AL919339 | Genuine OEM Haldex PLC Select 1M ABS ECU

The Genuine OEM Haldex AL919339 PLC Select 1M Electronic Control Unit (ECU) is designed for compatible commercial trailer Anti-Lock Braking Systems (ABS). This electronic brake control module monitors wheel-speed sensor signals and manages ABS brake pressure modulation to help prevent wheel lockup during braking.

Featuring a 12V electrical configuration, SLH-A8 design, and 2S/1M ABS compatibility, this Haldex ECU is intended for single-axle trailers and converter dollies equipped with the appropriate Haldex ABS system.

PRODUCT INFORMATION

• Part Number: AL919339

• Brand: Haldex

• Condition: Not specified

• Component: ABS Electronic Control Unit (ECU)

• Product Series: PLC Select 1M

• ECU Configuration: SLH-A8

• Operating Voltage: 12V DC

• Electrical Connection: DIN

• ABS Configuration: 2S/1M (2 Sensors / 1 Modulator)

• Primary Application: Single-Axle Trailers and Converter Dollies

• System: Trailer Anti-Lock Braking System (ABS)

• Housing: Environmentally Protected Potted ECU Enclosure

• Installation Design: Single-Fastener Mounting

• Sensor Connection: Direct Wheel-Speed Sensor Connection

• Fuel Type: Not Applicable

• Engine Applications: Not Engine-Specific

• OEM Reference: 201200AB

• Additional Reference Numbers: 201200BB, AL919339M1D

APPLICATIONS

The Haldex AL919339 ABS Electronic Control Unit is designed for compatible commercial trailer braking systems requiring a PLC Select 1M ECU with SLH-A8 configuration.

Typical applications include:

• Single-Axle Commercial Trailers

• Converter Dollies

• Heavy-Duty Trailer ABS Systems

• Commercial Trailers Equipped with Haldex PLC Select 1M

• 2S/1M Trailer ABS Configurations

• Compatible Haldex Modular Trailer Brake Systems

Important: This ECU is designed for specific trailer ABS configurations. Compatibility must be verified using the original ECU part number, electrical connections, ABS system configuration, and manufacturer specifications.

FUNCTION

The Haldex AL919339 Electronic Control Unit is responsible for monitoring wheel-speed information and controlling the operation of the trailer ABS system.

When the ECU detects conditions associated with wheel lockup during braking, it sends control signals to the ABS modulator valve to adjust brake pressure. This helps maintain wheel rotation and supports vehicle stability during braking.

A worn, damaged, or failing ABS electronic control unit may cause symptoms such as:

• ABS warning light remaining illuminated

• ABS-related diagnostic trouble codes

• Intermittent communication with ABS diagnostic equipment

• Incorrect or missing ABS modulator control signals

• ABS system failing to operate as intended

• Electrical connection or sensor communication faults

WHY REPLACE AN ABS ELECTRONIC CONTROL UNIT?

A malfunctioning ABS control module may prevent the trailer anti-lock braking system from functioning correctly.

Replacing a defective ECU with the correct Genuine OEM Haldex AL919339 module helps restore proper ABS electronic control, wheel-speed signal processing, and brake pressure modulation.

A properly functioning ABS system is especially important for commercial trailers operating under heavy loads and in challenging road conditions.

FITMENT INFORMATION

The Haldex AL919339 PLC Select 1M ABS ECU is intended for specific single-axle trailer and converter dolly applications.

Before purchasing, verify:

• Original Part Number: AL919339

• OEM Reference: 201200AB

• PLC Select 1M System Compatibility

• SLH-A8 ECU Configuration

• 12V DC Electrical System

• DIN Electrical Connector Configuration

• 2S/1M ABS System Requirements

• Original ECU Housing and Mounting Configuration

• Trailer Manufacturer and Model

• Trailer VIN and Existing ABS System Specifications

If you are unsure whether this ABS control module fits your trailer, please contact us with your trailer VIN, model, original ECU part number, and ABS system information before ordering.

GENUINE HALDEX PART

Haldex manufactures braking and safety system components for heavy-duty commercial vehicles and trailers.

The Genuine OEM Haldex AL919339 PLC Select 1M ABS Electronic Control Unit is designed for specified trailer ABS applications, supporting proper electronic brake control and reliable anti-lock braking system operation when correctly matched and installed.