SL/R230: changing ac lines
Thread Starter
Member
Joined: Dec 2010
Posts: 103
Likes: 6
2007 CL550, 2005 SL500, 1984 380SL 1985 Mustang GT
ok I started getting error code b1640 component or signal line is open or short. i tried to jump the compressor with direct line from battery and ground to ground. comp would not come one. I took those two items as bad compressor. i found a new denso on bay for $280. Put it on and now the ac is doing what it should. It turns its self down and still maintains temp. I am assuming the internals of the compressor were not turning on. it still had plenty of gas when I replaced the comp. if it fails again I will repost.
Junior Member
Joined: Jul 2016
Posts: 53
Likes: 2
SL550
This being an old thread, I hope you are still on the forum.
Since you have resolved the issue with a new compressor, what is your N70b1 temp reading at OCP?
Also, are you still getting very low dew point temp reading at multifunction sensor?
Since you have resolved the issue with a new compressor, what is your N70b1 temp reading at OCP?
Also, are you still getting very low dew point temp reading at multifunction sensor?
Junior Member
Joined: Jul 2016
Posts: 53
Likes: 2
SL550
i replaced the thermistor but still OCP N70b1 reads 32.45 Fahrenheit. ACC control, N70b1 reads realistic value - 75 to 82 in current weather. What is interesting is when OCP connector is disconnected, ACC N70b1 reads 32.45.
