B2418

DTC B2418: OSS authenticate time-out

CAUTION:

- If the diagnosis code No. B2418 is set, diagnose the CAN bus lines.
- When replacing the ECU, always check that the communication circuit is normal.

DTC SET CONDITION

KOS-ECU checks whether the OSS-ECU data is received via CAN bus line, and it sets the DTC B2418 if the data cannot be received.

TECHNICAL DESCRIPTION (COMMENT)

If the reception of data from OSS-ECU received via CAN bus line (OSS-ECU sends data to KOS-ECU via CAN bus line) is not possible, KOS-ECU determines that a problem has occurred.

TROUBLESHOOTING HINTS

- Malfunction of CAN bus line
- Malfunction of OSS-ECU
- Malfunction of KOS-ECU

DIAGNOSIS

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

(1)
CAUTION:
To prevent damage to scan tool (MB991958), always turn the power supply mode of the engine switch to the OFF position before connecting or disconnecting scan tool (MB991958).

Connect scan tool MB991958. Refer to "How to connect scan tool (M.U.T.-III) Reading and Clearing Diagnostic Trouble Codes."

(2)Turn the power supply mode of the engine switch to ON.

(3)Diagnose the CAN bus line.

(4)Turn the power supply mode of the engine switch to OFF.

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. Using scan tool MB991958, read the other system diagnostic trouble code.

Check again if the DTC is set to the OSS-ECU.

(1)
CAUTION:
To prevent damage to scan tool (MB991958), always turn the power supply mode of the engine switch to the OFF position before connecting or disconnecting scan tool (MB991958).

Connect scan tool MB991958. Refer to "How to connect scan tool (M.U.T.-III) Reading and Clearing Diagnostic Trouble Codes."

(2)Erase the DTC.

(3)Turn the power supply mode of the engine switch to ON.

(4)Check if DTC is set.

(5)Turn the power supply mode of the engine switch to OFF.

Q. Is the DTC set?

YES Perform troubleshooting for the OSS-ECU (Refer to troubleshooting Keyless Operation System (KOS)).
On completion, go to Step 3.
NO Go to Step 3.
STEP 3. Recheck for diagnostic trouble code.

Check again if the DTC is set to the KOS-ECU.

(1)Erase the DTC.

(2)Turn the power supply mode of the engine switch from OFF to ON.

(3)Check if DTC is set.

(4)Turn the power supply mode of the engine switch to OFF.

Q. Is the DTC set?

YES Replace KOS-ECU and register the ID codes (Refer to ID Codes Registration Procedure).
NO The trouble can be an intermittent malfunction How to Cope With Intermittent Malfunctions).