Thread: Discovery 2 CDL

Hi, listen with stethoscope or your ear on the doors close to the actuators if you hear any sound when you lock/unlock with the fob or dash switch... if you do the electronic side is ok and the actuators are gone... if complete silence we'll speak then

P.S. Nanocom would not know which door except the driver's is open or closed. It can't make a difference between the status of the tail door or any of the other 3 doors(passenger + 2 rears) cos all theyr's monitoring switch signals are joining into one wire which goes to the BCU as there are only two circuits for doors open/closed status: 1/driver's door, 2/all the others

Thanks for replying, I was hoping you would see the post as I know you are very knowledgeable

Checked as you suggested, and No, there is no activity at all on any of the actuators,

I am aware of the combined signal with the 4 other actuators, plus the 1 for the drivers door.

On locking each door manually, and finally drivers door with key, it will unlock all with remote. As mentioned in post Nanacom is reading both door signals as open, bonnet as closed , checked bonnet on open and Nanacom

From inside with all doors closed and unlocked, the dash switch locks all except Drivers door, unplugged drivers door actuator. Checked with Nanocom and still shows drivers door switch as open

Yes, the driver's door is a kind of a "gateway" for all so if that one's monitoring switch is faulty the others will not work as well... just confirm it appears open even if it was locked with the key ?...how skilled are you with electronics on a scale from 1 to 10? can you work based on diagrams?

I have checked drivers door with actuator unplugged, and still showed as open

from inside locked all other 4 with panel switch, drivers door actuator plugged in and locked with key, and still shows both switches as open

Probably a 7, I do have a copy of Rave also

I just found this Central locking diagram from a workshop manual I have

In RAVE you have Electrical library, go to connector view, see C0733, it used to suffer from corrosion if nothing visible check continuity to earth with actuator unplugged in pin 1(purple/white wire) if no earth means that the BCU is faulty, if you get earth it might be a short in the wiring but the BCU is not ruled out cos the problem can still be within it, check if the loom is not chafed where it passes between body and door.

Many thanks, I will check that when I get back from work tomorrow and let you know.

You can check continuity to earth in the actuator's plug C0441 pin 6 (purple/white wire) first cos earth there means open door input as the switch is N/O with closed door and it's supposed to close to earth when the door is opened for the BCU to know that