DESCRIPTION
The seat belt control ECU receives information from the distance control ECU through CAN communication and tightens the seat belt by operating the motor in the front seat outer belt assembly RH.
| WARNING | The pretensioner is built into the front seat outer belt assembly RH. Be sure to follow the correct inspection procedure, as failure to follow the correct procedure (such as inspection of incorrect connectors) may deploy the pretensioner. |
| DTC No. | DTC Detection Condition | Trouble Area |
|---|
| B2000 | Short to B+ in the seat belt motor RH circuit continues for 1 second or more Short in the seat belt motor RH circuit | Front seat outer belt assembly RH Wire harness (seat belt control ECU - front seat outer belt assembly RH) Seat belt control ECU |
Scheme 12
Scheme 12: WIRING DIAGRAM
The seat belt control ECU receives information from the distance control ECU using CAN communication and tightens the seat belt by operating the motor in the front seat outer belt assembly RH.
| WARNING | The pretensioner is built into the front seat outer belt assembly RH. Be sure to follow the correct inspection procedure, as failure to follow the correct procedure (such as inspection of incorrect connectors) may deploy the pretensioner. |
| DTC No. | DTC Detection Condition | Trouble Area |
|---|
| B2001 | Short to ground in seat belt motor RH circuit continues for 1 second or more Short in seat belt motor RH circuit | Front seat outer belt assembly RH Wire harness (seat belt control ECU - front seat outer belt assembly RH) Seat belt control ECU |
The seat belt control ECU receives information from the distance control ECU using CAN communication and tightens the seat by operating the motor in the front seat outer belt assembly RH.
| WARNING | The pretensioner is built into the front seat outer belt assembly RH. Be sure to follow the correct inspection procedure, as failure to follow the correct procedure (such as inspection of incorrect connectors) may deploy the pretensioner. |
| DTC No. | DTC Detecting Condition | Trouble Area |
|---|
| B2002 | Open in the seat belt motor RH circuit continues for 1 second or more | Front seat outer assembly RH Wire harness (seat belt control ECU - front seat outer belt assembly RH) Seat belt control ECU |
The seat belt control ECU receives information from the distance control ECU using CAN communication and tightens the seat belt by operating the motor in the front seat outer belt assembly LH.
| WARNING | The pretensioner is built into the front seat outer belt assembly LH. Be sure to follow the correct inspection procedure, as failure to follow the correct procedure (such as inspection of incorrect connectors) may deploy the pretensioner. |
| DTC No. | DTC Detection Condition | Trouble Area |
|---|
| B2005 | Short to B+ in seat belt motor LH circuit continues for 1 second or more Short in seat belt motor LH circuit | Front seat outer belt assembly LH Wire harness (seat belt control ECU - front seat outer belt assembly LH) Seat belt control ECU |
Scheme 13
Scheme 13: WIRING DIAGRAM
The seat belt control ECU receives information from the distance control ECU using CAN communication and tightens the seat belt by operating the motor in the front seat outer belt assembly LH.
| WARNING | The pretensioner is built into the front seat outer belt assembly LH. Be sure to follow the correct inspection procedure, as failure to follow the correct procedure (such as inspection of incorrect connectors) may deploy the pretensioner. |
| DTC No. | DTC Detection Condition | Trouble Area |
|---|
| B2006 | Short to ground in seat belt motor LH circuit continues for 1 second or more Short in seat belt motor LH circuit | Front seat outer belt assembly LH Wire harness (seat belt control ECU - front seat outer belt assembly LH) Seat belt control ECU |
The seat belt control ECU receives information from the distance control ECU using CAN communication and tightens the seat belt by operating the motor in the front seat outer belt assembly LH.
| WARNING | The pretensioner is built into the front seat outer belt assembly LH. Be sure to follow the correct inspection procedure, as failure to follow the correct procedure (such as inspection of incorrect connectors) may deploy the pretensioner. |
| DTC No. | DTC Detection Condition | Trouble Area |
|---|
| B2007 | Open in seat belt motor LH circuit continues for 1 second or more | Front seat outer assembly LH Wire harness (seat belt control ECU - front seat outer belt assembly LH) Seat belt control ECU |
The DTCs above are output during the seat belt control ECU's self diagnosis.
| DTC No. | DTC Detection Condition | Trouble Area |
|---|
| B2015 | Open in right side upper MOS | Seat belt control ECU |
| B2016 | Open in right side lower MOS | Seat belt control ECU |
| B2020 | Open in left side upper MOS | Seat belt control ECU |
| B2021 | Open in left side lower MOS | Seat belt control ECU |
| B2025 | Malfunction in right side current detection HI circuit | Seat belt control ECU |
| B2026 | Malfunction in right side current detection LO circuit | Seat belt control ECU |
| B2027 | Over-current in right side circuit | Seat belt control ECU |
| B2030 | Malfunction in left side current detection HI circuit | Seat belt control ECU |
| B2031 | Malfunction in left side current detection LO circuit | Seat belt control ECU |
| B2032 | Over-current in left side circuit | Seat belt control ECU |
| B2035 | Power supply relay malfunction | Seat belt control ECU |
| B2040 | EEPROM malfunction | Seat belt control ECU |
| B2041 | Decline in raised voltage | Seat belt control ECU |
| B2043 | Fall of B+ Voltage | Seat belt control ECU |
| B2047 | Malfunction in the inner circuit of the seat belt control ECU | Seat belt control ECU |
If the seat belt control ECU judges that there is a malfunction in its internal circuit as a result of self-diagnosis, or if the power source voltage (+B) is not input to the seat belt control ECU, this DTC will be stored.
| DTC No. | DTC Detection Condition | Trouble Area |
|---|
| B2036 | Malfunction in seat belt control ECU Power source voltage (+B) is not input to the seat belt control ECU. | Harness or connector PSB fuse Seat belt control ECU |
This DTC is output when one of the following occurs: 1) an error in communication with the millimeter wave radar sensor assembly is detected, or 2) vehicle information sent from the radar sensor assembly is abnormal. If output, perform initialization on the radar sensor assembly to register the vehicle information to the radar sensor assembly.
| DTC No. | DTC Detection Condition | Trouble Area |
|---|
| B2055 | Radar sensor assembly malfunction is detected or initialization settings are faulty | Millimeter wave radar sensor Seat belt control ECU |
This DTC is stored when the millimeter wave radar sensor beam axis does not match the direction of vehicle travel. DTC B2056 for the pre-collision system or DTC P1572 for the dynamic radar cruise control system will be stored unless radar sensor adjustment is performed after the millimeter wave radar sensor assembly is installed.
| DTC No. | DTC Detection Condition | Trouble Area |
|---|
| B2056 | Radar sensor assembly malfunction is detected or initialization settings are faulty | Millimeter wave radar sensor (axial adjustment) Seat belt control ECU |
This DTC is output when a malfunction in the yaw rate sensor is detected. This circuit consists of the yaw rate sensor and seat belt control ECU. Signals are sent from the yaw rate sensor using CAN communication.
| DTC No. | DTC Detection Condition | Trouble Area |
|---|
| B2057 | Malfunction in yaw rate sensor | Yaw rate sensor Seat belt control ECU |
Scheme 14
Scheme 14: WIRING DIAGRAM
This DTC is output when a malfunction in the steering angle sensor is detected. This circuit consists of the steering angle sensor and seat belt control ECU. Signals are sent from the steering sensor using CAN communication.
| DTC No. | DTC Detection Condition | Trouble Area |
|---|
| B2058 | Malfunction in steering angle sensor is detected | Steering angle sensor Seat belt control ECU |
Scheme 15
Scheme 15: WIRING DIAGRAM
The distance control ECU uses the combination meter to send vehicle speed information to the ECM. The ECM and the skid control ECU use CAN communication to send vehicle speed information to the distance control ECU. This DTC is output when the difference between the vehicle speed information from the ECM and the skid control ECU is more than the specified value.
| DTC No. | DTC Detection Condition | Trouble Area |
|---|
| B2059 | Difference between vehicle speed information from ECM and brake actuator assembly is more than specified value | Combination meter assembly ECM Skid control ECU Distance control ECU Seat belt control ECU |
Scheme 16
Scheme 16: WIRING DIAGRAM
This DTC is output when a malfunction in the vehicle stability control system is detected. This circuit consists of the skid control ECU and seat belt control ECU. Signals are sent from the skid control ECU using the CAN communication.
| DTC No. | DTC Detection Condition | Trouble Area |
|---|
| B2060 | Malfunction in brake system is detected | Skid control ECU Seat belt control ECU |
- This circuit consists of the front seat inner belt assembly RH, front seat inner belt assembly LH, center airbag sensor assembly, occupant classification ECU and seat belt control ECU.
- When the driver side seat belt is fastened to the front seat inner belt assembly LH, the center airbag sensor assembly detects malfunctions in the circuit.
- When the passenger side seat belt is fastened to the front seat inner belt assembly RH, the occupant classification ECU detects malfunctions in the circuit.
- The center airbag sensor assembly sends information about the seat belt fastened/unfastened condition and circuit malfunctions through CAN communication to the seat belt control ECU.
- The seat belt control ECU uses information from the center airbag sensor assembly to control the pre-collision system.
| DTC No. | DTC Detection Condition | Trouble Area |
|---|
| B2063 | Open, short, +B short or body ground short between terminals of center airbag sensor assembly and front seat inner belt assembly LH Open, short, +B short or body ground short between terminals of seat belt control ECU and front seat inner belt assembly RH | Front seat inner belt assembly RH Front seat inner belt assembly LH Harness and connector Floor wire Seat belt control ECU Center airbag sensor Occupant classification ECU CAN communication system |
Scheme 17
Scheme 17: WIRING DIAGRAM
The seat belt control ECU is connected to the gateway ECU using CAN communication.
The seat belt control ECU receives vehicle model information from the gateway ECU and determines whether the seat belt buckle switch information from the center airbag sensor assembly is for the driver seat or the passenger seat.
DTC B2064 is output when the CAN communication frame with the gateway ECU is normal and communication is available, but the steering wheel position information is not set or varies.
| DTC No. | DTC Detecting Condition | Trouble Area |
|---|
| B2064 | Communication with the network gateway ECU is normal and received steering wheel position information is not set (three times in succession) | Gateway ECU Seat belt control ECU |
| DTC No. | DTC Detection Condition | Trouble Area |
|---|
| B2065 | Distance control ECU assembly setting is faulty | Distance control ECU Seat belt control ECU |
The seat belt control ECU receives signals from the skid control ECU and gateway ECU and center airbag sensor assembly and distance control ECU via CAN communication system.
The distance control ECU receives signals from the ECM via CAN communication system.
| DTC No. | DTC Detection Item | Inspection Area |
|---|
| U0100 | ECM communication error | CAN communication system ECM Distance control ECU |
| U0122 | Skid control ECU communication error | CAN communication system Skid control ECU Seat belt control ECU |
| U0146 | Network gateway ECU communication error | CAN communication system Gateway ECU Seat belt control ECU |
| U0151 | Center airbag sensor communication error | CAN communication system Center airbag sensor assembly Seat belt control ECU |
| U1101 | Distance control ECU communication error | CAN communication system Distance control ECU Seat belt control ECU |
When two or more DTCs starting with "U" are output simultaneously, inspect the connectors and wire harness of each ECU.
The millimeter wave radar sensor and distance control ECU transmit the data for general vehicle control and diagnosis function along the communication line.
| DTC No. | DTC Detection Condition | Trouble Area |
|---|
| U0235 | ECM detects communication error signal from millimeter wave radar sensor to distance control ECU for 0.15 sec. or more while dynamic radar cruise control is in operation. | Communication circuit Millimeter wave radar sensor Distance control ECU |
| U1102 | ECM detects communication error signal (from distance control ECU to millimeter wave radar sensor to distance control ECU) for 0.15 sec. or more while dynamic radar cruise control is in operation. | Communication circuit Millimeter wave radar sensor Distance control ECU |
This circuit supplies power to the seat belt control ECU.
Scheme 18
Scheme 18: WIRING DIAGRAM
