A/C issues

[shegarty]

Was able to check the low side and the switch is closed (no resistance). I wasn't able to get probes on the high side switch as it is pretty buried. Its pouring rain right now but when it lets up i can get the front wheel and splash guard off for better access.

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[shegarty]

Was able to check the low side and the switch is closed (no resistance). I wasn't able to get probes on the high side switch as it is pretty buried. Its pouring rain right now but when it lets up i can get the front wheel and splash guard off for better access.

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I retested the low side after removing the splash guards as I could get a better look at the pins. It would appear that the switch is open (infinite resistance no continuity) which would indicate a low pressure situation and the need for refrigerant. I think I was crossing my leads earlier as I couldn't get clear access to the plug.

The high side switch has three wires. ~40 kΩ between all combinations. Can I assume that the high pressure switch is faulty or is this reading accurate for a low pressure situation? [emoji44]

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[UmmScott]

So the high side switch has three wires. ~40 kΩ between all combinations. Can 8 assume that the high pressure switch is faulty then? Don't like my odds of getting it out though ... [emoji44]

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No. That's not how a 3 wire switch works. Thats a transducer generally.

That switch will do 2 things. A... Tell the PCM what the system high side pressure is by producing a varying voltage proportional to system pressure. PCM will then turn the rad fans on high/low as needed or even off.
And B... too high will shut the compressor off.

Is it bad? We dont know. Cant really jump them out to test.

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[UmmScott]

But that's odd.. you said you have a rad clutch right? So theres no rad fans..

Hmmm

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[shegarty]

No. That's not how a 3 wire switch works. Thats a transducer generally.

That switch will do 2 things. A... Tell the PCM what the system high side pressure is by producing a varying voltage proportional to system pressure. PCM will then turn the rad fans on high/low as needed or even off.
And B... too high will shut the compressor off.

Is it bad? We dont know. Cant really jump them out to test.

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I was editing while you replied. Looks like i am low on gas as the low pressure switch is actually open.

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[UmmScott]

Ok cool...

I cant remember the cut in point of that switch but..
Awesome im glad you figured it out man

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[DenaliReyes]

Just the thread I have been looking for. Will try all your steps. I bought a multi meter. I gotta learn how to use these things lol
Thanx