Where's is the ignition transistor located on a JDM OBD1 PR3 ECU (B16A)

INFORMATION Integra Help
1

:smiley: Hello Everyone!! I have a question on a very rare PR3 B16A OBD1 ecu (This one is for the JDM XSI if I’m not mistaken, or integra with the B16A engine). I tried to use this ecu on my LS/VTEC but it didn’t fire any spark. The engine did crank though. I’m trying to find out where is the ignition trigering on the ECU located so I can swap them with another PR3 ecu that I have for spare. Since they have the same mother board and number as the non-vtec they should use the same transistor as the vtec. If anyone have pictures of it, it would be even better. Any help will be appreciated!!

Vic

2

did you download the ecu pinouts spreadsheet in the teg tips? it lists what all the pinouts are for a number of ecu’s. It doesn’t specifically list the obd1 pr3. but it does list the obd1 pr4 and p61, which, pinout wise should be basically identical in most respects.

3

Where can I find this pin outs??? I would have to trace them and find the transistor/chip that works them but sometimes it is impossible to do this since other chips are on the way.:frowning: