B2465

DTC B2465: Ignition switch signal error

TROUBLE JUDGEMENT

If 5 seconds or more elapses with the ignition switch state and the data from the CAN communication contradicted, the combination meter stores the DTC B2465.

TROUBLESHOOTING HINTS

- The CAN bus line may be defective
- The ETACS-ECU may be defective
- The combination meter may be defective

DIAGNOSIS

Required Special Tools:

- MB991958: Scan Tool (M.U.T.-III Sub Assembly)
- MB991824: Vehicles Communication Interface (V.C.I.)
- MB991827: M.U.T.-III USB Cable
- MB991910: M.U.T.-III Main Harness A (Vehicles with CAN communication system)

STEP 1. Using scan tool MB991958, read the ETACS-ECU diagnostic trouble code

Check if DTC is set to the ETACS-ECU.





(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 from "LOCK" (OFF) position to "ON" position.
(3)Check if DTC is set.
(4)Turn the ignition switch to the "LOCK" (OFF) position.

Q. Is the DTC set?

YES Troubleshoot the ETACS-ECU (Refer to Electronic Time and Alarm Control System (ETACS)).

NO Go to Step 2.

STEP 2. Using scan tool MB991958, diagnose the CAN bus line.

(1)Turn the ignition switch to the "ON" position.

(2)Diagnose the CAN bus line.

(3)Turn the ignition switch to the "LOCK" (OFF) position.

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

YES Go to Step 3.
NO Repair the CAN bus line CAN Bus Diagnostics Chart).
STEP 3. Combination meter operation check

Check that the combination meter works normally.

Q. Is the check result normal?

YES Go to Step 4.
NO Check the power supply circuit of combination meter (Refer to Inspection Procedure 1).
STEP 4. Recheck for diagnostic trouble code.

Check again if the DTC is set to the combination meter.

(1)Erase the DTC.

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

(3)Check if DTC is set.

(4)Turn the ignition switch to the "LOCK" (OFF) position.

Q. Is the DTC set?

YES Replace the combination meter.
NO The trouble can be an intermittent malfunction How to Cope With Intermittent Malfunctions).