Models without remote control
The system's operation is based on the activation of individual activators of each car door lock. The system consists of control switches, door activators and connecting electrical wiring. Diagnostics of lock failures is limited to checking the condition of the contact connections of the electrical circuit and the proper operation of the door activators.
The operation of the single lock occurs due to the activation of bidirectional electromagnets located in the car doors. The control switch has two positions: LOCKED and OPEN. On later models equipped with a remote control for door activators, there is also a control module that supplies voltage to the lock activators upon command from the remote control. When activated, the switch sends a ground signal to the door lock control unit, resulting in the corresponding switching of the activators. Depending on the initial position of the switch, when it is switched, the control unit simply changes the polarity of the current supplied to the electromagnets. On models without a remote control, the switches act directly on the activators.
If the cause of the system failure cannot be found by performing the following checks, take the vehicle to a service station for a more complete diagnosis.
First of all, always check the circuit protection status. On the models in question, the circuit protection is provided by fuses 6 and 13, placed in the mounting block located on the right under the instrument panel, and fuse 9, in the left mounting block.
Switch the control switches in both directions with the engine off. Listen for the clicking sound of the relay.
If there are no clicks, check the correctness of the voltage supply to the switches. If there is no voltage, check the condition of the wiring in the section of the circuit between the mounting block and the corresponding switch.
If there is voltage but no clicking sound, check the continuity of the switch in both positions. Defective switches must be replaced.
If the switch is OK, check the conductivity of the wiring in the section of the circuit between the switch and the electromagnet of the corresponding activator. Repair the damaged wiring.
If only one of the actuators fails, remove the interior trim panel from the corresponding door (see Chapter Body) and check the correctness of the voltage supply to the actuator electromagnet by switching the control switch. One of the wires should be powered in one of the switch positions, the second in the other.
If the voltage supply is correct, replace the solenoid.
Note: Most often, the wire breaks in the area between the door and the body panel.
Models with remote control
In these models, the remote control generates a long-wave signal in the infrared frequency range, which is received and recognized by the system control module. Based on the signal from the remote control, the module generates a command to activate the door lock actuators.
The batteries of the remote control must be replaced when the LED assembly built into the remote control housing stops lighting up when the control button is pressed.
The remote control housing is divided into two halves by prying it up with a small screwdriver.
The replacement battery should be a CR 2025 lithium battery.
Make sure that the housing latches are securely locked.
[Original published on this resource: HONDABOOK.ru]