B1FF195 - B1FF195 SIM Card Not Connected
Fault Depth Definition
Fault code B1FF195 is a specific DTC (Diagnostic Trouble Code) generated during the interaction between the vehicle's remote communication module and the diagnostic gateway. This code is specifically used to identify internal communication status anomalies within onboard emergency rescue systems (such as eCall, SOS system). In the system architecture, the SIM card (or UIM card) serves as a core component for identity authentication, responsible for establishing a logical connection between the vehicle control unit and the cellular mobile network. When the diagnostic monitoring unit detects that the physical interface of the SIM card is in a disconnected state, electrical signals are interrupted or the module cannot pass protocol handshakes, the system will automatically lock and record this fault code to indicate a severe barrier in the communication link. This code reflects the control unit's underlying status monitoring results for the WWAN (Wireless Wide Area Network) component and belongs to a key diagnostic metric of the vehicle telematics system.
Common Fault Symptoms
When the B1FF195 fault code is activated and stored in the OBD-II interface or dedicated gateway, drivers and passengers can observe the following specific manifestations in driving experience:
- Emergency Rescue Service Failure: The SOS button trigger function cannot send distress signals to the remote operations center.
- Abnormal Network Status: Onboard telematics terminals display "No Network", "Registration Failed" or show no SIM card signal icon detected.
- Location Data Interruption: Real-time location information services relying on cellular networks (such as remote vehicle tracking, anti-theft alarms) stop updating.
- System Warning Indications: The central screen or dashboard may pop up text warning information such as "Communication Module Error" or "Rescue Function Restricted".
Core Fault Cause Analysis
Based on fault code setting logic, this anomaly is usually caused by the following physical or logical factors in three dimensions:
- Hardware Component (SIM Card itself): SIM card chip data read errors within the communication interface control unit, defined as "SIM Card Fault" in raw data. This covers chip oxidation, storage area damage, or encryption authentication key failure leading to protocol handshake failure.
- Wiring/Connector (Physical Connection State): Corresponds to the description of "SIM Card Not Connected". This could be due to poor contact caused by fatigue of the metal elastic blades inside the SIM card slot, broken connector pins, or incorrect insertion direction of the card preventing physical pins from establishing an effective pathway with the controller.
- Controller (Logic Operation and Instructions): The main control chip within the vehicle gateway or communication module fails to judge during the execution of underlying diagnostic protocols. For example, the system attempts to initialize the communication module but receives an invalid response; this belongs to internal logic determination anomalies of the control unit rather than being directly caused by external power issues.
Technical Monitoring and Trigger Logic
The generation of this fault code strictly follows specific electrical and software environmental conditions, and its monitoring and triggering mechanisms are as follows:
- Signal Monitoring Protocol: The system queries terminal status by sending standard industrial communication protocol instructions "AT+ Command". When the return response indicates "UIM Lost or Failed", the monitoring module determines the existence of communication risk and prepares to store the fault code.
- Electrical Trigger Environment: The premise for fault determination is that the onboard power supply system is in normal working range, with specific monitoring condition being "Working Voltage 9V-16V". Within this wide voltage range (covering standard vehicle $12V$ power fluctuations), if communication handshake requirements still cannot be met, the system will lock this code.
- Operational Start Logic: Storage and activation of the fault code are only monitored under the condition that the ignition switch is in "Start Switch to ON Position". This means the system needs to detect a continuous UIM loss signal while the vehicle is powered on; once battery is disconnected or vehicle turns off to OFF position, this fault code may be temporarily masked or enter "Service Required" state.
Cause Analysis Based on fault code setting logic, this anomaly is usually caused by the following physical or logical factors in three dimensions:
- Hardware Component (SIM Card itself): SIM card chip data read errors within the communication interface control unit, defined as "SIM Card Fault" in raw data. This covers chip oxidation, storage area damage, or encryption authentication key failure leading to protocol handshake failure.
- Wiring/Connector (Physical Connection State): Corresponds to the description of "SIM Card Not Connected". This could be due to poor contact caused by fatigue of the metal elastic blades inside the SIM card slot, broken connector pins, or incorrect insertion direction of the card preventing physical pins from establishing an effective pathway with the controller.
- Controller (Logic Operation and Instructions): The main control chip within the vehicle gateway or communication module fails to judge during the execution of underlying diagnostic protocols. For example, the system attempts to initialize the communication module but receives an invalid response; this belongs to internal logic determination anomalies of the control unit rather than being directly caused by external power issues.
Technical Monitoring and Trigger Logic
The generation of this fault code strictly follows specific electrical and software environmental conditions, and its monitoring and triggering mechanisms are as follows:
- Signal Monitoring Protocol: The system queries terminal status by sending standard industrial communication protocol instructions "AT+ Command". When the return response indicates "UIM Lost or Failed", the monitoring module determines the existence of communication risk and prepares to store the fault code.
- Electrical Trigger Environment: The premise for fault determination is that the onboard power supply system is in normal working range, with specific monitoring condition being "Working Voltage 9V-16V". Within this wide voltage range (covering standard vehicle $12V$ power fluctuations), if communication handshake requirements still cannot be met, the system will lock this code.
- Operational Start Logic: Storage and activation of the fault code are only monitored under the condition that the ignition switch is in "Start Switch to ON Position". This means the system needs to detect a continuous UIM loss signal while the vehicle is powered on; once battery is disconnected or vehicle turns off to OFF position, this fault code may be temporarily masked or enter "Service Required" state.
Diagnostic Trouble Code) generated during the interaction between the vehicle's remote communication module and the diagnostic gateway. This code is specifically used to identify internal communication status anomalies within onboard emergency rescue systems (such as eCall, SOS system). In the system architecture, the SIM card (or UIM card) serves as a core component for identity authentication, responsible for establishing a logical connection between the vehicle control unit and the cellular mobile network. When the diagnostic monitoring unit detects that the physical interface of the SIM card is in a disconnected state, electrical signals are interrupted or the module cannot pass protocol handshakes, the system will automatically lock and record this fault code to indicate a severe barrier in the communication link. This code reflects the control unit's underlying status monitoring