Network
generic / SAE
U0197
Lost Communication with Hands-Free Phone Control Module
The infotainment system cannot reach the hands-free phone controller. Bluetooth telephony, address book sync and emergency call features may be unavailable.
SystemNetwork
Typegeneric / SAE
GroupU0
Range / number1 / 97
Possible causes
- Hands-free module unpowered high
- Gateway module routing CAN messages incorrectly low
- CAN terminating resistor (120 Ω) drifted out of spec low
Symptoms
- Multiple warning lights may illuminate
- Affected modules may go into limp mode or shut down
- Specific functions inoperative depending on module
- Diagnostic tools may show communication faults
Inspection / repair
- Difficulty: medium
- DIY: shop recommended
- Estimated cost: 60–500 €
- Estimated time: 0.3–2 h
- Component: hands free module
- Component: infotainment bus
Sources
References
sae:J2012