The Polaris Sportsman 90 is a popular all-terrain vehicle (ATV) that is widely used for outdoor recreation and transportation. The CDI (Capacitor Discharge Ignition) system is a critical component of the ATV’s electrical system, as it is responsible for providing spark to the engine. In this article, we will discuss the wiring diagram for the Polaris Sportsman 90 CDI system, including its components, operation, and troubleshooting.
CDI System Components
The CDI system in the Polaris Sportsman 90 consists of several components, including:
| Component | Description |
|---|---|
| CDI Box | The CDI box is the main control unit for the system, responsible for receiving input signals from the engine and producing the spark output to the spark plug. |
| Stator | The stator is responsible for generating the electrical current that powers the CDI system. |
| Trigger Coil | The trigger coil is responsible for producing the signal that triggers the CDI box to produce the spark output. |
| Ignition Coil | The ignition coil amplifies the spark output produced by the CDI box and transfers it to the spark plug. |
Each of these components must be functioning properly for the CDI system to operate correctly.
CDI System Operation
The CDI system in the Polaris Sportsman 90 operates as follows:
- The stator generates an electrical current that is sent to the CDI box.
- The trigger coil produces a signal that is sent to the CDI box.
- The CDI box uses the input signals from the stator and trigger coil to determine the correct timing and intensity of the spark output.
- The CDI box sends the spark output to the ignition coil, which amplifies it and sends it to the spark plug.
- The spark ignites the fuel in the engine, causing combustion and powering the ATV.
CDI System Troubleshooting
If the CDI system in your Polaris Sportsman 90 is not functioning properly, there may be several potential causes. Some common issues and their solutions include:
No Spark Output
If there is no spark output from the CDI system, it may be due to a fault in the CDI box, trigger coil, or ignition coil. You can test these components using a multimeter to check for proper resistance and continuity. Replace any faulty components as needed.
Weak Spark Output
If the spark output from the CDI system is weak, it may be due to a faulty ignition coil or spark plug. Check these components for proper resistance and continuity, and replace as needed. You should also check the spark plug gap and ensure it is set to the correct specifications.
Inconsistent Spark Output
If the spark output from the CDI system is inconsistent, it may be due to a fault in the trigger coil or stator. Check these components for proper resistance and continuity, and replace as needed.
Conclusion
The CDI system is a critical component of the Polaris Sportsman 90 ATV’s electrical system, responsible for providing spark to the engine. By understanding its components, operation, and troubleshooting, you can ensure that your ATV is running smoothly and efficiently.
FAQ
What is a CDI system?
A CDI (Capacitor Discharge Ignition) system is an electronic ignition system used in many small engines, including ATVs, motorcycles, and snowmobiles. The CDI system stores electrical energy in a capacitor, which is then discharged to produce a high-voltage spark at the spark plug.
What are the components of a CDI system?
The components of a CDI system may vary depending on the specific application, but typically include a CDI box, stator, trigger coil, and ignition coil.
How does a CDI system work?
A CDI system works by using input signals from the stator and trigger coil to determine the correct timing and intensity of the spark output. The CDI box then sends the spark output to the ignition coil, which amplifies it and sends it to the spark plug.
What are some common issues with CDI systems?
Some common issues with CDI systems include no spark output, weak spark output, and inconsistent spark output. These issues may be due to faults in the CDI box, stator, trigger coil, or ignition coil.
How do I troubleshoot a CDI system?
To troubleshoot a CDI system, you should test each of its components for proper resistance and continuity using a multimeter. If you find any faulty components, you should replace them as needed.
