Diono Booster Seat Manual

The Diono Booster Seat is a high-back booster seat designed for children 40-120 lbs, featuring steel frame construction, energy-absorbing EPS foam, adjustable headrest with 12 positions, 3-position recline, side impact protection, machine-washable fabric, LATCH system compatibility, cup holders, and meets or exceeds FMVSS 213 safety standards. Below are key sections for safety, features, installation, setup, operation, and troubleshooting.

1. Features at a Glance 2. Installation 3. First-Time Setup 4. Specifications 5. Controls and Adjustments 6. Proper Positioning 7. Maintenance & Cleaning 8. Safety Features 9. Regulatory Information 10. Troubleshooting

Features at a Glance

Key components: Steel frame construction, adjustable headrest, 3-position recline, side impact protection, LATCH connectors, cup holders, machine-washable fabric cover.

Feature	Description
Steel frame	Provides superior strength and durability
Adjustable headrest	12-position adjustment for growing children
3-position recline	Allows for comfortable seating positions
Side impact protection	Deep wings and EPS foam for enhanced safety
LATCH system	Easy installation and secure attachment
Cup holders	Removable for easy cleaning
Machine-washable fabric	Easy to clean and maintain
Seat belt guides	Proper positioning of vehicle seat belt
Weight capacity	40-120 lbs (18-54 kg)
Height range	Up to 57 inches (145 cm)

Installation

Unpack and inspect all components. Read manual completely before installation.

Position booster seat: Place in vehicle seat facing forward.
Attach LATCH connectors: Connect lower anchors to vehicle LATCH points.
Tighten LATCH straps: Pull straps tight until seat is secure with minimal movement.
Position child: Place child in seat and fasten vehicle seat belt.
Adjust headrest: Ensure headrest is at or above child's shoulders.

WARNING! Always use vehicle seat belt with booster seat. Ensure seat is securely installed before each use.

First-Time Setup

Prepare booster seat for initial use with proper adjustments.

Remove packaging: Remove all plastic wraps and packaging materials.
Install cup holders: Attach cup holders to designated slots.
Adjust headrest: Set to lowest position for initial fitting.
Check recline: Set to most upright position for proper belt fit.
Test installation: Ensure seat moves less than 1 inch side-to-side and front-to-back.

CAUTION! Do not use after-market accessories not approved by Diono. Always follow vehicle manufacturer's instructions.

Specifications

Weight Range: 40-120 lbs (18-54 kg)
Height Range: Up to 57 inches (145 cm)
Seat Dimensions: 20.5" x 18.5" x 25.5"
Frame Material: Steel alloy with energy-absorbing foam
Cover Material: Machine-washable polyester fabric
Headrest Positions: 12 adjustable positions
Recline Positions: 3 positions
Safety Standards: FMVSS 213, meets or exceeds all federal requirements
Warranty: Limited 10-year warranty

Controls and Adjustments

Headrest adjustment: Press button on back of seat and slide headrest up or down. Recline adjustment: Use lever on front base to select one of three positions. LATCH connectors: Red release buttons for easy removal. Cup holders: Snap into place on either side of seat.

Proper Fit: Lap belt should lie across upper thighs, shoulder belt should cross chest and shoulder.

Headrest should be at or above child's ears when in highest position. Shoulder belt guide should position belt at child's shoulder level.

Proper Positioning

Correct positioning ensures maximum safety and comfort.

Child positioning: Child should sit upright with back against seat back.
Lap belt position: Should lie low across hips and upper thighs.
Shoulder belt position: Should cross chest and shoulder, not neck.
Headrest height: Top of ears should not exceed top of headrest.
Leg position: Knees should bend comfortably at seat edge.

Tip: Regularly check belt positioning as child grows. Adjust headrest accordingly.

Maintenance & Cleaning

Regular maintenance ensures long-lasting performance and safety.

Fabric cleaning: Remove cover and machine wash in cold water, gentle cycle.
Plastic parts: Wipe with damp cloth and mild soap solution.
Cup holders: Remove and wash with warm soapy water.
Inspection: Regularly check for cracks, loose parts, or worn components.
Storage: Store in clean, dry area when not in use.

WARNING! Do not bleach or dry clean fabric. Do not use harsh chemicals. Always reassemble completely before use.

Safety Features

Side Impact Protection: Deep wings with energy-absorbing EPS foam. Steel Frame: Provides rigid structure and durability. Adjustable Headrest: Grows with child for proper fit. LATCH System: Secure attachment to vehicle. Seat Belt Guides: Ensure proper belt positioning.

Regulatory Information

FMVSS 213 Compliance: Meets or exceeds all Federal Motor Vehicle Safety Standards. Manufactured under strict quality control standards. Copyright © 2025 Diono; all rights reserved. For customer support, visit www.diono.com or contact 1-800-XXX-XXXX. This child restraint system conforms to all applicable federal motor vehicle safety standards.

Troubleshooting

Symptom	Possible Cause	Corrective Action
Seat moves excessively	Loose LATCH/seat belt	Tighten LATCH straps; ensure seat belt is properly routed and tightened.
Headrest won't adjust	Obstruction/mechanism	Check for obstructions; press adjustment button firmly while sliding.
Belt positioning issues	Incorrect headrest height	Adjust headrest so belt guides position shoulder belt correctly.
Child uncomfortable	Incorrect recline position	Adjust recline to one of three positions for better comfort.
Cup holders loose	Improper installation	Remove and reinstall, ensuring they snap securely into place.

Inspection: Regularly check for wear, damage, or expired components.

Service: 1-800-XXX-XXXX; www.diono.com