True indeed. I was thinking that the upper limit when it all kicks off would be fairly close to the upper normal operating range, but that was conjecture and a quick check of the 03 FSM just revealed that the upper total turn off pressure is 455 psi, which I am amazed by as that seems rather high. So yes, plenty of room there to have a 220 fan turn-off setting. But the 199 and 455 are for an 03.
So, what are the "normal", "fan on" and "total shutdown" pressures for a 2000 if anybody knows?
I still think that the OP should measure the pressure to see if he could be just a tad too low for the fan to kick in but not so low that the system is off or generally ineffectual. Faster to do than to futz around with the electrics if it's not an obvious fuse. Well, as long as one has gauges, admittedly.
lessee here is a paste my fsm manual page (that got messed up and missing the pics):
AIR CONDITIONING – PRESSURE SWITCH
AC–91
Author: Date: 2588
2003 LAND CRUISER (RM966U)
PRESSURE SWITCH
ON–VEHICLE INSPECTION
1. SET VEHICLE IN THESE CONDITION
(a) Engine speed at 1,500 rpm
(b) Blower speed control switch at ”HI” position
(c) Temperature control dial at ”MAX. COOL” position
(d) Manifold gauge set setting
2. INSPECT PRESSURE SWITCH OPERATION
(a) Disconnect the connector.
(b) Inspect pressure switch continuity (Magnetic Clutch Control)
(1) Connect the positive (+) lead from the ohmmeter to
terminal 1 and the negative (–) lead to terminal 2.
(2) Check continuity between terminals when the refrigerant
pressure is changed, as shown in the illustration.
If continuity is not as specified, replace the pressure switch.
Magnetic clutch control
Low Pressure Side
ON (Continuity)
196 kpa
(2.0 kgf/cm2, 28 psi)
OFF (No Continuity)
High Pressure Side
3,140 kpa
(32.0 kgf/cm2, 455 psi)
OFF (No Continuity)
Last edited:
