2 weeks ago I installed the Grom BT3 unit in my 2001 BMW 325 ci. And cannot get it to work.
I have a Factory BMW Business CD, Harmon Kardon radio. It was factory wired for CD changer & phone, trunk & center console. But never had those components installed. It does not have Nav nor DSP. It has a CD button rather than a Mode button, but same location.
I have checked all wiring/pin connections 6 times, I ended up T-splicing and soldering the Bus wire. I have paired, unpaired and repaired numerous times.
The red light inside the unit comes on (steady), but I cannot get the music or phone to connect. For that matter it seems like there is no recognition of the Grom unit (or a CD changer)
I reflashed the Grom BT3 unit firmware, following the Grom instructions to the letter, (several times) It still doesn’t work and the symptoms are the same.
When I press the CD button (again- radio has CD button not Mode button). on the radio it displays “No Disc” then goes back to FM radio music.
I have never ever seen “DISC 1 TRACK 1” on my factory car stereo. As listed in section “2.5 Testing the Operation” on page 4 of the “Grom-BT3 Bluetooth integration to factory car stereos Hands free calls, Wireless Bluetooth streaming manual, Rev. 2.1, Copyright Grom Audio 2014.
Now what? I am stuck with my dash apart for 2 weeks. Any suggestions?