Questions About Cooling Fan ECU - for 3VZ-FE Engine

[hotspur]

1992 Camry LE V6 with 3VZ-FE engine.

With my being close to completing the repair of a blown head gasket (involving refurbishment of both cylinder heads) today I checked the operation of the cooling fan.

The speed of the cooling fan does increase when I switch on the air conditioner (after a few seconds time delay) - which seems fine.

However, the speed of the cooling fan does not seem to change when I open the throttle starting from idle (i.e. when I depress the gas pedal). Should the speed of the cooling fan change when I open the throttle? If so, then in what way should it change?

To aid in diagnosis of any problem with the cooling fan ECU and associated equipment, I measured the items specified in the table in the following page from a service manual:



[By the way, note that the view of the connector shown in the preceding diagram correspond to looking along the wire harness towards the cooling fan ECU, that is looking from the rear of the plug (that is from the rear of the male connector).]

Everything in that table seems to check out OK, except that I don't know whether the following measured values are OK:

pin 4 to Ground 29 kΩ
pin 5 to Ground, throttle closed 29 kΩ

As the table specifies "continuity", what constitutes pass/failure for those measurements?

By the way, I do understand that "continuity" does not necessarily mean 0 Ω ( and maybe 29 kΩ passes as "continuity"). Nevertheless, given that the throttle is in some way supposed to alter the speed of the cooling fan and yet doesn't, and those two are the only questionable measurement resultss, perhaps that's where the problem lies. Does anyone have a wiring diagram that shows the wire from pin 4 of the cooling fan ECU and where it goes to (physically)?

Also by the way, prior to making those measurements on the cooling fan ECU, I tested the Throttle Position Sensor (TPS) - in the process loosening the TPS and then rotating it very slightly and then re-tightening it so that all the resistance values I measured while testing the TPS now comply with specifications.