U1514
DTC U1514: Bit error (LIN)TROUBLE JUDGEMENT
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.
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.
1. Ensure that the ignition switch is at the "LOCK" (OFF) position.
2. Start up the personal computer.
3. Connect special tool MB991827 to special tool MB991824 and the personal computer.
4. Connect special tool MB991910 to special tool MB991824.
5. Connect special tool MB991910 to the data link connector.
6. Erase the DTC.
7. Turn the ignition switch to the "ON" position.
8. Check if the DTC is set.
9. Turn the ignition switch to the "LOCK" (OFF) position.
Q: Is the DTC set?
YES : Replace the appropriate ECU.
YES
NO