U1514

DTC U1514: Bit error (LIN)

TROUBLE JUDGMENT

The ETACS-ECU receives and sends data simultaneously. If the data contains a fault, the ETACS-ECU will set DTC U1514.

TROUBLESHOOTING HINTS

- The slave ECU may be defective.
- The ETACS-ECU may be defective.
- Electrical noise generated in the LIN bus lines

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)

Recheck for diagnostic trouble code.

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

Q. Is the DTC set?

YES [A DTC other than U1514 is set.] : Replace the appropriate ECU.

YES [The DTC U1514 is set.] : Replace the ETACS-ECU.

NO [The DTC is not set.] : The trouble can be an intermittent malfunction How to Cope With Intermittent Malfunctions).