Here is the instruction on how to rework (add resistor to) a dead Mercedes-Benz ECU test adapter for Ktag, Kess v2, and VVDI/VVDI2 etc.
Here are the steps to add resistor.
Use cutting pliers to peel the external black plastic film
Then remove the black plastic film
Use the cutting pliers to cut the internal white plastic film mold within PIN4 & PIN5
A short circuit between PIN4 & PIN5 point after cutting
Disconnect P4 & P5 point with a soldering iron and pick up the orange and yellow cores/chips
Solder the orange core to the P4 point and the yellow the P5 point, and solder 120 ohm resistor
Mercedes Benz ECU test adapter modification completes, ready for use.
Reference
A: cable:00=5.0 2C 24AWG black
B: 1007/24AWG color 6
C: blck with the ear chip and blue chip, overmold: 45p pvc black
D: D89P maleovermold: 45 pvc black
Pin assignment:
P1 OBDII F P2 DB9M P3 DC5.5*2.1 with chip
4+5 ——–black————- 1 —————————-
7 ——–brown———– 2
16 ———-red————- 3 —————————-
6 ——-orange———– 4 ————120 ohm resistor
14 ——-yellow———— 5 ———–120 ohm resistor
Note: 120 ohm resistor between P4 and P5 point
Quality symbols: