As more of these enter the US, I'm sure they will have the same problems I'm encountering. So hopefully this discussion will be a future source of info. The AC hasn't worked since I bought it and the PO had no info about the system's history, so I'm starting from scratch.
'90 JDM 1HDT RHD. The AC controls are buttons, not sliders, with the 'auto' feature. It has a center console cooler (of course doesn't work). It does not have a rear AC, as far I have investigated.
I have used the FSM to test the system, but the FSM has discrepancies that I can only attribute to the origin, early make and RHD.
Here's what I've found:
1. there is no very little refrigerant, about 3psi
2. the system draws negative pressure when the clutch/compressor engages
3. the mag clutch engages with voltage applied
4. there is no signal/voltage going the the magnetic clutch
5. the mag clutch relay works with volts, 77ohms across the coils 1-3, no ohms on 2-4 when open
6. the "AC amplifier" is not getting any voltage except on term#14. This connector is for the dual AC, but I one have single and the wire slots are blank. JDM difference?
7. the controller switches all check out
Diagnosis:
- Compressor works, not sure how well
- mag clutch relay works
- there is a leak. Maybe there was a rear AC and it was removed and capped improperly?
- no electricity is getting to the stuff that needs it. This may be because of the "triple pressure switch" that is sensing a lack of pressure and shuts off the power to magnetic clutch to protect the compressor. Just a guess.
Solutions?
At this point, I've checked the electrical stuff and it needs pressure in the system before I can check much more. Perhaps that will engage the tri-press-switch and allow the mag clutch to engage. I'm hoping there isn't a bug in the electrical system and it's a matter of adding freon.
I'll let you know how it goes and of course I welcome input!
Thanks
'90 JDM 1HDT RHD. The AC controls are buttons, not sliders, with the 'auto' feature. It has a center console cooler (of course doesn't work). It does not have a rear AC, as far I have investigated.
I have used the FSM to test the system, but the FSM has discrepancies that I can only attribute to the origin, early make and RHD.
Here's what I've found:
1. there is no very little refrigerant, about 3psi
2. the system draws negative pressure when the clutch/compressor engages
3. the mag clutch engages with voltage applied
4. there is no signal/voltage going the the magnetic clutch
5. the mag clutch relay works with volts, 77ohms across the coils 1-3, no ohms on 2-4 when open
6. the "AC amplifier" is not getting any voltage except on term#14. This connector is for the dual AC, but I one have single and the wire slots are blank. JDM difference?
7. the controller switches all check out
Diagnosis:
- Compressor works, not sure how well
- mag clutch relay works
- there is a leak. Maybe there was a rear AC and it was removed and capped improperly?
- no electricity is getting to the stuff that needs it. This may be because of the "triple pressure switch" that is sensing a lack of pressure and shuts off the power to magnetic clutch to protect the compressor. Just a guess.
Solutions?
At this point, I've checked the electrical stuff and it needs pressure in the system before I can check much more. Perhaps that will engage the tri-press-switch and allow the mag clutch to engage. I'm hoping there isn't a bug in the electrical system and it's a matter of adding freon.
I'll let you know how it goes and of course I welcome input!
Thanks