Hi, remote locking failed, alarm, radio, tv working fine, no other faults on dis. 2004 e61 530d

These are the following pin outs from the circuit of the diversity amp

1: fuse
2: fbd to CAS
3: rad_on to CCC or hi if amp (linked to 1
4: rx
5: gnd (linked to 2
6: cod?
7: alg?
8: mod?

I can't find details of 6, 7 and 8, but if put a multimeter on pins 2 and 5 and try the remote should I get a signal if it the remote works, similarly pins 2 and 5 to test the receiver?

Many thanks