How to Replace Transistors if PCMTuner Module 71 Bench Not Working?

By | June 23, 2022

PCMTuner comes with spare transistors MMBT2222A for GPT circuits, lots of people damage these by connecting wrongly to ECU so these are replacements if it happens.

Pcmtuner 3 Resistors

You can replace transistors by yourself or at the local repair shop.

The error is usually caused by other power supply not pcmtuner will burn the device.

If you use OBD for power supply, please do not plug in a separate 12V, otherwise, it will cause the device transistor or step-down chip to burn.

 

MUST USE PCMtuner professional power supply!
If you use your own lab power and voltage regulator. You don’t know how device power works. Just adjust the voltage to 13.5 or whatever you think will cause the whole triode to burn out.

 

How to Replace Resistors?

Replace PCMTuner transistors.
Make sure the device and ecu connection via bench cable is proper before changing.
Select the correct protocol (ECU model) in pcmflash software when reading or writing ECU.

 

Customer solution:

Resoldered two transistors K1P, and work bench mode. One soldered K1P other analog p1P, I had only one K1P

Pcmtuner Smart Dongle Cannot Work On Bench Solution 7

replace first this transistor, K1P, analog 1P,p1P

 k1p mmbt2222a – 0.6A 40/75V and p1p pmbt2222a – 0.8A 40/75V

Pcmtuner Bench Mode Not Working Solution 3

Pcmtuner Bench Mode Not Working Solution 2

Pcmtuner Bench Mode Not Working Solution 4

Pcmtuner Bench Mode Not Working Solution 5

PCMTuner Factory Solution:

Which transistors need to be replaced?
Pcmtuner Smart Dongle Cannot Work On Bench Solution 1

  • N1 transistor: with MMUN2113LT1G
  • N2, N3 transistor: with MMUN2211LT1G

The corresponding positions are marked below:
Pcmtuner Smart Dongle Cannot Work On Bench Solution 2

  • Q3, Q9, Q10, Q11 transistor: with MMBT2222A-7-F

The corresponding positions are marked below:
Pcmtuner Smart Dongle Cannot Work On Bench Solution 3

Lots of fixed this problem follow the customer solution.  edc17cp45, edc17c06 tested bench mode module 71 all ok.

 

If still not working after changing transistors, try solution here

http://www.pcmtuner.org/pcmtuner-cannot-read-module-71-after-changing-transistors/

 

Technical support from https://www.iecutool.com/service/pcmtuner-module-71-bench-mode-not-working-solution.html