2. The locks are controlled by bi-directional electric valves located in the doors. Lock sensors have two working positions: Lock and Unlock (lock and unlock). Pulses are sent from the switches to the VSM control unit, from where voltage is then supplied to the electric valves of the locks.
3. If after carrying out the described checks the fault remains undetected, take the vehicle to a service station for in-depth diagnostics.
4. Always start diagnosing by checking the condition of the protective elements of the circuit. On some vehicles, this system has multiple fuses and circuit breakers. Refer to the electrical diagrams at the end of this chapter.
5. Make sure there is power to the switches. If there is no power, examine the wiring between the fuse box and the switches for an open or short circuit.
6. If power is present, examine the switch for an internal open. If the internal circuit is open in either of the two switch positions, replace the switch. To remove the switch, you need to pry it with a special flat tool and remove the door/window switch panel (see chapter 11).
7. If the switch circuit closes, examine the wiring in the area from the switch to the lock solenoid valve.
8. If one of all switches does not work, remove the trim panel of the corresponding door (see chapter 11) and make sure there is voltage on the solenoid valve when the switch is in operating position; in the Lock position, the presence of voltage should be noted on one of the wires. In the Unlock position, the current should flow through one wire, and in the Lock position, it should flow differently.
9. If voltage supply to the inoperative solenoid valve is confirmed, replace it.
10. If the solenoid valve does not operate and there is no voltage supplied to it, check the relay circuit for an open or short circuit in the wiring connecting the lock solenoid valve and the relay.
Note: as a rule, the wires break in the area between the door and the body (when opening and closing the door, the wires become bent, which ultimately leads to their breakage).
11. On the described vehicles, the automatic locking system is controlled from the BCM control unit. If during the described checks the cause of the malfunction remains unidentified, contact the company station for diagnostics using a special scanner, which can be used to read the fault codes contained in the electronic memory of the BCM.
Keyless Entry System
12. One of the elements of the system is the remote control, from which control signals are sent to the receiver. The receiver sends signals to the door lock actuators.
13. If the remote control does not operate at a distance of 3 m, replace its battery. The normal operating range of the remote control is about 9 m.
14. The components of the remote control housing are separated using a small screwdriver.
15. The remote control is powered by 3-volt lithium elements, made of CR2032.
16. Connect and fasten the components of the remote control body.