Components must be added to the ECU for boost control to work.
If you do not have experience or the correct tools to add these components, do not attempt to do this yourself.
Components
Component |
Location |
Large transistor |
Q29 |
Small transistor |
Q20 |
Diode |
D14 |
220 ohm resistor (red/red/brown) |
R70 |
330 ohm resistor (orange/orange/brown) |
R71 |
Installation
Installation:
| 1. | Read these instructions. |
| 2. | Desolder Q20, Q29, R70, R71 and D14. |
| 3. | Install and solder the large transistor in Q29. The transistor writing should face you. |
| 4. | Install and solder the small transistor in Q20. The transistor writing should face you. Note that Q20 may be present on some ECUs - in this case you do not need to replace Q20 and may skip this step. |
| 5. | Install and solder the diode in D14. The stripe on the diode should be on the left. |
| 6. | Install and solder the 220 ohm resistor into R70. The resistor will have red/red/brown markings. |
| 7. | Install and solder the 330 ohm resistor into R71. The resistor will have orange/orange/brown markings. |
Some ECUs contain all the necessary components (PR4, square frame JDM ECU's with IAB control). In this case, you do not need to change anything.