Speed control system (tempostat) — general information and testing (Honda Civic 6)

The cruise control allows you to automatically maintain the selected speed of the car. The cruise control servomotor is located in the engine compartment, attached to the left wing splash guard and connected to the throttle rod by a cable. The main components of the system are the servomotor, the brake light switch sensor, control switches, speed sensors and actuator relays. Checking individual functions of the system requires the use of special diagnostic equipment and its implementation is beyond the skill of the average amateur mechanic. Below is a description of only the most general check procedures that allow you to identify the causes of the most typical cruise control failures.

1. Locate the cruise control fuse and check its condition (see Fuses - General Information).

2. The activation of the brake light switch sensor that responds to the foot brake pedal should result in the cruise control being switched off. Ask an assistant to depress the brake pedal and make sure that the brake lights are working properly.

3. If the brake lights do not respond to pressing the pedal, find out the reason for the failure and repeat the check of the cruise control function.



4. Check the condition of the drive cable running from the servo/amplifier assembly to the cruise control (see accompanying illustration) to the throttle linkage. Replace a damaged or worn cable.



5. The operation of the tempostat is based on monitoring the speed of the vehicle. The speed sensor is placed in the transmission, a description of its testing is given in Chapter Engine management systems of this Guide.

6. Perform a road test of the vehicle. If the malfunction of the cruise control system cannot be eliminated during the corrections made, take the vehicle to a service station for a more detailed diagnosis of the system using special equipment.