I just figured out a way to disable daytime running light yesterday.

After reading the wiring diagram for an hour I think if I cut a specific wire behind the light switch I can disable the relay in the light switch.
There is a pink connector behind the light switch, after disconnect it the relay was disabled, but the turn signal and the brake light also stop working.
After figured out the wiring diagram I found out the No.5 brown line is a grounded line, and the service manual doesn't mention anything about the No.3 green/white line.

So, I end up cutting the No.3 green/white line and the relay are still working, and then I cut the No.5 brown line and that stop the relay working!

Now the parking light won't came on by itself when started the engine, and the low-beam won't cane on by itself when shift into gear(Reverse and Drive). The fog light switch don't work any more; I think it might because I cut the No.3 green/white line, or for a reason I don't know. Another wired thing after I cut the wire is the low-beam will turn on by it self when key turn into ON/RUN position, and came off after the engine started.

Here is the picture I took for my pink connector (D)