A sunroof that won't close on your 2020 Infiniti QX60 creates an urgent problem—exposure to weather, security concerns, and potential interior damage demand immediate resolution. Understanding the electric sunroof system helps diagnose whether motor, track, switch, or control issues prevent proper operation.
Sunroof System Operation
The QX60's power sunroof uses an electric motor driving the glass panel along guide tracks. Position sensors tell the control module where the panel is located. Safety features prevent closing when obstructions are detected. The system remembers calibrated positions for fully open, tilted, and closed states. Problems with any component can prevent normal operation.
Motor and Drive Mechanism Issues
The sunroof motor can fail completely or weaken with age, causing slow operation or inability to move the panel against resistance. Gear wear in the drive mechanism creates similar symptoms. Listen for motor sounds when operating the switch—clicking without movement suggests mechanical binding, while silence indicates electrical issues. Motors that work sometimes but not others often have failing brushes or commutators.
Track and Guide Problems
The sunroof panel rides on tracks that require occasional cleaning and lubrication. Debris accumulation, corrosion, or damaged guides increase resistance that weak motors cannot overcome. Bent or misaligned tracks from impact or improper closure cause binding. The panel may move partway then stop when it reaches the damaged section. Inspect tracks for visible debris or damage.
Position Sensor and Calibration
Position sensors tell the module where the panel is located. Sensor failure or lost calibration causes erratic operation or prevents movement. After battery disconnection or certain repairs, the sunroof may require recalibration to relearn its position limits. Calibration procedures typically involve cycling the sunroof through its full range while holding the switch.
Code B2718 and Control Issues
Code B2718 relates to sunroof motor circuit or control module faults. This can indicate motor failure, wiring problems, or module issues. The control module may disable sunroof operation entirely if it detects circuit faults to prevent damage or safety issues.
Emergency Closing Procedures
If the sunroof won't close electrically, most vehicles have a manual override. In the QX60, an emergency close tool or hex socket can engage the motor shaft directly. This allows manual closure while awaiting repairs. Check your owner's manual for the specific procedure and tool location for your vehicle.