure to check that the power supply circuit, ground circuit, and communication circuit are normal.

TROUBLE JUDGMENT

During the use of the CD changer of radio and CD player, if any of the ERROR, ERROR01, ERROR02, ERROR03, ERROR DC or ERROR HOT continues for 1 minute, the diagnostic trouble code is set.

TECHNICAL DESCRIPTION (COMMENT)

The radio and CD player or CAN bus line may have a problem.

TROUBLESHOOTING HINTS

- Malfunctions of radio and CD player

- Malfunction of CAN bus line wiring harness and connector

DIAGNOSIS

Required Special Tools:

- MB991958: Scan Tool (M.U.T.-III Sub Assembly)
- MB991824: Vehicle Communication Interface (V.C.I.)

- MB991827: M.U.T.-III USB Cable

- MB991910: M.U.T.-III Main Harness A

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





(1)
CAUTION:
To prevent damage to scan tool MB991958, always turn the ignition switch to the "LOCK" (OFF) position before connecting or disconnecting scan tool MB991958.

Connect scan tool MB991958. Refer to "How to connect the Scan Tool (M.U.T.-III) Reading and Clearing Diagnostic Trouble Codes."
(2)Turn the ignition switch to the "ON" position.
(3)Diagnose the CAN bus line.
(4)Turn the ignition switch to the "LOCK" (OFF) position.

Q. Is the CAN bus line found to be normal?

YES Go to Step 2.

NO Repair the CAN bus line. CAN Bus Diagnostics Chart).

STEP 2. CD check

Playback a clean and unscratched CD for one minute, and recheck if the diagnostic trouble code is set to the radio and CD player.

(1)Erase the diagnostic trouble code.

(2)Turn the ignition switch from "LOCK" (OFF) position to "ON" position.

(3)Playback the clean, unscratched CD for one minute.

(4)Check if diagnostic trouble code is set.

Q. Is the DTC set?

YES Go to Step 3.
NO Clean the CD, use a CD without scratches and burrs, or remove the CD burrs, and then reinsert the CD.
STEP 3. Recheck for diagnostic trouble code.

Check again if the DTC is set to the radio and CD player.

(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.
NO The trouble can be an intermittent malfunction How to Cope With Intermittent Malfunctions).