To read a Mercedes EDC17CP57 Go to product viewer dialog for this item.
using a Ktag 7.020 and the GPT cable, you must follow a Bench mode procedure that typically requires opening the ECU to access the boot pins. This Bosch ECU uses the Infineon Tricore TC1793 microcontroller, which employs GPT (Guard Password Tricore) technology for encryption. Connection Instructions
Pinout Configuration: Connect the Ktag GPT cable (14P600KT06) and the main cable ( 14P600KT02 Go to product viewer dialog for this item. ) to the ECU's external pins as follows: Red: +12V (Pins 3, 50, 88) Black: Ground (GND) Green: CAN Low White: CAN High Yellow: GPT1 Orange: GPT2
Boot Pin: You generally need to solder a grey wire to a specific boot point on the ECU's internal board to put it into boot mode.
Power Supply: Use a stable 13.5V external power supply. This ECU has high current absorption, and relying solely on the Ktag's USB power can lead to communication failure. Software Selection
: In K-Suite, select the Infineon Tricore protocol and choose the specific Mercedes EDC17CP57
plugin (often listed under the vehicle's model, such as W166). Review: Ktag 7.020 on Mercedes EDC17CP57 How to read Mercedes EDC17CP57 with Ktag 7.020 GPT cable
Reliability: 4/5The Ktag 7.020 is a staple for EDC17 work. For the CP57, it is highly reliable once the correct GPT connections and boot pins are established. Unlike older versions, the 7.020 "Master" clones with GPT cables successfully bypass the password protection that previously required expensive original tools.
Ease of Use: 2.5/5The major drawback is the requirement to open the ECU. Mercedes uses a strong sealant on Go to product viewer dialog for this item.
covers; prying them open without bending the aluminum casing or damaging internal components is a high-risk task
. If you are uncomfortable with hardware surgery, newer "Bench Mode" tools (like Go to product viewer dialog for this item. Go to product viewer dialog for this item.
) can sometimes read these via the connector without opening the case, though they are more expensive.
Performance: 4/5The tool provides a Full Backup (Micro + Flash + EEPROM), which is essential for cloning or recovery if a tuning attempt fails. Reading typically takes 2–5 minutes once the connection is established. VerdictFor a cost-effective solution, the Ktag 7.020 remains the best "budget" tool for the Go to product viewer dialog for this item. To read a Mercedes EDC17CP57 Go to product
, provided you have the patience for careful physical disassembly and soldering. ktag-7.020-mb-w166-edc17cp57-7 | OBDII365.com Official Blog
How to Read Mercedes EDC17CP57 with KTAG 7.020 & GPT Cable Reading the Bosch
(found in many Mercedes-Benz vehicles like the W166 ML/GLE 350d) requires specialized tools and a steady hand. This guide walks you through using the KTAG 7.020 master version with the
, which allows you to decrypt the secret password and read/write both Flash and EEPROM without removing the microprocessor. Preparation & Equipment Before starting, ensure you have the following: KTAG V7.020 Main Unit and the specialized (typically a multi-colored 14-pin cable).
: K-Suite (v2.23 or v2.25 is standard for this hardware version). : A stabilized 12V-13.5V power supply. Operating System : Windows XP, 7, 8, or 10. Step 1: Software Configuration Connect your KTAG unit to your PC via USB. and select the "Car" icon or navigate via "Protocols". Search for
and select the model (e.g., ML 350 BlueTEC) or the specific ECU: Bosch EDC17CP57 IROM TC1793 GPT The software will suggest the correct protocol (often Plugin 700 or similar for EDC17 GPT). Step 2: Wiring & GPT Connections Take the Grey GPT Cable provided with the KTAG
The GPT cable is essential for this ECU because it reads the "secret" password needed to unlock the Tricore sectors. Wire Color Description ECU Pin (Standard) +12V Power Pin 1, 5, etc. (Check diagram) GND (Ground) See KTAG diagram See KTAG diagram Required for initial handshake ktag-7.020-mb-w166-edc17cp57-7 | OBDII365.com Official Blog
ktag-7.020-mb-w166-edc17cp57-7 | OBDII365.com Official Blog. OBDII365.com Official Blog March | 2018 | CarOBD.de
The EDC17CP57 cannot enter boot mode without the GPT signal. Locate the pad labeled GPT on the PCB (often found near the CNF pads).
Tip: If you are using needle adapters, ensure they are making firm contact. If you are soldering, use thin wire and ensure no solder bridges the nearby components.
The EDC17CP57 typically has a specific set of pads for reading in Bootmode/GPT mode. You will need to identify the following points on the board:
Note: The KTAG 7.020 usually comes with a diagram file accessible within KSuite or a PDF included with the tool. Refer to the "Mercedes -> EDC17CP57" diagram. You are looking for the 12-pin connector layout.