QuestionI have a problem with my climate controled a/c system and have pulled 8 dtc's from the diagnostic box. They are 121, 132, 134, 211, 232, 235, 414, 417. I have a feeling its the control unit but I'm not sure how I can test the part, any advice will be much appreciated.
Answer Johnny, in 30 years of working on Volvo's, I have NEVER seen an ECC control unit fail. It's always the power stage. That does not mean it's not possible, but I've NEVER seen it. There is no testing I know of other than seat of the pants WAG. If it were my money, I'd replace the power stage. HTH
Mark
