DAVRPES 1J0927804 Front Right ABS Wheel Speed Sensor Instruction Manual

1. Introduction

The DAVRPES 1J0927804 Front Right ABS Wheel Speed Sensor is a crucial component of your vehicle's Anti-lock Braking System (ABS). This sensor accurately measures the rotational speed of the wheel and transmits this data to the vehicle's Electronic Control Module (ECM). This information is vital for the proper functioning of the ABS, Traction Control System (TCS), and Electronic Stability Control (ESC) systems, which work together to prevent wheel lock-up during braking and maintain vehicle stability, especially in challenging driving conditions. This manual provides detailed instructions for installation, operation, maintenance, and troubleshooting to ensure optimal performance and longevity of your sensor.

Image: The DAVRPES 1J0927804 Front Right ABS Wheel Speed Sensor, shown with its packaging.

2. Installation Guide

Proper installation is essential for the correct operation of the ABS wheel speed sensor. It is recommended that this procedure be performed by a qualified technician. Always refer to your vehicle's specific service manual for detailed instructions and safety precautions.

2.1 Tools Required

• Jack and Jack Stands
• Lug Wrench
• Socket Set (appropriate sizes for wheel nuts and sensor bolts)
• Screwdriver (flathead for clips)
• Torque Wrench
• Safety Glasses and Gloves

2.2 Installation Steps

1. Prepare the Vehicle: Park the vehicle on a level surface, engage the parking brake, and block the rear wheels. Loosen the lug nuts on the wheel where the sensor is to be replaced.
2. Lift and Secure: Using a jack, lift the vehicle until the wheel is off the ground. Place jack stands securely under the vehicle frame for safety. Remove the lug nuts and the wheel.

Image: Illustration showing the removal of the wheel and the general area of sensor installation.
3. Locate and Disconnect Old Sensor: Identify the old ABS wheel speed sensor. It is typically mounted near the wheel hub. Disconnect the electrical connector by pressing any clips or tabs.
4. Remove Old Sensor: Unscrew the retaining bolt(s) holding the sensor in place. Carefully pull the old sensor out of its mounting hole. Be aware that some sensors may have a wire sleeve with a clip that needs to be pressed inwards with a screwdriver to release it. Exercise caution to avoid breaking the wire.


Image: Illustrations showing the removal of the old sensor and releasing its wire clip.

5. Install New Sensor: Insert the new DAVRPES ABS wheel speed sensor into the mounting hole. Ensure it is fully seated and secure it with the retaining bolt(s), tightening to the manufacturer's specified torque.
6. Connect Electrical Connector: Reconnect the electrical connector to the new sensor, ensuring it clicks firmly into place.
7. Reinstall Wheel: Mount the wheel back onto the hub, hand-tighten the lug nuts, and then lower the vehicle. Torque the lug nuts to the vehicle manufacturer's specifications in a star pattern.


Image: Illustration showing the final check of the sensor installation and tire replacement.

8. Test System: After installation, start the vehicle. The ABS warning light on the dashboard should turn off automatically. If it remains on, refer to the troubleshooting section.

Image: A vehicle dashboard showing the ABS warning light, which should turn off after successful sensor replacement.

2.3 Product Overview Video

3. Operating Principles

The ABS wheel speed sensor plays a fundamental role in modern vehicle safety systems. It operates by detecting the rotational speed of the wheel and converting this mechanical motion into an electrical signal. This signal is then sent to the vehicle's Electronic Control Module (ECM).

The ECM uses the data from all wheel speed sensors to monitor the speed of each wheel independently. If the ECM detects that one or more wheels are locking up during braking (i.e., rotating significantly slower than the others), it rapidly modulates the brake pressure to those wheels. This prevents skidding and allows the driver to maintain steering control during emergency braking. Similarly, for Traction Control Systems (TCS) and Electronic Stability Control (ESC), the sensor data helps the ECM detect wheel spin or loss of directional control, allowing these systems to intervene by reducing engine power or applying individual brakes to restore traction and stability.

Image: A conceptual diagram illustrating the placement and function of ABS wheel speed sensors within a vehicle's braking system.

4. Maintenance

ABS wheel speed sensors are generally maintenance-free components. However, regular inspection during routine vehicle servicing can help identify potential issues early.

• Visual Inspection: Periodically check the sensor and its wiring for any signs of physical damage, corrosion, or loose connections. Ensure the wiring harness is securely routed and not rubbing against moving parts.
• Cleanliness: While designed to withstand harsh conditions, excessive buildup of dirt, debris, or rust on the sensor tip or tone ring (if applicable) can interfere with its readings. If accessible, gently clean the sensor tip with a soft cloth.
• Professional Check: If you experience any symptoms of a faulty ABS sensor (see Troubleshooting section), have your vehicle inspected by a professional technician. They can perform diagnostic scans to accurately identify the problem.

5. Troubleshooting

A malfunctioning ABS wheel speed sensor can lead to various issues with your vehicle's braking and stability systems. Here are common symptoms that may indicate a problem with the sensor:

• ABS Light On: The most common indicator. If the Anti-lock Brake System warning light illuminates on your dashboard, it often signals a fault with an ABS sensor or related component.
• Brake Pulsing: If the brakes pulse or activate the ABS prematurely during normal braking, it could be due to an erratic signal from a faulty sensor.
• No / Erratic Traction or Stability Control Operation: Since the ABS sensor provides data for TCS and ESC, a malfunctioning sensor can cause these systems to become inoperative or behave erratically.
• Braking Without Pedal Contact: In rare cases, a severely faulty sensor might cause the ABS to activate without the brake pedal being pressed.

If you experience any of these symptoms, it is crucial to have your vehicle diagnosed by a qualified mechanic as soon as possible to ensure the safety and proper functioning of your braking system.

6. Specifications

7. Warranty and Support

The DAVRPES 1J0927804 Front Right ABS Wheel Speed Sensor comes with a 2-Year Warranty Period. This warranty covers defects in materials and workmanship under normal use.

Our products undergo extensive testing to ensure reliability and are manufactured from high-quality materials to withstand extreme conditions, ensuring performance comparable to OEM standards.

For any questions regarding installation, performance, or warranty claims, please contact DAVRPES customer service. Our professional customer service specialists are available to assist you and ensure a satisfactory experience.

You can typically find contact information on the product packaging or through the retailer where the product was purchased.