METZ TMR-E12 Trailer Diagnostic Module with Fault Memory, USB Interface, Supports WABCO/Knorr-Bremse/Haldex EBS, 12V/24V 11031605

Reading and clearing fault codes from trailer EBS systems is streamlined with the METZ TMR-E12, a diagnostic module that supports WABCO, Knorr-Bremse, and Haldex electronic braking systems. With integrated fault memory and a USB connection to your PC, it brings workshop-level diagnostics to commercial vehicle trailers and trucks.

Overview

The TMR-E12 connects to the trailer's ISO 7638 (7-pin) diagnostic socket and communicates with the EBS via CAN and K-Line protocols. It is powered directly from the vehicle's 12V or 24V electrical system, eliminating the need for an external power supply. The module is housed in robust industrial plastic, built to withstand the demands of a workshop environment.

What stands out

• Integrated fault memory allows you to store and review diagnostic sessions.
• Live data display enables real-time monitoring of sensor values and system status.
• Component activation lets you test valves, sensors, and other EBS components directly from the software.
• System identification provides detailed information about the connected EBS unit.
• Firmware updates via USB keep the module compatible with future EBS versions.

Technical details

• Supported EBS systems: WABCO, Knorr-Bremse, Haldex
• Diagnostic connector: ISO 7638 (7-pin)
• PC connection: USB
• Power supply: 12V / 24V DC (vehicle powered)
• Supported protocols: CAN, K-Line
• Display: none (PC-based interface)
• Housing material: robust industrial plastic
• Application area: commercial vehicle trailers, trucks

Our verdict

The METZ TMR-E12 is a focused diagnostic tool for trailer EBS systems. Its support for major EBS brands, integrated fault memory, and live data capabilities make it a practical choice for workshops and fleet maintenance operations. The USB interface and included PC software provide a straightforward path to comprehensive diagnostics without the need for a standalone display.