B1422 Compressor Lock After Compressor Replacement

Hi TacomaWorld,

Have a 2016 V6 Tacoma MT. Air conditioning compressor seized several months ago, didn't get around to replacing it until yesterday. Brand new compressor and clutch, evacuated refrigerant system and recharged with R1234yf. Had to wire 12Vdc to the clutch to get it to engage without turning off after ~5 seconds. When pressing the AC button on the climate control panel, AC light comes on, air blows cold for ~5 seconds, then shuts off. Connected TechStream to the car, shows a current B1422 Compressor Lock code.

I can erase the code with the key in the ON position, but as soon as engine is started, code comes back. Also noticed that attempting to engage the AC clutch through TechStream causes the AC light on the AC button to come on, but no clutch engagement.

The compressor is working (cold air, briefly) and the clutch works when 12Vdc is wired directly to it or the AC button is pressed (again, briefly).

Is there something in TechStream that I'm missing? A way to reset the "AC amplifier"? Have heard that the AC amplifier is what stores the code, I don't know if that's true. If so, can TechStream access and reset the AC amplifier?

Thanks in advance.

Geoff

 

^OEM compressor? I recently read aftermarket compressors often come with dodgy lock switches. Transfer the lock switch from the old compressor to the new one?

 

This, the Lock Sensor on the compressor is defective, not connected properly, or the wiring to it got damaged.

There seems to be alot of issues with Lock Sensors on aftermarket compressors lately so I hope you still have your old compressor to get the sensor from, do note you have to recover the refrigerant to change it on a 3rd gen compressor.

 

This is what I wanted to hear. Thank you both for the insight on the lock sensor. I had my suspicions, but wanted to get some first-hand experience before I attached a scope to the sensor or (again) evac/recharged the system. I'll try swapping sensors today and see what I get.

 

I know it’s not a symptom of the problems you’re experiencing, but did you also have to add any more PAG oil to the system after replacing the compressor? You didn’t mention doing it, so I assume either you don’t have to or maybe you do - anyway, certainly do consider it before you recharge the system again.

 

Well, @Dm93 and @3JOH22A, thanks again for the insight. The lock sensor on the aftermarket compressor was indeed bad. Swapped it with the old sensor and everything is peachy now.

@OnHarrtun'sRoad, I actually had to drain some of the new oil out of the new compressor. This is straight from the service manual and what I did:

"(Oil capacity inside a new compressor and magnetic clutch: 150 + 15 cc (5.1 + 0.51 fl.oz.)) - (Remaining oil amount in the removed compressor and magnetic clutch) = (Oil amount to be removed when replacing the compressor)"