It will then attempt to "Check for Password." This is where the GPT cable does its work.
Reading a Mercedes EDC17CP57 ECU using Ktag 7.020 and the GPT cable requires precision and the correct wiring configuration. This Bosch Tricore ECU is commonly found in Mercedes-Benz vehicles like the W205 C-Class or W166 GLE equipped with BlueTEC diesel engines. Because this ECU is protected, the GPT (Guard Pin Tricore) method is necessary to bypass the TPROT security without physically opening the ECU in some cases, or by using specific boot points to allow full flash and EEPROM access. Hardware Requirements How to read Mercedes EDC17CP57 with Ktag 7.020 GPT cable
To put the ECU into "Boot Mode," you must connect a grey wire (Boot) to the specific boot pin on the PCB. In many Mercedes EDC17CP57 variants, this involves a single soldering point or a probe held firmly against a small resistor or pad on the underside or topside of the board. The Reading Process Once the hardware is connected and the ECU is powered up: Click "Select" on the protocol in KSuite. Go to the "Read" tab. It will then attempt to "Check for Password
Ensure the GPT 1 and GPT 2 wires are not swapped. These are polarity sensitive. Because this ECU is protected, the GPT (Guard
Ktag will first perform an "Identification" to check the hardware and software numbers.