1. Introduction
This manual provides detailed instructions for the installation, operation, and maintenance of your First Safe KZ-078-8-20MM Parking Sensor Kit. Please read this manual thoroughly before installation and use to ensure proper function and safety.
Package Contents
The kit typically includes the following components:
- 1 x Control Box
- 8 x Rubber Detectors (sensors)
- 1 x Power Cable
- 1 x Buzzer Alarm
- 4 x Connection Cables (for sensors)
- 1 x Alloy Steel Hole Opener (drill bit)
- 2 x Stickers
- 1 x User Manual (this document)
Image: Overview of the parking sensor kit components including the control box, sensors, buzzer, and wiring.
2. Important Safety Notes
- The sensor of this product cannot be installed in a metal casing.
- This product cannot be installed in a 24V vehicle. It is designed for 12V systems.
- This product cannot be installed in a new energy vehicle (electric or hybrid).
- Before purchasing and installing, verify that the cable length is suitable for your vehicle.
- The control box is not waterproof; install it in a dry, protected location.
- Ensure there is no object interference inside the sensor installation position.
- Do not press the sensor core when installing; press the sensor shell and rotate.
3. Setup and Installation
Sensor Installation Location
Proper sensor placement is crucial for accurate detection. The kit supports various configurations (4, 6, or 8 sensors).
- Rear Sensors (4 sensors): Install on the rear bumper. Recommended height: 50-70 cm from the ground. Space sensors evenly across the bumper, typically dividing the width into thirds. Maintain 12-20 cm from the vehicle edges.
- Front Sensors (2 or 4 sensors): Install on the front bumper. Recommended height: 30-40 cm from the ground. Maintain 30-40 cm from the vehicle edges.
Image: Diagram showing recommended installation heights and spacing for front and rear sensors on a car.
Image: Diagram showing recommended rear sensor installation on a truck, with height 50-60cm and even spacing.
Sensor Installation Steps
- Mark Drilling Points: Carefully measure and mark the exact locations for each sensor on the bumper.
- Drill Holes: Use the provided alloy steel hole opener (drill bit) to drill holes. Ensure the drill bit matches the sensor diameter (20mm).
- Insert Sensors: Insert each sensor into its respective hole. Ensure the sensor is oriented correctly (some sensors may have an arrow indicating the top or direction). Push the sensor firmly until it sits flush with the bumper surface. Do not press the sensor core.
- Verify Detection Range: After installation, ensure no other parts of the vehicle (e.g., tow hitch, spare tire) fall into the immediate detecting range of the sensors, which could cause false detections.
Image: Visual guide for sensor installation, including drilling, insertion, and ensuring clear detection angles. Sensor dimensions: 23.7mm diameter, 12.8mm depth.
Wiring Diagram
Connect the components as per the following diagram:
- Control Box Power Line:
- Red wire: Connect to ACC (Accessory Power, +12V when ignition is on).
- Yellow wire: Connect to Reversing Light (+12V when reverse gear is engaged).
- White wire: Connect to Brake Light (+12V when brake pedal is pressed).
- Black wire: Connect to Gnd (Ground, vehicle chassis).
- Sensor Connections:
- Rear Sensors: Connect to interfaces A, B, C, D on the control box.
- Front Sensors: Connect to interfaces E, F, G, H on the control box. (For 6-sensor kits, typically EH or FG are used for front sensors).
- Buzzer/Display Connection: Connect the buzzer alarm to the designated port on the control box.
Image: Detailed wiring diagram showing connections for the control box, 8 sensors (4 front, 4 rear), buzzer, and power lines.
Image: Wiring diagram highlighting control box interfaces for front (EFGH) and rear (ABCD) sensors, and typical cable lengths.
4. Operating Instructions
The parking sensor system assists drivers in safely maneuvering their vehicle by detecting obstacles and providing audible alerts.
Detection Zones and Alarm Signals
The system uses a buzzer to indicate the distance to an obstacle:
| Distance to Obstacle | Audible Alarm |
|---|---|
| > 2.5 meters | No Beep (Safe Zone) |
| 1.5 - 2.5 meters | Beep (Long interval) |
| 1.0 - 1.5 meters | Beep-Beep (Medium interval) |
| 0.4 - 1.0 meters | Beep-Beep-Beep (Short interval) |
| < 0.4 meters | Continuous Beep (Danger Zone) |
Image: Visual representation of detection zones and corresponding beeping patterns.
System Activation
- Rear Sensors: Automatically activate when the vehicle is put into reverse gear.
- Front Sensors: Activate when the brake pedal is pressed. If the ACC line is connected, the front sensors will delay detection for approximately 10 seconds after the brake is released. If you do not require this delayed detection, you do not need to connect the ACC line.
- Reversing Priority: If you press the brake and shift into reverse gear at the same time, only the distance behind the car (rear sensors) will be displayed/indicated.
Image: Diagram illustrating front (0.3-0.8m) and rear (0-2.5m) detection ranges for a truck.
5. Maintenance
- Keep sensors clean from dirt, mud, snow, or ice for optimal performance. Clean gently with a soft cloth and mild detergent if necessary.
- Regularly check sensor connections for any signs of corrosion or damage.
- Ensure the control box remains in a dry environment.
6. Troubleshooting
- No Power/System Not Activating: Check all power connections (ACC, Reversing Light, Brake Light, Ground) to ensure they are secure and receiving power. Verify the vehicle's 12V power supply.
- Constant Beeping/False Alarms: Ensure sensors are clean and free from obstructions. Check sensor installation to confirm no part of the vehicle is within the immediate detection range. Verify sensors are not installed in metal casings.
- Inconsistent Detection: Clean sensors thoroughly. Check sensor wiring for loose connections or damage. Ensure sensors are installed at the recommended height and angle.
- Front Sensors Not Working: Check the connection to the brake light. If using the ACC delay feature, ensure the ACC wire is properly connected.
- Rear Sensors Not Working: Check the connection to the reversing light.
7. Specifications
| Feature | Specification |
|---|---|
| Model Name | KZ-078-8-20MM |
| Brand Name | First Safe |
| Type | Invisible (Buzzer Alarm) |
| Material | ABS+Rubber |
| Certification | E-Mark, RoHS |
| Sensor Diameter | 20mm |
| Rear Detection Distance | 0.3 - 2.5m |
| Rear Alarm Distance | 0.3 - 1.5m |
| Front Detection Distance | 0.3 - 0.8m |
| Front Alarm Distance | 0.3 - 0.8m |
| Power Line Length | About 0.8m |
| Sensor Cable Line Length | About 2.3m (Rear), About 6.3m (Front) |
| Display Cable Line Length | About 5m |
| Operating Voltage | 12V DC |
Image: Certifications for CE and RoHS compliance.
8. User Tips
- For optimal performance, ensure all sensors are installed at the same height on the bumper.
- When drilling, start with a small pilot hole to ensure accuracy before using the main drill bit.
- Route all cables carefully, securing them with zip ties to prevent them from snagging or being damaged by moving parts or heat.
- Test the system thoroughly in a safe, open area with known obstacles before relying on it in tight parking situations.
9. Warranty and Support
For any issues or support inquiries regarding your First Safe Parking Sensor Kit, please refer to your purchase documentation or contact the seller directly. Keep your proof of purchase for warranty claims.
A PDF version of the user manual is available for download from the product page for detailed diagrams and instructions.