B3797

Symptoms

• Central locking doesn't work
• Doors do not lock when button is pressed
• Door indicators do not work when locked
• There is no deadlock function

Causes

• Open or short circuit in wiring harness
• Central locking relay malfunction
• Problems with the door control unit
• Mechanical fault of door locks
• Corrosion of contacts in connectors

How to Fix

1. Carry out diagnostics with a scanner to clarify the nature of the malfunction
2. Check the integrity of the wiring harness between the control unit and the door locks
3. Test the central locking relay
4. Check the power and ground at the contacts of the control unit
5. Inspect the lock mechanism for mechanical damage
6. Clean or replace oxidized contacts in connectors

Related codes

Error B3797 by Vehicle Brand