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 RH.
| WARNING | The pretensioner is built into the front seat outer belt RH. Be sure to follow the correct inspection procedure, as failure to follow the correct procedure (such as inspection of incorrect connectors) may activate the pretensioner. |
| DTC No. | DTC Detection Condition | Trouble Area |
|---|
| B2000 | When either of following conditions is met: Short to B+ in seat belt motor RH circuit continues for 1 second or more Short in seat belt motor RH circuit | Wire harness (seat belt control ECU - front seat outer belt RH) Front seat outer belt RH Seat belt control ECU |
Scheme 10
Scheme 10: WIRING DIAGRAM
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 RH.
| WARNING | The pretensioner is built into the front seat outer belt RH. Be sure to follow the correct inspection procedure, as failure to follow the correct procedure (such as inspection of incorrect connectors) may activate the pretensioner. |
| DTC No. | DTC Detection Condition | Trouble Area |
|---|
| B2001 | When either of following conditions is met: Short to ground in seat belt motor RH circuit continues for 1 second or more Short in seat belt motor RH circuit | Wire harness (seat belt control ECU - front seat outer belt RH) Front seat outer belt RH Seat belt control ECU |
The seat belt control ECU receives information from the distance control ECU through CAN communication and tightens the seat by operating the motor in the front seat outer belt RH.
| WARNING | The pretension is built into the front seat outer belt RH. Be sure to follow the correct inspection procedure, as failure to follow the correct procedure (such as inspection of incorrect connectors) may activate the pretension. |
| DTC No. | DTC Detection Condition | Trouble Area |
|---|
| B2002 | Open in seat belt motor RH circuit continues for 1 second or more | Wire harness (seat belt control ECU - front seat outer belt RH) Front seat outer RH Seat belt control ECU |
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 LH.
| WARNING | The pretensioner is built into the front seat outer belt LH. Be sure to follow the correct inspection procedure, as failure to follow the correct procedure (such as inspection of incorrect connectors) may activate the pretensioner. |
| DTC No. | DTC Detection Condition | Trouble Area |
|---|
| B2005 | When either of following conditions is met: Short to B + in seat belt motor LH circuit continues for 1 second or more Short in seat belt motor LH circuit | Wire harness (seat belt control ECU - front seat outer belt LH) Front seat outer belt LH Seat belt control ECU |
Scheme 11
Scheme 11: WIRING DIAGRAM
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 LH.
| WARNING | The pretensioner is built into the front seat outer belt LH. Be sure to follow the correct inspection procedure, as failure to follow the correct procedure (such as inspection of incorrect connectors) may activate the pretensioner. |
| DTC No. | DTC Detection Condition | Trouble Area |
|---|
| B2006 | When one of following conditions is met: Short to ground in seat belt motor LH circuit continues for 1 second or more Short in seat belt motor LH circuit | Wire harness (seat belt control ECU - front seat outer belt LH) Front seat outer belt LH Seat belt control ECU |
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 LH
| WARNING | The pretensioner is built into the front seat outer belt LH. Be sure to follow the correct inspection procedure, as failure to follow the correct procedure (such as inspection of incorrect connectors) may activate the pretensioner. |
| DTC No. | DTC Detection Condition | Trouble Area |
|---|
| B2007 | Open in seat belt motor LH circuit continues for 1 second or more | Wire harness (seat belt control ECU - front seat outer belt LH) Front seat outer 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 | Adherence in power supply relay | 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 inner circuit of 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 is detected, or 2) vehicle information sent from the radar sensor is abnormal. If output, perform initialization on the radar sensor to register the vehicle information to the radar sensor.
| DTC No. | DTC Detection Condition | Trouble Area |
|---|
| B2055 | Radar sensor malfunction is detected or initialization settings are faulty | Millimeter wave radar sensor 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 is detected, or 2) vehicle information sent from the radar sensor is abnormal. If output, perform initialization on the radar sensor to register the vehicle information to the radar sensor.
| DTC No. | DTC Detection Condition | Trouble Area |
|---|
| B2056 | Radar sensor malfunction is detected or initialization settings are faulty | Dynamic radar cruise control system (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 through CAN.
| DTC No. | DTC Detection Condition | Trouble Area |
|---|
| B2057 | Malfunction in yaw rate sensor | Electronically controlled brake system Seat belt control ECU |
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 angle sensor through CAN communication.
| DTC No. | DTC Detection Condition | Trouble Area |
|---|
| B2058 | Malfunction in steering angle sensor is detected | CAN communication system Seat belt control ECU |
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 seat belt 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 skid control ECU is more than specified value | Meter / gauge system CAN communication system Seat belt control ECU |
This DTC is output when a malfunction in the brake system is detected. This circuit consists of the skid control ECU and seat belt control ECU. Signals are sent from the skid control ECU to the seal belt control ECU through the CAN line.
| DTC No. | DTC Detection Condition | Trouble Area |
|---|
| B2060 | Malfunction in brake system is detected | CAN communication system Electronically controlled brake system Seat belt control ECU |
- This circuit consists of the front seat inner belt RH and LH, occupant classification ECU, center airbag sensor and seat belt control ECU.
- When the seat belt RH and LH are fastened, the front seat inner belt RH and LH detect malfunctions in the circuit and sends information to the center airbag sensor.
- The center airbag sensor sends information about the seat belt fastened / unfastened condition and circuit malfunctions through CAN or BEAN communication to the seat belt control ECU.
- The seat belt control ECU uses information from the center airbag sensor 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 and front seat inner belt RH and LH | Front seat inner belt LH Floor wire Center airbag sensor Occupant classification ECU Front seat inner belt RH Multiplex communication system CAN communication system |
Scheme 12
Scheme 12: WIRING DIAGRAM
The seat belt control ECU is connected to the network gateway ECU through the CAN communication.
The seat belt control ECU receives vehicle model information from the network gateway ECU and determines whether the seat belt buckle switch information from the center airbag sensor is for the driver seat or the passenger seat.
DTC B2064 is output when the CAN communication frame with the network gateway ECU is normal and communication is available, but the steering wheel position information is not set or varies.
| DTC No. | DTC Detection Condition | Trouble Area |
|---|
| B2064 | Communication with network gateway ECU is normal and received steering wheel position information is not set (three times in succession) | Network gateway ECU Seat belt control ECU |
| DTC No. | DTC Detection Condition | Trouble Area |
|---|
| B2065 | Distance control ECU setting is faulty | Dynamic radar cruise control system Seat belt control ECU |
The distance control ECU receives signals from the ECM via the CAN communication system.
| DTC Code | DTC Detection Condition | Trouble Area |
|---|
| U0100 | HV ECU communication error | CAN communication system HV ECU Distance control ECU |
| U0293 | HV ECU communication error | CAN communication system HV ECU Distance control ECU |
The seat belt control ECU receives signals from the skid control ECU, gateway ECU, center airbag sensor assembly and distance control ECU via the CAN communication system.
| DTC No. | DTC Detection Item | Inspection Area |
|---|
| 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 |
| U1101 | Distance control ECU communication error | CAN communication system Distance control ECU Seat belt control ECU |
When 2 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.
There may be a malfunction in the power source circuit if either of the following occurs: 1) neither DTCs nor "normal system" codes are output but the pre-collision system is not functioning normally; or 2) DTCs are not output and a "normal system" code is output, but the pre-collision system is not functioning normally.
Scheme 13
Scheme 13: WIRING DIAGRAM
