Tern GSD Common Problems

Specifications

Features

• Neighborhood
• Cargo
• Urban
• Commuter
• Headlight
• Integrated Taillight
• Fenders
• Rear Rack
• Tool-free adjustable stem
• Suspension seat post
• Kickstand

Causes of Common Problems with the Tern GSD

In this section, we will explore the potential causes behind common problems experienced with the Tern GSD. By identifying these causes, we can better understand how to address and resolve them effectively.

Stay tuned as we delve into specific issues and provide solutions to ensure a smoother and more enjoyable riding experience with your Tern GSD.

Battery Not Holding Charge – Tern GSD

• Description of the problem: The battery of your Tern GSD electric bike is not holding its charge as it should, resulting in reduced riding time.
• Cause of the problem: This issue can arise due to several factors, including overuse, improper charging habits, or battery degradation over time.
• Troubleshooting step-by-step:
  1. Start by checking if the battery is properly connected to the bike.
  2. Ensure that the charger is functioning correctly and securely plugged into a power source.
  3. Try charging the battery fully and then discharging it completely a few times to recalibrate its capacity.
  4. If the problem persists, consider contacting the manufacturer for a possible battery replacement or professional diagnosis.

Motor Not Functioning – Tern GSD

• Description of the problem: The motor of your Tern GSD electric bike fails to engage or function properly, hindering your riding experience.
• Cause of the problem: Motor malfunctions can occur due to wiring issues, overheating, or software glitches.
• Troubleshooting step-by-step:
  1. Inspect the motor wiring for any loose connections or damage.
  2. Allow the motor to cool down if it has been subjected to excessive use.
  3. Reset the motor controller or update its firmware if applicable.
  4. If the problem persists, seek assistance from a qualified technician or contact the manufacturer for support.

Brake Failure – Tern GSD

• Description of the problem: The brakes on your Tern GSD electric bike are not functioning properly, posing a safety risk during rides.
• Cause of the problem: Brake issues can stem from worn brake pads, hydraulic fluid leaks, or misaligned brake calipers.
• Troubleshooting step-by-step:
  1. Check the brake pads for wear and replace them if necessary.
  2. Inspect the brake lines and calipers for any signs of leakage or damage.
  3. Adjust the brake calipers to ensure proper alignment with the brake rotor.
  4. If the problem persists, consider bleeding the brake system or consulting a professional bike mechanic for assistance.

Electrical Malfunctions – Tern GSD

• Description of the problem: Your Tern GSD electric bike experiences various electrical malfunctions, such as intermittent power loss or erratic behavior.
• Cause of the problem: Electrical issues may arise from damaged wiring, loose connections, or component failures within the electronic system.
• Troubleshooting step-by-step:
  1. Inspect the wiring harness and connectors for any signs of damage or corrosion.
  2. Tighten any loose connections and ensure all electrical components are securely attached.
  3. Test individual electronic components, such as the controller and display, for proper functionality.
  4. If necessary, seek professional assistance for diagnosing and repairing complex electrical issues.

Noise or Vibration While Riding – Tern GSD

• Description of the problem: Your Tern GSD electric bike produces unusual noises or vibrations during rides, affecting ride quality and comfort.
• Cause of the problem: Noise and vibration issues can result from loose components, worn bearings, or improper wheel alignment.
• Troubleshooting step-by-step:
  1. Inspect the bike frame, handlebars, and other components for any loose bolts or fasteners.
  2. Check the wheel bearings for signs of wear and replace them if necessary.
  3. Ensure proper tire inflation and wheel alignment to minimize vibrations.
  4. If the problem persists, consult a bike mechanic to identify and address the underlying cause.

Motor Overheating – Tern GSD

Description of the problem: The motor of the Tern GSD electric bike overheats during extended or demanding rides, leading to performance degradation or complete shutdown.

Cause of the problem: Overloading the motor or riding in excessively hot weather can cause overheating. Additionally, inadequate ventilation around the motor can exacerbate the issue.

Troubleshooting step-by-step:

• 1. Allow the motor to cool down by stopping the bike and letting it rest for a while.
• 2. Avoid heavy loads or demanding terrains that could strain the motor.
• 3. Ensure proper ventilation around the motor by keeping the bike’s vents unobstructed.
• 4. Consider installing an auxiliary cooling system or upgrading to a motor with higher heat tolerance.

Battery Drainage – Tern GSD

Description of the problem: The battery of the Tern GSD electric bike drains quickly or fails to hold a charge, reducing the bike’s range and usability.

Cause of the problem: Battery drainage can occur due to various factors such as aging batteries, improper charging habits, or electronic malfunctions.

Troubleshooting step-by-step:

• 1. Check for loose connections or damaged cables between the battery and the bike’s electrical system.
• 2. Verify that the charger is functioning correctly and that the battery is charging fully.
• 3. Avoid exposing the battery to extreme temperatures, as this can degrade its performance over time.
• 4. If the battery continues to drain quickly, consider replacing it with a new one or seeking professional assistance for diagnostics and repairs.

Brake Squealing – Tern GSD

Description of the problem: The brakes of the Tern GSD electric bike emit loud squealing noises during braking, which can be annoying and indicate potential issues with braking performance.

Cause of the problem: Brake squealing is often caused by contaminated brake pads, misaligned brake calipers, or worn brake components.

Troubleshooting step-by-step:

• 1. Clean the brake pads and rotors with rubbing alcohol to remove any contaminants or debris.
• 2. Check for proper alignment of the brake calipers and adjust them if necessary to ensure even contact with the brake pads.
• 3. Inspect the brake pads for wear and replace them if they are excessively worn down.
• 4. Lubricate the brake pivots and contact points with appropriate bike lubricant to reduce friction and noise.

Electrical Malfunctions – Tern GSD

Description of the problem: The Tern GSD electric bike experiences intermittent or persistent electrical malfunctions, such as sudden power loss, unresponsive controls, or error messages on the display.

Cause of the problem: Electrical malfunctions can stem from various sources, including loose connections, damaged wiring, software glitches, or component failures.

Troubleshooting step-by-step:

• 1. Inspect all electrical connections and wiring harnesses for signs of damage or looseness, and secure them properly.
• 2. Update the bike’s firmware and software to the latest versions, as manufacturers often release patches to address known issues.
• 3. Reset the bike’s electrical system by disconnecting the battery and waiting for a few minutes before reconnecting it.
• 4. If the problem persists, consult the bike’s user manual for specific troubleshooting steps or contact the manufacturer’s customer support for assistance.

Noise from Drive Train – Tern GSD

Description of the problem: The drive train of the Tern GSD electric bike emits unusual noises during pedaling or motor engagement, such as grinding, clicking, or rattling sounds.

Cause of the problem: Drive train noises can result from issues like misaligned gears, worn chainrings or cogs, loose components, or insufficient lubrication.

Troubleshooting step-by-step:

• 1. Check the alignment of the gears and adjust them as needed to ensure smooth engagement and minimal noise.
• 2. Inspect the chainrings, cogs, and chain for signs of wear or damage, and replace them if necessary.
• 3. Tighten any loose bolts or fasteners in the drive train components, including the crankset, pedals, and derailleur.
• 4. Clean and lubricate the chain and other moving parts regularly to reduce friction and noise.

Display Malfunction – Tern GSD

Description of the problem: The display unit of the Tern GSD electric bike experiences issues such as flickering, unresponsiveness, or displaying incorrect information.

Cause of the problem: Display malfunctions can occur due to damaged display units, loose connections, software bugs, or compatibility issues with other bike components.

Troubleshooting step-by-step:

• 1. Check for loose connections between the display unit and the bike’s electrical system, and secure them properly.
• 2. Update the display firmware to the latest version, if available, to address any software bugs or compatibility issues.
• 3. Reset the display settings to their default values and recalibrate the unit according to the manufacturer’s instructions.
• 4. If the problem persists, consider replacing the display unit or seeking professional assistance for diagnosis and repairs.

Chain Slippage – Tern GSD

Description of the problem: The chain of the Tern GSD electric bike slips or skips gears unexpectedly during pedaling, leading to poor performance and potential safety hazards.

Cause of the problem: Chain slippage can result from worn chainrings or cogs, improper chain tension, misaligned gears, or a damaged chain.

Troubleshooting step-by-step:

• 1. Inspect the chain, chainrings, and cogs for signs of wear or damage, and replace any worn components accordingly.
• 2. Adjust the chain tension according to the manufacturer’s specifications to ensure proper engagement with the gears.
• 3. Check the alignment of the gears and adjust them as needed to prevent chain slippage.
• 4. Lubricate the chain and other moving parts regularly to reduce friction and improve shifting performance.

Throttle Inoperable – Tern GSD

Description of the problem: The throttle of the Tern GSD electric bike fails to engage or respond to input, preventing riders from accessing motor assistance when needed.

Cause of the problem: Throttle inoperability can be caused by issues such as loose connections, damaged throttle components, or software glitches.

Troubleshooting step-by-step:

• 1. Check for loose or damaged connections between the throttle unit and the bike’s electrical system, and secure them properly.
• 2. Test the throttle unit on a different bike or replace it with a known working unit to rule out hardware issues.
• 3. Update the bike’s firmware and software to the latest versions, as manufacturers often release patches to address known issues.
• 4. If the throttle continues to be inoperable, consult the bike’s user manual for specific troubleshooting steps or contact the manufacturer’s customer support for assistance.

Wheel Misalignment – Tern GSD

Description of the problem: The wheels of the Tern GSD electric bike are misaligned, leading to handling issues, uneven tire wear, and potential safety hazards.

Cause of the problem: Wheel misalignment can occur due to improper installation, loose axle nuts, bent axles, or damage to the frame or fork.

Troubleshooting step-by-step:

• 1. Check the alignment of the wheels by measuring the distance between the rims and the frame or fork at multiple points.
• 2. Tighten the axle nuts securely to ensure proper wheel alignment and prevent movement during riding.
• 3. Inspect the axles for signs of bending or damage, and replace them if necessary to restore proper alignment.
• 4. If the misalignment persists, consult a professional bike mechanic or contact the manufacturer for further assistance.

Sensor Malfunction – Tern GSD

Description of the problem: The sensors of the Tern GSD electric bike, such as the pedal-assist sensor or torque sensor, fail to detect input or provide inaccurate feedback, affecting motor assistance and ride performance.

Cause of the problem: Sensor malfunctions can occur due to damaged sensors, loose connections, software bugs, or interference from external factors.

Troubleshooting step-by-step:

• 1. Inspect the sensors for signs of damage or corrosion, and replace any faulty sensors as needed.
• 2. Check for loose connections between the sensors and the bike’s electrical system, and secure them properly.
• 3. Update the bike’s firmware and software to the latest versions, as manufacturers often release patches to address sensor-related issues.
• 4. If the sensor malfunction persists, consult the bike’s user manual for specific troubleshooting steps or contact the manufacturer’s customer support for assistance.

Battery Not Charging – Tern GSD

Description of the problem: The battery of the Tern GSD electric bike does not charge when connected to the charger, preventing riders from using the bike due to insufficient power.

Cause of the problem: Battery not charging can be caused by issues such as a faulty charger, damaged charging port, loose connections, or a defective battery.

Troubleshooting step-by-step:

• 1. Check the charger for any signs of damage or malfunction, and try using a different charger to rule out charger-related issues.
• 2. Inspect the charging port on the bike for debris or damage, and clean it thoroughly to ensure proper connection with the charger.
• 3. Verify that the charger is properly plugged into a functioning power outlet, and try using a different outlet if necessary.
• 4. If the battery still does not charge, consider replacing the battery or seeking professional assistance for diagnosis and repairs.

Handlebar Shaking – Tern GSD

Description of the problem: The handlebars of the Tern GSD electric bike shake or vibrate uncontrollably during riding, causing discomfort and potential safety hazards.

Cause of the problem: Handlebar shaking can result from issues such as loose headset bearings, misaligned handlebars, worn components, or improper tire inflation.

Troubleshooting step-by-step:

• 1. Check the headset bearings for proper adjustment and tighten them if necessary to eliminate play and stabilize the handlebars.
• 2. Ensure that the handlebars are aligned properly with the front wheel and adjust them as needed to achieve a straight and stable position.
• 3. Inspect the handlebar grips, stem, and other components for signs of wear or damage, and replace any worn parts to improve stability.
• 4. Verify that the tires are inflated to the recommended pressure and adjust as needed to minimize vibrations transmitted to the handlebars.

No Motor Assistance – Tern GSD

Description of the problem: The motor of the Tern GSD electric bike fails to provide assistance when pedaling, leaving riders to rely solely on their own power and hindering the bike’s performance.

Cause of the problem: Lack of motor assistance can be caused by issues such as a drained battery, faulty motor controller, damaged wiring, or sensor malfunctions.

Troubleshooting step-by-step:

• 1. Check the battery charge level and recharge if necessary to ensure sufficient power for motor assistance.
• 2. Inspect the motor controller and wiring harnesses for signs of damage or loose connections, and repair or replace as needed.
• 3. Test the sensors, such as the pedal-assist sensor or torque sensor, for proper function and replace any faulty sensors if necessary.
• 4. If motor assistance is still not available, consult the bike’s user manual for specific troubleshooting steps or contact the manufacturer’s customer support for assistance.

Unresponsive Brakes – Tern GSD

Description of the problem: The brakes of the Tern GSD electric bike are unresponsive or sluggish when engaged, compromising rider safety and control.

Cause of the problem: Unresponsive brakes can result from issues such as contaminated brake pads, air in the brake lines, worn brake components, or misadjusted brake calipers.

Troubleshooting step-by-step:

• 1. Check the brake pads and rotors for contaminants such as oil or debris, and clean them thoroughly to restore proper braking performance.
• 2. Bleed the brake lines to remove any air bubbles and ensure optimal hydraulic pressure for responsive braking.
• 3. Inspect the brake pads and rotors for signs of wear or damage, and replace them if necessary to improve braking effectiveness.
• 4. Adjust the brake calipers and brake levers according to the manufacturer’s specifications to ensure smooth and consistent braking action.

Loose Bolts and Fasteners – Tern GSD

Description of the problem: Various bolts and fasteners on the Tern GSD electric bike become loose over time, leading to rattling noises, reduced stability, and potential safety hazards.

Cause of the problem: Loose bolts and fasteners can result from normal wear and tear, inadequate tightening during assembly or maintenance, or vibration from riding.

Troubleshooting step-by-step:

• 1. Inspect all bolts and fasteners on the bike, including those securing components such as the handlebars, stem, seatpost, and fenders.
• 2. Use the appropriate tools to tighten any loose bolts and fasteners to the recommended torque specifications.
• 3. Apply a thread-locking compound to critical fasteners to prevent them from loosening due to vibration.
• 4. Periodically check and retighten bolts and fasteners as part of regular bike maintenance to ensure optimal performance and safety.

Sudden Power Loss – Tern GSD

Description of the problem: The Tern GSD electric bike experiences sudden and unexpected power loss while riding, causing the motor to stop functioning abruptly.

Cause of the problem: Sudden power loss can be caused by issues such as a drained battery, overheating motor, faulty wiring, or electronic malfunctions.

Troubleshooting step-by-step:

• 1. Check the battery charge level and recharge if necessary to ensure sufficient power for motor assistance.
• 2. Allow the motor to cool down by stopping the bike and letting it rest for a while if overheating is suspected.
• 3. Inspect the wiring harnesses and connections for signs of damage or loose connections, and repair or replace as needed.
• 4. Reset the bike’s electrical system by disconnecting the battery and waiting for a few minutes before reconnecting it.

Uneven Pedal Assistance – Tern GSD

Description of the problem: The pedal-assist system of the Tern GSD electric bike provides uneven or inconsistent levels of assistance, leading to unpredictable riding experiences.

Cause of the problem: Uneven pedal assistance can result from issues such as sensor malfunctions, software glitches, improper calibration, or low battery voltage.

Troubleshooting step-by-step:

• 1. Test the sensors, such as the pedal-assist sensor or torque sensor, for proper function and replace any faulty sensors if necessary.
• 2. Update the bike’s firmware and software to the latest versions, as manufacturers often release patches to address pedal-assist issues.
• 3. Recalibrate the pedal-assist system according to the manufacturer’s instructions to ensure consistent performance.
• 4. Monitor the battery voltage and recharge if necessary to maintain optimal pedal-assist functionality.

Chain Jamming – Tern GSD

Description of the problem: The chain of the Tern GSD electric bike gets jammed or stuck between the chainrings or cogs, preventing smooth pedaling and potentially causing damage to the drivetrain.

Cause of the problem: Chain jamming can occur due to issues such as improper chain tension, misaligned gears, worn components, or debris lodged in the drivetrain.

Troubleshooting step-by-step:

• 1. Adjust the chain tension according to the manufacturer’s specifications to prevent excessive slack or tightness.
• 2. Check the alignment of the gears and adjust them as needed to ensure smooth engagement and minimize chain jamming.
• 3. Inspect the chain, chainrings, and cogs for signs of wear or damage, and replace any worn components to prevent chain jamming.
• 4. Clean the drivetrain regularly to remove debris and lubricate the chain and other moving parts to reduce friction and prevent chain jamming.

Excessive Noise from Motor – Tern GSD

Description of the problem: The motor of the Tern GSD electric bike emits excessive noise during operation, such as grinding, whirring, or buzzing sounds, which can be disruptive and indicate potential issues.

Cause of the problem: Excessive motor noise can result from issues such as worn bearings, misalignment, loose components, or internal motor damage.

Troubleshooting step-by-step:

• 1. Inspect the motor housing for signs of damage or wear and listen for any abnormal sounds while the motor is running.
• 2. Check the motor bearings for smooth rotation and replace them if they show signs of wear or damage.
• 3. Tighten any loose bolts or fasteners in the motor assembly and ensure that all components are securely attached.
• 4. If the excessive noise persists, consider consulting a professional bike mechanic or contacting the manufacturer for further diagnosis and repairs.

Intermittent Power Cutouts – Tern GSD

Description of the problem: The Tern GSD electric bike experiences intermittent power cutouts, where the motor stops providing assistance unexpectedly, disrupting the riding experience.

Cause of the problem: Intermittent power cutouts can be caused by issues such as loose connections, overheating components, sensor malfunctions, or electrical interference.

Troubleshooting step-by-step:

• 1. Check all electrical connections on the bike, including those between the battery, motor, controller, and sensors, and secure them properly.
• 2. Allow the bike to cool down by stopping and resting if overheating is suspected, and avoid prolonged or heavy usage in hot conditions.
• 3. Test the sensors for proper function and replace any faulty sensors if necessary to ensure consistent power delivery.
• 4. Minimize potential sources of electrical interference, such as nearby electronic devices or power lines, to reduce the likelihood of power cutouts.