while brothel was asking about a 2010 Vibe, which I have no pubs on, the OP, efan10 asked about a 2004 Vibe. I have an 03 Vibe service manual, should apply to his 04. I doubt this info applies to 09-10's
Very informative thread, but no one actually answered the OP's original question: Where is the low pressure switch located? There is a four-pin switch on the top of the accumulator, but AutoZone shows a 3-pin switch. Can anyone tell me if this is the correct location and switch?
Also, if the switch is bad, can I remove it without first removing the refrigerant? Is there a check valve in the accumulator?
Here are some shots from the 03 service manual, shows the location of the pressure switch (there's only one) and the pin out for the pressure sensor (4 pins)
The procedure for removing the pressure sensor is
1. Discharge and recover the refrigerant
2. Disconnect the A/C refrigerant pressure switch electrical connector
3. Remove the A/C refrigerant pressure switch Use a second wrench to hold the switch mount to avoid bending the liquid line
so seems like there's no check valve to prevent loss of refrigerant when replacing the pressure sensor
The procedure for installing the pressure sensor is
- Use new O-rings lubricated with 525 viscosity mineral oil
- Hold the A/C refrigerant pressure switch mount with an open end wrench to avoid bending the liquid line
1. Install the A/C refrigerant pressure switch
Tighten the A/C refrigerant pressure switch to 10 N-m (7.0 lb.ft.)
2. Connect the A/C refrigerant pressure switch electrical connector
3. Evacuate and recharge the refrigerant system.
4. Operate the A/C system and check for leaks
Amusing (to me anyway) that in the picture they spell it "refridgerant" and "refrigerant" Also a bit annoying (to me anyway) that they randomly alternate between calling it a sensor and a switch