Description
Haldex AL919338 trailer ABS electronic control unit (ECU) on the PLC Select 1M platform, configured for 2-sensor / 1-modulator (2S/1M) anti-lock brake systems on multi-axle non-steer trailer axles. Drives a single brake modulator from two wheel-speed sensors, communicates over PLC (Power Line Carrier) for tractor-trailer ABS visibility, and replaces Haldex AL919323 and Midland/GRAU 364429001. The potted, single-fastener housing is designed for direct over-the-road exposure.
Signs You Need a New Trailer ABS ECU
- Trailer ABS warning lamp stays on or flashes intermittently after the bulb-check
- ABS fault codes for ECU power, communication, or modulator-driver failure
- Erratic ABS activation, lockup events, or no ABS function during a stop
- Visible cracking, water intrusion, or corrosion at the ECU housing or connector
Specifications
| Manufacturer | Haldex |
|---|---|
| Part Number | AL919338 |
| Part Type | Trailer ABS Electronic Control Unit |
| Platform | PLC Select 1M |
| Configuration | 2S/1M (2 Sensors / 1 Modulator) |
| Connector Standard | DIN, SLH-A7 |
| Voltage | 12V DC |
| Application | Multi-Axle Trailers (Non-Steer Axles) |
| Dimensions | 4-1/4 in. H x 5-1/2 in. W |
| Weight | 2 lb 6 oz |
| Mounting | Single fastener |
| Enclosure | Potted (environmentally sealed) |
Cross References
This part replaces or is equivalent to the following part numbers:
- Haldex: AL919323
- Midland: 201193FA, 201200AA, 201200BA, 364429001, AL919323, SN2900JA
- GRAU: 364429001, 364429002, 364535001
Applications
This ABS ECU fits 2S/1M trailer brake systems on multi-axle, non-steer trailer axles, including:
- Multi-axle semi-trailers with Haldex FFABS or Haldex ABS Relay Valve modulator systems
- Dry van, refrigerated, flatbed, tank, and specialty (lowboy, RGN, dump) trailers
- 2S/1M configurations on tandem and tridem trailer axles
Note: Pre-2009 trailer installations using a Pre-DIN solenoid harness require Haldex adapter cable AL919347. PLC Select 1M kits can upgrade earlier ECU generations on the same modulator hardware.
Verify your trailer’s ABS configuration (sensor / modulator count) and connector standard (DIN vs. Pre-DIN) before ordering to confirm fitment.
