Detailed 2009 Acura TSX Serpentine Belt Diagram and Routing Guide for Maintenance
Locate the belt routing quickly by referring directly to the diagram specific for the 2009 Acura TSX. This model uses a single serpentine belt that drives the alternator, power steering pump, A/C compressor, and water pump, making precise placement critical for optimal performance.
Identify each pulley clearly on the diagram: the crankshaft pulley sits at the bottom center, while the tensioner is positioned to maintain correct belt tension automatically. Following the exact path prevents slippage and reduces wear on accessories.
Replace or inspect the belt by comparing its condition with the layout shown in the diagram. Look for cracks, fraying, or glazing on the belt surface. Correct alignment ensures the alternator generates proper voltage and the A/C system operates at full efficiency.
Use the diagram for installation after removing the old belt. Loop the new belt according to the routing image, ensuring it sits properly in all pulley grooves. Engage the tensioner to lock the belt in place, then rotate the crankshaft by hand to verify smooth movement and proper alignment.
Keep the diagram accessible for future maintenance checks. Even small deviations from the illustrated path can lead to premature belt failure, reduced fuel efficiency, or accessory malfunction, making the diagram a reliable reference for troubleshooting or replacement.
2009 Acura TSX Serpentine Belt Diagram
Follow the routing shown in the 2009 Acura TSX serpentine belt diagram to avoid misalignment and premature wear. The belt wraps around the crankshaft pulley, alternator, power steering pump, and A/C compressor in a precise path. Ensure the tensioner pulley maintains proper pressure on the belt to prevent slipping.
Start at the crankshaft pulley at the bottom center, then route upward to the alternator on the passenger side. From the alternator, loop around the tensioner, then guide the belt to the A/C compressor on the driver side. Continue to the power steering pump and return to the crankshaft pulley, confirming each groove aligns with its respective pulley.
Check the belt for cracks, fraying, or glazing before installation. Use a wrench to rotate the tensioner and slip the belt over the final pulley smoothly. After installation, rotate the engine by hand to ensure the belt tracks correctly across all pulleys without rubbing or slipping.
Labeling the pulleys during removal helps replicate the correct routing. Keep the diagram accessible while performing maintenance to reduce errors and maintain proper engine operation. Recheck tension after a short test drive, as the belt may settle and require slight adjustment.
Locate and Identify Serpentine Belt Components on 2009 Acura TSX
Begin at the front of the engine bay and locate the serpentine belt running along the pulleys. Identify the crankshaft pulley at the bottom center; it drives the entire belt system. Move upward to find the alternator pulley on the passenger side, which charges the battery and powers electrical components. The power steering pump pulley sits near the driver’s side top, providing hydraulic pressure for steering.
Next, spot the air conditioning compressor pulley positioned below the alternator; this engages the AC system when activated. The tensioner pulley is spring-loaded and located near the center-right; use it to release tension before removing or installing the belt. The idler pulleys guide the belt along its proper path, preventing slack and misalignment.
Trace the belt along each component, noting its exact routing. The sequence usually follows: crankshaft → alternator → AC compressor → idler → power steering → tensioner → back to crankshaft. Inspect each pulley for wear or damage while the belt is removed. Labeling the pulleys or taking a photo helps during reinstallation, ensuring the belt runs smoothly without slipping or noise.
Check that the belt sits fully within the grooves of each pulley. Adjust the tensioner carefully to maintain proper tension, avoiding over-tightening that could damage bearings. A correct alignment across all pulleys ensures optimal performance and longevity of the belt and connected components.
Step-by-Step Routing Diagram for 2009 Acura TSX Serpentine Belt
Locate the tensioner pulley on the upper right side of the engine. Use a wrench to rotate the tensioner clockwise, relieving pressure on the serpentine belt.
Begin routing the belt around the crankshaft pulley at the bottom center. Pull the belt upward to loop around the alternator pulley on the upper left, ensuring it sits securely in the grooves.
Next, guide the belt around the water pump pulley located just above the crankshaft pulley. Make sure the belt aligns fully with the pulley teeth to prevent slipping.
Continue routing the belt to the power steering pump pulley on the upper right. Verify the belt follows the correct path without twisting or overlapping.
Wrap the belt around the A/C compressor pulley at the lower left side. Confirm that the belt tension remains consistent along the entire route.
Finally, return the belt to the tensioner pulley. Slowly release the wrench, allowing the tensioner to apply pressure and secure the belt. Double-check each pulley for proper alignment and seated position before starting the engine.
Common Issues and Replacement Tips for 2009 Acura TSX Serpentine Belt
Check the belt for visible cracks, fraying, or glazing every 30,000 miles. Early detection prevents sudden failures that can disable the alternator, power steering, or AC compressor.
Typical signs of a worn serpentine belt include:
- Squealing noise during engine start or acceleration.
- Loss of power steering assistance under load.
- Battery warning light due to alternator slippage.
Replacement requires proper tensioning to avoid premature wear. The 2009 Acura TSX uses an automatic belt tensioner; ensure the pulley moves smoothly and returns to position without sticking.
Step-by-step replacement tips:
- Locate the belt routing diagram on the engine bay or use a printed reference.
- Release tension using a 3/8” ratchet on the tensioner pulley bolt.
- Remove the old belt carefully, noting the path over each accessory pulley.
- Inspect all pulleys and tensioner for wobble, noise, or damage before installing the new belt.
- Route the new belt according to the diagram, ensuring it sits fully in the pulley grooves.
- Apply tension by rotating the tensioner back into place, then double-check alignment on each pulley.
After installation, run the engine and watch for slipping or misalignment. A properly installed belt lasts around 60,000–100,000 miles under normal driving conditions.
Keep a spare belt in the trunk if frequent long drives are common, as sudden failures on highways can cause further engine damage.