2006 2.0hdi 600 with bench seat. Sorry for the delay, this should be your circuit. The coolant / AC sensor is a 4 pin blue unit (4040). The two pin green is for the egr valve. alut: 2006 2.0hdi 600 with bench seat. I have replaced the 3 relays on the Fans assembly to new ones and problem is gone. Thank you all!!! 2006 2.0hdi 600 with bench seat. 1DIwHz.