ABS 31269

Overview

The ABS 31269 is a high‑performance wheel speed sensor designed for the anti‑lock braking system (ABS) of various front‑wheel vehicles. It measures the rotational velocity of each wheel, providing critical data to the vehicle’s electronic stability control and brake management modules.

Technical Specifications

• Model Number: 31269
• Type: Hall‑effect sensor with magnetic pickup
Operating Voltage: 12 V DC
• Signal Output: Digital square wave (high/low)
• Frequency Range: 0–2000 Hz, suitable for speeds up to 250 km/h
• Temperature Range: –40 °C to +85 °C
• Dimensions: 30 mm × 20 mm × 10 mm (approx.)
• Weight: 0.08 kg
• Mounting Type: Screw‑in with integrated mounting flange
• Connector: Standard 4‑pin automotive connector

Compatibility

The sensor is engineered to fit the front wheel assemblies of a broad range of vehicles, including but not limited to models from Peugeot, Citroën, and Alfa Romeo. It is specifically calibrated for:

• Front‑wheel drive platforms
• Standard ABS modules
• Vehicles equipped with electronic stability programs (ESP) that rely on wheel speed data.

Installation Guide

Installing the ABS 31269 involves a straightforward process:

1. Remove the existing sensor by unscrewing it from the wheel hub and disconnecting its wiring harness.
2. Align the new sensor with the magnetic pickup on the wheel rim, ensuring that the Hall‑effect element faces the magnet correctly.
3. Screw in the sensor using the provided mounting flange, tightening to manufacturer torque specifications.
4. Reconnect the wiring harness, verifying correct pin alignment.
5. Test the signal with a diagnostic scan tool to confirm proper operation before reassembling the wheel cover.

Key Features

• High Accuracy: Precise detection of wheel speed changes, essential for effective ABS and ESP performance.
• Durable Construction: Resistant to vibration, temperature extremes, and automotive contaminants.
• Low Power Consumption: Optimized for efficient operation within the vehicle’s electrical system.
• Compact Design: Minimal space requirement allows installation in tight hub areas.
• Universal Connector: Compatible with standard automotive diagnostic tools and service equipment.

Maintenance Tips

While the ABS 31269 is designed for long‑term reliability, routine checks can help maintain optimal performance:

• Inspect wiring: Look for frayed or damaged cables that could affect signal integrity.
• Check mounting torque: Ensure the sensor remains securely fastened to prevent misalignment.
• Verify magnetic alignment: Over time, wear on the wheel rim may shift the magnet; realign if necessary.

Conclusion

The ABS 31269 sensor delivers dependable wheel speed measurement for front‑wheel ABS systems across a variety of vehicle platforms. Its robust design, precise signal output, and ease of installation make it an essential component for maintaining vehicle safety and stability.