2020 Q50 Paddle Shifters Kit]

The 2020 Infiniti Q50 offers a blend of luxury and performance, and for many drivers, the paddle shifters are a key element of that experience. These shifters allow for a more engaging and sporty driving feel, providing manual control over gear changes without a clutch pedal. However, like any automotive component, paddle shifters can experience issues. This article aims to provide car owners and mechanics with practical insights into maintaining, troubleshooting, and addressing common problems associated with 2020 Q50 paddle shifter kits.

Understanding Your Q50's Paddle Shifters

Before diving into troubleshooting, it's essential to understand how paddle shifters work within the Q50's transmission system. They are essentially electronic switches that send signals to the transmission control module (TCM). The TCM then interprets these signals and commands the transmission to upshift or downshift accordingly. The system relies on several factors including:

• Paddle Shifter Hardware: The paddles themselves, the wiring connecting them to the steering column, and the internal switches.
• Steering Column Clock Spring: This crucial component maintains electrical connectivity to the steering wheel controls while allowing the wheel to rotate.
• Transmission Control Module (TCM): The brain of the operation, responsible for executing gear changes based on paddle inputs.
• Transmission Solenoids: These electronically controlled valves within the transmission physically shift the gears.

Common Problems and Solutions

1. Paddle Shifters Not Responding

Symptom: One or both paddle shifters fail to elicit a gear change when activated.

Possible Causes:

Electrical issues are a common culprit.

• Faulty Paddle Shifter Switch: The switch inside the paddle itself may be broken or worn out.
• Wiring Problems: Damaged, loose, or corroded wiring between the paddle shifters and the steering column.
• Clock Spring Failure: A broken clock spring can interrupt the signal from the paddles to the TCM.
• TCM Malfunction: Although less common, the TCM itself could be faulty.

Troubleshooting and Solutions:

1. Inspect the Wiring: Visually inspect the wiring harness connected to the paddle shifters for any signs of damage, such as frayed wires or loose connectors. Use a multimeter to check for continuity in the wiring. A break in the circuit indicates a wiring problem.
2. Test the Paddle Shifter Switches: Use a multimeter to test the paddle shifter switches themselves. Disconnect the switch and check for continuity when the paddle is pressed. If there's no continuity, the switch is likely faulty and needs replacement.
3. Check the Clock Spring: A faulty clock spring can be tricky to diagnose without specialized tools. Common symptoms of a bad clock spring, aside from paddle shifter issues, include problems with the horn, airbag warning light, and other steering wheel controls. A scan tool capable of reading airbag system data can often confirm clock spring issues. Replacing the clock spring is often necessary if it's the source of the problem.
4. Scan for Diagnostic Trouble Codes (DTCs): Use an OBD-II scanner to check for any stored trouble codes related to the transmission or paddle shifters. Codes such as U0101 (Lost Communication With TCM) or P0900 (Shift Actuator Circuit Malfunction) can provide valuable clues.
5. TCM Reset/Reprogramming: In rare cases, a TCM reset or reprogramming may be necessary to resolve communication issues. This should be performed by a qualified technician with access to the appropriate diagnostic equipment.

Example: Imagine a similar issue in a 2018 Honda Accord. The owner complains that the downshift paddle is unresponsive. After inspection, a broken wire within the steering column was found, leading to signal interruption. Repairing the wire resolved the issue.

2. Delayed or Erratic Shifting

Symptom: Paddle shifter activation results in a noticeable delay before the gear change occurs, or the transmission shifts erratically.

Possible Causes:

• Low Transmission Fluid: Insufficient transmission fluid can impact shifting performance.
• Degraded Transmission Fluid: Old or contaminated transmission fluid can lose its lubricating properties and affect shifting quality.
• Transmission Solenoid Issues: Faulty solenoids within the transmission can hinder smooth gear changes.
• TCM Software Glitches: Software bugs in the TCM can sometimes cause shifting irregularities.

Troubleshooting and Solutions:

1. Check Transmission Fluid Level and Condition: Inspect the transmission fluid level using the dipstick (if equipped) or the designated fill plug. The fluid should be at the correct level and have a bright red color. If the fluid is low, dark, or smells burnt, it needs to be replaced.
2. Perform a Transmission Fluid Flush: A transmission fluid flush can remove old fluid and contaminants, improving shifting performance. Ensure you use the correct type of transmission fluid specified for your Q50.
3. Diagnose Transmission Solenoids: A mechanic can use a scan tool to test the functionality of the transmission solenoids. If a solenoid is found to be faulty, it will need to be replaced.
4. TCM Software Update: Check with your Infiniti dealer to see if there are any available software updates for your Q50's TCM. Updating the software can sometimes resolve shifting issues caused by software glitches.

Example: A similar situation occurred with a 2019 BMW 3 Series. The driver experienced sluggish shifts when using the paddle shifters. A transmission fluid flush, replacing old and dirty fluid, greatly improved the responsiveness of the paddle shifters.

3. Paddle Shifters Only Work Intermittently

Symptom: The paddle shifters function correctly sometimes, but other times they fail to respond.

Possible Causes:

• Loose Connections: Intermittent connection issues within the wiring harness or at the paddle shifter switches.
• Temperature Sensitivity: Temperature fluctuations can sometimes affect the performance of electronic components.
• Clock Spring Wear: A clock spring nearing the end of its lifespan may exhibit intermittent connectivity problems.

Troubleshooting and Solutions:

1. Inspect and Secure Connections: Carefully examine all connectors in the paddle shifter circuit. Ensure they are securely connected and free from corrosion. Use dielectric grease to protect the connections from moisture and corrosion.
2. Test in Different Temperatures: Observe the paddle shifters' behavior in different weather conditions. If the problem only occurs in extreme temperatures, it could indicate a temperature-sensitive component.
3. Consider Clock Spring Replacement: If the problem persists and other steering wheel controls are also exhibiting intermittent issues, the clock spring is likely the culprit.

Example: Consider a 2021 Audi A4 with intermittent paddle shifter issues. The problem appeared only during cold weather. After tightening the connections in the steering column and applying dielectric grease, the issue was resolved. The cold weather was causing the connections to contract slightly, leading to intermittent signal loss.

4. Paddle Shifters Feel Loose or Broken

Symptom: The paddle shifters feel physically loose, wobbly, or broken.

Possible Causes:

• Physical Damage: Accidental impacts or wear and tear can damage the paddle shifters themselves.
• Loose Mounting Hardware: The screws or clips that hold the paddle shifters in place may have come loose.

Troubleshooting and Solutions:

1. Inspect for Damage: Visually inspect the paddle shifters for any signs of cracks, breaks, or other physical damage.
2. Tighten Mounting Hardware: Check the screws or clips that secure the paddle shifters to the steering wheel. Tighten them as needed. If the hardware is damaged, replace it with new components.
3. Replace Damaged Paddle Shifters: If the paddle shifters are severely damaged, they will need to be replaced. You can purchase replacement paddle shifters from Infiniti or aftermarket suppliers.

Maintenance Tips for Q50 Paddle Shifters

Preventive maintenance can help extend the life of your Q50's paddle shifters and avoid many of the problems discussed above:

• Regularly Inspect Wiring: Periodically inspect the wiring harness connected to the paddle shifters for any signs of damage or wear.
• Keep Connections Clean and Dry: Protect electrical connections from moisture and corrosion by applying dielectric grease.
• Follow Transmission Fluid Service Intervals: Adhere to the recommended transmission fluid service intervals in your Q50's owner's manual. Regular fluid changes will help keep your transmission shifting smoothly.
• Avoid Harsh Shifting: While paddle shifters are designed for sporty driving, avoid excessively harsh or abrupt shifts, as this can put unnecessary stress on the transmission and related components.

Keeping Your Q50 in Top Condition

Maintaining your 2020 Q50 requires a proactive approach. Regular servicing is key. This includes oil changes, brake inspections, tire rotations, and fluid checks. Address any unusual noises, vibrations, or warning lights promptly. Ignoring these can lead to more serious and costly repairs down the road. Consult your owner's manual for recommended maintenance schedules. Consider using high-quality parts and fluids when servicing your car. This can improve performance and longevity. Also, keep your car clean, both inside and out, to prevent rust and corrosion. By taking good care of your Q50, you can ensure that it provides you with years of reliable and enjoyable driving.