Toyota Repair Problems? Ask a Mechanic for Answers ASAP
2004 - didn't that show up? I selected it.
Hi,for some reason it didnt show it on my side.Ok, the pressure switch is on the right side of the engine compartment
Eric, OK, found the switch. Is there any other reason for the compressor clutch not to get power? The refrigerant pressures are OK and the in-cabin 10A fuse is good. (The switch is over $200., and the dealer doesn't have it in stock.)
This is interesting - there is continuity between terminals 1 and 4 in the range indicated, but the pressure doesn't get to the range, below 28psi/above 455psi, that should open the switch. Plugging the connecter in makes the fan operate, but not the clutch. Maybe an open circuit between the switch and the clutch? Should I make a jumper connection between the switch and the wire to the clutch near the clutch? But wait, late breaking discovery - no power to either 1 or 4 at the switch. Which one should be powered, and from where?
Hi,Ok, terminal #1 goes to the ECM and sends signal to it Terminal #4 is ground and is opened and closed by climate control panel.it sounds like either no signal between the switch and the ecm, or none from ecm to clutch relay.
This is a cycling compressor, not a variable displacement one, is it? (Thinking of borrowing power from the fan control part of the switch - that might indicate whether the grounding function is working - if it didn't blow up while testing.
The control panel A/C light comes on on demand, if that tells us anything.
Where do I go from here?
Excellent. "I'm on it!"
Eric, jumping 1 and 4 makes the compressor cycle, but it pumps for just a couple seconds and kicks out, so doesn't make cold air. Switch, for sure? (Rock Auto lists them for under $20.)Stephen
You were right - again. Cold air all over the place. Too bad Toyota couldn't have afforded a little valve to enable the switch to be changed without evacuating/recharging. But ohhh, no. They saved a quarter of a cent per vehicle. Legendary something.