Actually i just pulled it out to make sure before i posted. There's a few of those little black relays near the ECU(with fan relays). The middle black one pulls up and is not locked into place(wiggling a bit helps it come up). This relay is used on many parts of the car where the silver contacts are the relay coil and the bronze/gold contacts are for the clutch(EFI, FANS, HORN, etc.). You should have +12 across the sockets where the silver terminals go when the clutch is commanded to engage. If you don't have +12, the control console is keeping it off. I would not suggest jumping where the bronze terminals go and force the clutch to engage, that can result in damage(for future readers mainly). The 10A A/C fuse is in the driver kick panel. It's what feeds the clutch coil after the AC COMP relay picks up. Betting on a lost charge though, which is better than a $320 clutch assembly.
Edit: You could also test for an open circuit on the clutch coil itself. Basically one positive wire feeds it and the coil is grounded to the compressor. There's also a lock detection switch so the console knows the clutch is keeping up with engine rpms.
'02 IS300 MSM LSD
Last edited by jasonm4; 06-04-2012 at 11:00 PM.