Bosch EDC15P: how to read it on OBD, bench and boot

The EDC15P is a Bosch diesel ECU — EDC15P (ST10) used on VW Golf, Bora, Passat and Škoda 1.9 TDI PD. This page is a read-and-identify guide for workshops that need a virgin dump, a clone or a starting file before a remap. It is not a pin-for-pin copy of any one tool’s screenshot.

Pinouts and protocols vary by hardware revision. Always open the official diagram inside your tool for this exact Bosch / Continental / Delphi / Denso number before you apply power. A wrong connector orientation or a guessed boot pin is a common way to kill a healthy ECU.

EDC15P technical overview

Bosch EDC15 diesel. K-line bench is common; boot/BDM recovers a silent ECU.

How to identify the ECU before you connect

Photograph the label. Save the manufacturer number, the vehicle part number, the software number and the hardware number. Those four strings decide the protocol. Two ECUs that look identical can need different boot pins.

• Bosch / Continental / Delphi / Denso number on the sticker
• Vehicle OEM part number
• Software number (SW) and hardware number (HW)
• Connector count and housing colour
• Whether the car still communicates on OBD

OBD, bench and boot — which one first?

OBD

Use OBD only when the car still talks, voltage is stable and the tool lists a real protocol for this EDC15P. Never write on OBD after a failed attempt that already dropped the ECU offline — switch to bench or boot.

Tools recorded for OBD on this family: Alientech KESS3, Alientech KESS V2, Autotuner and Magic Motorsport Flex.

Bench

Bench means the ECU is on the table, powered from a PSU, talking CAN or K-line through the vehicle connector. It is the default path when OBD is locked, slow or missing, and for a full backup before you clone.

Tools recorded for bench: Alientech KESS3, Alientech K-TAG, Autotuner and Magic Motorsport Flex.

Boot / BDM

Boot (or BDM / JTAG / GPT, depending on the silicon) is the recovery mode. You open the case, follow the tool’s PCB diagram, and talk to the processor when the vehicle protocol is dead. Read first. Write the verified original second.

Tools recorded for boot: Alientech K-TAG, Autotuner and Magic Motorsport Flex.

Typical EDC15P bench signals

Older EDC15 housings are usually K-line on the bench. Confirm the K-line pin and both grounds in the tool diagram — connector views are often mirrored.

Safe reading procedure

• Confirm SW/HW and pick the protocol that matches both, not just the family name.
• Set the PSU to 13.8 V with enough current headroom; watch the ammeter while the tool connects.
• Read twice. The two dumps must match before you archive the file as original.
• Store the file with SW, HW, VIN if present, and the tool log.
• Do not write anything until the original is saved off the laptop as well as in the tool.

When the ECU no longer answers

A silent EDC15P after an interrupted OBD write is a brick, not a ‘try another OBD tool’ job. Open the case, use boot, and flash a verified original from ecuflashfiles.com when that SW exists in the library — or the dump you took before the job. Then check immobilizer / EEPROM data before the ECU goes back in the car.

Related files

Search ecuflashfiles.com for original EDC15P dumps by software number. Custom Stage 1 and delete work for the same car is a separate upload on ecufilemarket.com.

Original dumps sold on ecuflashfiles.com are for restore, comparison and workshop use. Stage 1 and delete work belongs on ecufilemarket.com. In some regions DPF off, EGR off, OPF / GPF off, SCR / AdBlue and even Stage 1 may be used only on off-road and competition cars. Confirm the law where the vehicle is registered.