Speed Code 4 Installation Guide

You’ll need the following tools to install Speed Code 4:

• A Curtis programmer (model 1313 or 1314 recommended).
• A screwdriver to access the controller.
• Your golf cart’s manual for reference.

Ensure the programmer is compatible with your cart’s controller (e.g., Curtis 1510 or 1515). If you don’t own a programmer, many golf cart dealers offer rental options, or you can purchase one online for $300-$500.

Locate the controller on your Club Car, typically under the rear access panel:

• Turn off the cart and disconnect the battery for safety—locate the main battery disconnect switch and set it to OFF.
• Remove the rear panel screws using a screwdriver (usually 4-6 screws, depending on the model).
• Locate the Curtis controller—it’s a small rectangular box with wiring, often mounted near the motor.

Tip: If you’re having trouble finding the controller, refer to your Club Car manual or look for a diagram online specific to your model year.

You’ll need two serial numbers to proceed:

• Cart VIN: Found on a sticker under the driver’s seat, in the glove box, or near the steering column.
• Controller Serial Number: Located on the controller itself—look for a sticker on the side or top of the unit.

Write these down—they may be required by your dealer to obtain the Speed Code 4 parameters. Some dealers may also need the cart’s model year to ensure compatibility.

Connect the Curtis programmer to the controller:

• Locate the programming port on the controller (usually a 4-pin Molex Mini-Fit Jr. connector, often covered by a rubber cap).
• Plug in the Curtis programmer securely—ensure the connection is firm to avoid errors.
• Power on the programmer—it should display the controller’s current settings, such as the speed code (likely set to 2 or 3 by default).

Tip: If the programmer doesn’t connect, check the battery connection and ensure the programmer’s firmware is up to date.

Using the Curtis programmer, input the Speed Code 4 settings:

• Navigate to the "Speed Setting" menu on the programmer using the arrow keys.
• Select "4" to set the controller to Speed Code 4—this adjusts the RPM limit to achieve 19.6 MPH.
• Save the settings by pressing the "Save" or "Enter" button on the programmer (refer to the programmer’s manual for exact steps).
• If your dealer provided specific parameters (e.g., custom RPM values), input those instead.

Note: Some carts may require additional settings adjustments (e.g., acceleration rate) to optimize performance—consult your dealer if you’re unsure.

After programming, test your cart to confirm the speed increase:

• Reconnect the battery and turn on the cart—set the main battery switch back to ON.
• Take the cart to a flat, open area (e.g., a golf course, empty lot, or private road).
• Accelerate to full speed—you should reach 19.6 MPH with stock tires and a 48V system, measured with a GPS app or speedometer.
• If the speed doesn’t increase, double-check the programmer settings or consult a dealer.

Tip: Ensure your tires are properly inflated (typically 18-22 PSI) and your battery is fully charged for an accurate test.

If the Curtis programmer doesn’t connect to the controller:

• Check the connection cable—ensure it’s securely plugged into the 4-pin port.
• Verify the battery is connected and the cart is powered on (some programmers require power).
• Update the programmer’s firmware—check the manufacturer’s website for updates.

If your cart doesn’t reach 19.6 MPH after programming:

• Double-check the speed setting—ensure it’s set to "4" in the programmer.
• Verify your battery charge—a low battery (below 80%) can reduce speed.
• Check for error codes on the programmer—some controllers may need additional settings adjustments.
• Ensure your tires are stock size (18 inches)—larger or smaller tires can affect speed.

If your cart accelerates slowly or struggles on hills:

• Speed Code 4 prioritizes top speed over torque—this is normal but can be adjusted.
• Use the Curtis programmer to tweak the acceleration rate (increase the "Accel Rate" setting).
• Check your motor condition—an older motor may struggle with the higher RPMs.