tem

It will need to be an ignition switched +12V source.

Blue wire/white trace is +.
Comes in via the connector near the ecu, also powers idle control and narrow band 02.

The ECU only supplies the ground side, the +12V side comes from elsewhere in the car, most likely originally from the ignition switch or ECCS relay.  You will have to find a wiring diagram that matches your model if you want to troubleshoot the existing wire.

Pin 113 is where we expect it to be