GODIAG ECU GPT Boot AD - ECU Bench & Boot Adapter for Reading/Writing Without Disassembly - J2534 OEM Software & Tunning Tool Compatible

What it is Why locksmiths buy it 4 connection modes Resistor board Controls Your tool Compare In the box FAQ Bench · GPT · Boot · CNF1 GODIAG ECU GPT Boot AD The connection box that gets your programmer onto an ECU that will not answer over OBD. Bench power, switchable CAN, ignition control and a full boot resistor board - in one adapter, with every wire labeled. 1 OBD2 Bench 2 GPT Bench (no opening) 3 Boot 4 CNF1 Works with J2534 pass-thru devices, CG FC200, foxFlash and PCMflash Boot resistor board on a cable - correct values on screw terminals, nothing to solder or lose 120Ω CAN termination you can switch in or out, not fixed Ignition power under software control or by hand, with the flip of one switch GODIAG POWER AUTO 120Ω AUTO / MNL 120Ω Godiag ECU GPT Boot AD Start here What this actually is, in one sentence It is not a programmer and it does not read anything by itself. It is the connection layer: the power, the CAN line, the ignition timing and the boot resistors that sit between the tool you already own and an ECU that is on your bench or refusing to talk through the OBD socket. 01 Your laptop PCMflash, foxFlash or the software that came with your tool. 02 Your programmer Openport 2.0, Scanmatik, Mongoose, FC200, foxFlash - it plugs into a normal OBD2 socket. 03 GPT Boot AD Gives that socket, adds 12V, switchable CAN, ignition control and boot resistors. 04 The ECU On the bench or half-opened. Labeled wires go straight to its pins. The real reason to own one Why a key programmer ends up needing bench and boot Chiptuning is only half the story. Most of the jobs that force a locksmith onto the bench are immobiliser jobs. 1 All keys lost, immo locked over OBD When the PIN / CS / ISN only lives inside the engine ECU and the OBD door is shut, reading the ECU on the bench or in boot mode is the way in. This adapter is how you get on it safely. 2 Used or replacement ECU Read the donor, pull the immo data, write it back and match the unit to the car yourself instead of sending the customer to the dealer. 3 Not only engine ECUs Immo boxes, gearbox modules and clusters need the same thing: clean 12V, a CAN pair and sometimes a pin pulled through the right resistor. The board handles all of it. 4 Stop killing boards Hand-holding a loose resistor on a live ECU is how units die. Here the values are on the board and your wire clamps into a screw terminal. One adapter, four ways in The four connection modes, in plain language Pick a mode to see what it means and when you would actually use it. OBD2 Bench GPT Bench Boot CNF1 OBD2 Bench ECU OUT OF THE CAR, CASE STAYS CLOSED You feed the ECU what the car normally gives it: permanent 12V, ignition 12V, ground and the CAN pair. The adapter turns that into a standard OBD2 socket, so your tool connects exactly like it would in a vehicle - only now nothing else is on the bus and the voltage is steady. This is the mode you will use most. Faster, quieter and far less risky than fighting a half-dead car with a flat battery. Use it when The ECU is already out for another reason The car's bus is noisy or unstable You need a repeatable connection you can trust Your software supports bench but not boot GPT Bench NO DISASSEMBLY, NO SOLDERING Some Bosch Tricore ECUs (the MED17 / EDC17 family) can be pushed into a service mode from the outside. The trick is driving the GPT1 and GPT2 lines at the exact moment the ECU powers up. The adapter brings those lines out and handles the power timing. The case never opens, nothing gets soldered, and the ECU goes back into the car looking untouched. Read before you buy Forming GPT1/GPT2 for PCMflash Module 71 is a Scanmatik 2 PRO capability Other J2534 devices still work here in OBD2 or Boot mode Coverage depends on the ECU and your software, not on the adapter Boot mode FULL ACCESS ON A LOCKED ECU The ECU is opened. At the moment power arrives, one pin on the microcontroller is pulled through a specific resistor to a specific voltage. That tells the chip to start its factory bootloader instead of running the car software - which is how you get complete flash and EEPROM access even when the ECU is locked and refuses everything else. Get the resistor value wrong and nothing happens, or worse. That is exactly why this adapter ships with a resistor board instead of a bag of loose parts. Use it when The ECU is locked / protected over OBD and bench You need the full flash or EEPROM, not just a data block Immo data recovery on all keys lost Reviving a unit after a failed write CNF1 line THE PIN MOST CHEAP ADAPTERS SKIP CNF1 is an extra Tricore configuration line that some boot procedures need alongside BOOT and RESET. Most low-cost adapters never bring it out, so the procedure simply fails and you never find out why. Here it has its own labeled screw terminal on the resistor board, next to 5V, RESET and BOOT. Why it matters Some TC17xx procedures will not enter boot without it No jumper wire hanging off a probe One less reason a job fails for no visible reason The part you will use every time The boot resistor board GODIAG GPT BOOT 5V RESET CNF1 BOOT 100Ω100Ω120Ω300Ω 560Ω560Ω560Ω1KΩ 1KΩ1KΩ1KΩ2KΩ 2.7KΩ2.7KΩ10KΩ 3.3V5VGND Screw terminals, not solder pads. Clamp your wire into 5V, RESET, CNF1 or BOOT and move on. No iron, no cold joints on a customer's ECU. Values already on the board. The common boot resistors are printed and wired, and they can be put in series when a procedure asks for a value that is not there on its own. Reference rails. 3.3V, 5V and GND pads right where you need them, plus a signal LED, a 1N4148 diode and a PNP 2N3906 on board. Anti-lost design. It hangs off the adapter's own cable, so it does not walk off the bench or disappear into a drawer like a loose resistor board would. Usable on its own. GODIAG state it can be used independently for immobiliser work and resistor connections, not only for engine ECUs. On the box itself What the controls do AUTO / MNL switch. Let the software cut and restore ignition power automatically, or take the timing into your own hands. 120Ω button. Add or remove CAN termination. Some ECUs already terminate internally, so a fixed resistor is a problem - this one is a choice. Three status LEDs. Power, auto mode and termination state visible at a glance, no multimeter needed. Labeled ECU harness. Every colored wire has a printed tag - +12V, +12V IGN, GND, CAN H, CAN L, K, PWM and more. DB25 to OBD2 cable. Your tool plugs into a normal OBD2 socket, with a separate barrel jack for the 12V bench supply and a power indicator. Short-circuit protected boot line. The resistor board sits on a protected connection so a slipped probe is less likely to take an ECU with it. Compatibility Will it work with the tool you already have? Pick your programmer: CG FC200 foxFlash Openport 2.0 + PCMflash Scanmatik 2 PRO Other J2534 Straight talk before you order This adapter does not read or write anything on its own. It needs a programmer and its software. You supply 12V. A stable bench power supply plugs into the barrel jack on the OBD2 cable. You still need the pinout for each specific ECU. GODIAG publish wiring diagrams for common units such as MED17.5 and SIMOS 8.10, and the community covers most of the rest. GPT1/GPT2 signal generation for PCMflash Module 71 comes from Scanmatik 2 PRO. With other pass-thru devices you work in OBD2 or Boot mode. Which ECUs are supported is decided by your software, not by this cable. Against the usual alternatives Why not just buy a cheap bench cable Comparison published by GODIAG against common bench and boot adapters. Feature GPT Boot AD Green PCB bench board GPT + DB15 wire set Twin DB25 wire set GPT ✓ ✓ ✓ ✓ Boot ✓ ✓ ✓ ✓ CNF1 line ✓ ✗ ✗ ✗ Compatible with J2534 devices ✓ ✓ ✗ ✗ Boot resistor board included ✓ ✗ ✗ ✗ Dedicated ECU terminal ✓ ✗ ✗ ✗ Ignition control, manual + automatic ✓ ✓ ✗ ✗ Switchable 120Ω CAN termination ✓ Fixed 120Ω ✗ Fixed 120Ω 5V / 3.3V / GND / CNF1 outputs ✓ ✗ ✗ ✗ Package What you get 1GODIAG ECU GPT Boot AD adapter with labeled ECU harness 1Boot resistor board on attached cable 1OBD2 to DB25 cable with 12V input 8Soft silicone jumper wires Before you ask us Common questions Do I have to open the ECU every time? No. OBD2 Bench and GPT Bench both work with the case closed. You only open the ECU for Boot and CNF1 procedures, and even then the resistor board means you are clipping onto pins rather than soldering. Can I use it without any other tool? No. It is a connection adapter. The reading and writing is done by your programmer and its software - FC200, foxFlash, a J2534 device with PCMflash, and so on. What power supply do I need? A stable 12V bench supply with enough current for the module you are working on. It connects to the barrel jack on the OBD2 to DB25 cable, and the green indicator confirms power is present. Why does the 120Ω resistor need a switch? On the bench there is no vehicle network, so CAN usually needs termination to communicate. But some modules already terminate internally, and adding a second resistor breaks the connection. A fixed resistor forces one behaviour; a switch lets you match the module in front of you. Does it support my specific ECU? That question belongs to your software, not to this adapter. If your tool lists an ECU for bench or boot, this gives you the physical connection to reach it - power, CAN, ignition timing and the boot resistors. Is it only for engine ECUs? No. GODIAG state the resistor board can be used independently for immobiliser systems, data reading and writing, and immo resistor connections. Anything that needs clean bench power, a CAN pair or a pin pulled through a known resistor is fair game. Has it been shown working with FC200? Yes. GODIAG demonstrate the adapter together with a GT100 breakout box and CG FC200 reading a BMW EDC17CP02 ECU. One cable between you and the jobs you turn away Bench, GPT, Boot and CNF1 in a single labeled adapter, with the resistor board attached so it is there when the job needs it.