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norbertwagner1

4Runner AC Problems

My 2009 Toyota 4Runner with a diesel engine is giving me A/C headaches. The air conditioning system just doesn't want to switch on, and it's not cooling at all. My OBD reader shows an error. Anyone else run into this? I'm suspecting it's undervoltage related.

4 comment(s)

marvintiger5

I had a similar issue with my 4Runner. Is it possible you have a refrigerant leak? It could also be a dodgy AC relay or even the pressure switch playing up. Have you checked those?

norbertwagner1 (Author)

Where exactly is the AC relay located? And how would I check for a refrigerant leak without proper tools?

marvintiger5

The AC relay should be in the main fuse box, usually under the hood. But honestly, without the right equipment, detecting a refrigerant leak yourself is tough. Given the error code and the symptoms, it really sounds like it's time to take it to a workshop for a proper diagnosis.

norbertwagner1 (Author)

Took it to a workshop like you suggested! The diagnosis was undervoltage-related compressor shut-off. They sorted it, costing me 240€ Thanks for pointing me in the right direction!

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