E61: 5 series remote inoperative (NOT comfort Access)

E61: 5 series remote inoperative (NOT comfort Access)

Test a remote with a RF checker to verify it is sending out a signal

Please use a wiring diagram

For vehicles UP TO 9/05 production:

Check B+ and B- at N8a (Diversity Antenna). 

The ground wire may not be there, which means its grounded through the hold down bolt.

IF no B+, check Fuse 77 wiring through tailgate and repair as required. 

If good, and no signs of water damage; press a button on remote and watch for a signal change at pin 2 of x13911.

If good, then go to the CAS and check pin 33.

If NO signal trace back, check for tailgate harness damage.

Vehicles AFTER 9/05 production:

Check for B+, B- at N8a (Diversity Antenna). Pin 5 may or may not be there. If not, the ground point is hold down bolt.

IF no B+, check Fuse 59. If good, check wiring through tailgate and repair as required.

Monitor Pin 2 at N8a (Diversity Antenna).

When pressing button on remote, you should see a change of voltage.

If NO change, check the rear window aerial. If the aerial is good, replace antenna amplifier. 

If there is a change, access CAS and check Pin 33 for a change of voltage when pressing button on the remote. 

If you have a change, replace CAS module. if NO change, you have a broken wire. Check the hinges for broken wiring