U0150low severityNetwork
Lost Communication with Audio Amplifier Module
on 1997 BMW 318ti E36 1.9L I4 M44 · RWD
What this code means
Cannot communicate with the audio system amplifier module.
Symptoms
- No sound from speakers
- Audio system not responding
- Radio display works but no output
- Infotainment audio features limited
Common causes
- Amplifier module failure
- CAN bus or MOST bus wiring
- Module power loss
- Fuse blown
- Fiber optic cable damage
Diagnostic steps
- Check amplifier fuse
- Test power and ground
- Check data bus wiring
- Inspect fiber optic connections if applicable
- Test amplifier with direct input
Repair notes
Check fuses. On vehicles with MOST bus (BMW, Mercedes), check fiber optic connections.
Other Network codes on this vehicle
U0001
High Speed CAN Communication Bus
U0002
High Speed CAN Communication Bus Performance
U0003
High Speed CAN Communication Bus (+) Open
U0004
High Speed CAN Communication Bus (+) Low
U0005
High Speed CAN Communication Bus (+) High
U0006
High Speed CAN Communication Bus (-) Open
U0007
High Speed CAN Communication Bus (-) Low
U0008
High Speed CAN Communication Bus (-) High
U0009
High Speed CAN Communication Bus Shorted Together
U0010
Medium Speed CAN Communication Bus