According to the data sheet, pin 3 is signal and pin 2 is ground. However, your original message states that pin 2 is signal (output) and pin 3 is ground. Please verify that you are measuring the correct pins and that you didn't accidentally reverse the two leads (or that Renault's wiring diagram is wrong).
Where did you purchase this sensor? Unfortunately, both eBay and Amazon are somewhat notorious for selling counterfeit parts. They can look identical to the genuine ones, right down to date codes, boxes, logos, etc.