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Is there power at the high pressure switch. Power comes from HP switch and to the low pressure switch. See diagram below
Let me know please
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See if you have power coming from Pin #19 on the powertrain control module.
Does this have auto temp control or manual temp control?
Thanks, ***** ***** see what i can find. Be back soon
Here is what i can come up with. #19 is the tan/light green wire.
If you unplug the pressure switch is there power at the Tan/Lt Green pin?
That wire goes straight from the PCM to the switch,,,,i'm stumped :-(
I will see if anyone else has ever came across this before because it sure isnt making sense to me..good luck bud.
Hello, new expert here, The system is not setup with power from the PCM to the pressure switches persay, Hard to explain but the PCM is only reading pressure switch grounding, both switches, Power is not going to be present at either switch, It flows through small sensor on the HVAC case called the de icing sensor, so,, may I ask what is the problem at hand? why are you asking the question? what is not working and what all has been done? performed? thanks
remove the AC relay.any teminals have 12 volts
did you bypass both high and low switches
still need the volt test at relay
how many? 1?2?3? I am trying to gather as much informatiin as I can, Not being there.thanks
ok, you may be misunderstanding, Remove the AC relay , Turn key ON< probe the terminals the relay plugs into, How many terminals have power? is this what you did and only one does?Its the 5 prong relay
ok, good, now jump 30 and 87, I have diagram link included. Key ON, what does compressor do>? BTW: what are the freon pressure readings with engine off
little low, is this with engine not running? if so. jump relay and get pressures up some maybe? 8 oz +/- you need to be around 100 both high low engine off. OR 45 low 200 high as an average only
ok, pretty close, like low side a bit lower but close., so,, the system does work, I assume you swapped relay? you have power to relay as needed, NO power goes the either switch, is does NOT work that way. so, need to locate the de icing sensor on front side of the HVAc case, unplug, turn key on, how many wires have 12 volts? see the link
well, all I can say is... here is the diagram. "B" shown on the right is power to that sensor., That sensor controls a "GROUBD" to both switches. NOT 12 volts, The PCM reads a ground connection and controls the AC relay on the left side of the diagram, You seem to have everything so,, possibles are. icicng sensor is bad OR PCM is bad