DESCRIPTION
The seat belt control ECU receives information from the seat belt control ECU (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 activate the pretensioner. DTC No. DTC Detection Condition Trouble Area B2000 When either of following conditions is met: 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 |
| DTC No. | DTC Detection Condition | Trouble Area |
|---|---|---|
| B2000 | When either of following conditions is met: 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 10
The seat belt control ECU receives information from the seat belt control ECU (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 activate the pretensioner. DTC No. DTC Detection Condition Trouble Area B2001 When either of following conditions is met: Short 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 |
| DTC No. | DTC Detection Condition | Trouble Area |
|---|---|---|
| B2001 | When either of following conditions is met: Short 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 seat belt control ECU (distance control ECU) through CAN communication and tightens the seat by operating the motor in the front seat outer belt assembly RH.
| WARNING | The pretension 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 activate the pretension. |
| 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 seat belt control ECU (distance control ECU) through 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 activate 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 |
| 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 11
The seat belt control ECU receives information from the seat belt control ECU (distance control ECU) through 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 activate 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 |
| 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 seat belt control ECU (distance control ECU) through 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 activate 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 |
| 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 | 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 the inner circuit of the pre-collision safety 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 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 assembly malfunction is detected or initialization settings are faulty | Millimeter wave radar sensor assembly (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 | Yaw rate sensor 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 sensor through CAN communication.
| DTC No. | DTC Detection Condition | Trouble Area |
|---|---|---|
| B2058 | Malfunction in steering angle sensor is detected | Steering angle sensor Seat belt control ECU |
The from distance control ECU uses the combination meter to send vehicle speed information to the ECM. The ECM and the ABS & traction actuator assembly 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 ABS & traction actuator assembly 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 | Combination meter assembly ECM Skid control ECU Cruise control ECU assembly (Distance control ECU) 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 through the CAN line.
| DTC No. | DTC Detection Condition | Trouble Area |
|---|---|---|
| B2060 | Malfunction in brake system is detected | Electronically controlled brake system Vehicle stability control system Seat belt control ECU |
- This circuit consists of the front seat inner belt assembly RH and LH, occupant classification ECU, center airbag sensor assembly and seat belt control ECU.
- When the driver side seat belt is fastened, the front seat inner belt assembly LH detects malfunctions in the circuit and sends information to the center airbag sensor assembly.
- When the passenger side seat belt is fastened, the front seat inner belt assembly RH detects malfunctions in the circuit and sends information to the center airbag sensor assembly.
- The center airbag sensor assembly 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 assembly to control the pre-collision safety 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 RH and LH | Front seat inner belt assembly LH Floor wire Center airbag sensor assembly Occupant classification ECU Front seat inner belt assembly RH Multiplex communication system CAN communication system |
Scheme 12
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 assembly 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 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) | Network gateway ECU Seat belt control ECU |
| DTC No. | DTC Detection Condition | Trouble Area |
|---|---|---|
| B2065 | Distance control ECU assembly setting is faulty | Dynamic radar cruise control system Seat belt 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.
The distance control ECU receives signals from the ECM via the CAN communication system.
| DTC No. | DTC Detection Item | Trouble 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 |
| U1101 | Distance control ECU communication error | CAN communication system Distance control ECU Seat belt control ECU |
HINT
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 through 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.
HINT
There may be a malfunction in the power source circuit if either: 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.
