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.
| CAUTION | 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 |
DIAGNOSTIC TROUBLE CODE TABLE
Scheme 1
Note. When the seat belt control ECU is replaced with a new one, INITIALIZATION must be performed. (See INITIALIZATION )
Scheme 2
Scheme 3
- INSPECT FRONT SEAT OUTER BELT ASSEMBLY RH Disconnect the P8 connector of the front seat outer belt assembly RH. Measure the voltage according to the value(s) in «FRONT SEAT OUTER BELT ASSEMBLY RH»(ref-235580-S13081242382006062400000). Standard voltage FRONT SEAT OUTER BELT ASSEMBLY RH Tester Connection Condition Specified Condition P8-1 - Body ground Engine switch on (IG) Below 1 V P8-2 - Body ground Engine switch on (IG) Below 1 V NG: REPLACE FRONT SEAT OUTER BELT ASSEMBLY RH OK: Go to next step
- CHECK HARNESS AND CONNECTOR (FRONT SEAT OUTER BELT ASSEMBLY RH - SEAT BELT CONTROL ECU) Disconnect the negative (-) battery terminal. Disconnect the O38 connector of the seat belt control ECU. Connect the negative (-) terminal to the battery. Measure the voltage according to the value(s) in «FRONT SEAT OUTER BELT ASSEMBLY RH - SEAT BELT CONTROL ECU»(ref-235580-S27539766662006062400000). Standard voltage FRONT SEAT OUTER BELT ASSEMBLY RH - SEAT BELT CONTROL ECU Tester Connection Condition Specified Condition P8-1 - Body ground Engine switch on (IG) Below 1 V P8-2 - Body ground Engine switch on (IG) Below 1 V NG: REPAIR OR REPLACE HARNESS OR CONNECTOR OK: REPLACE 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 RH.
| CAUTION | 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 |
DTC TABLE
Scheme 4
Note. When the seat belt control ECU is replaced with a new one, INITIALIZATION must be performed. (See INITIALIZATION )
Scheme 5
Scheme 6
- INSPECT FRONT SEAT OUTER BELT ASSEMBLY RH Disconnect the P8 connector of the front seat outer belt assembly RH. Measure the resistance according to the value(s) in «FRONT SEAT OUTER BELT ASSEMBLY RH»(ref-235580-S37061048862006062400000). Standard resistance FRONT SEAT OUTER BELT ASSEMBLY RH Tester Connection Condition Specified Condition P8-1 - Body ground Always 1 M ohms or higher P8-2 - Body ground Always 1 M ohms or higher NG: REPLACE FRONT SEAT OUTER BELT ASSEMBLY RH OK: Go to next step
- CHECK HARNESS AND CONNECTOR (FRONT SEAT OUTER BELT ASSEMBLY RH - SEAT BELT CONTROL ECU) Disconnect the negative (-) battery terminal. Disconnect the O38 connector of the seat belt control ECU. Measure the resistance according to the value(s) in «FRONT SEAT OUTER BELT ASSEMBLY RH - SEAT BELT CONTROL ECU»(ref-235580-S14502571932006062400000). Standard resistance FRONT SEAT OUTER BELT ASSEMBLY RH - SEAT BELT CONTROL ECU Tester Connection Condition Specified Condition P8-1 - Body ground Always 1 M ohms or higher P8-2 - Body ground Always 1 M ohms or higher P8-1 - P8-2 Always 1 M ohms or higher NG: REPAIR OR REPLACE HARNESS OR CONNECTOR OK: REPLACE 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.
| CAUTION | 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 |
DTC TABLE
Scheme 7
Note. When the seat belt control ECU is replaced with a new one, INITIALIZATION must be performed. (See INITIALIZATION )
Scheme 8
Scheme 9
- INSPECT FRONT SEAT OUTER BELT ASSEMBLY RH Disconnect the P8 connector of the front seat outer belt assembly RH. Measure the resistance according to the value(s) in «FRONT SEAT OUTER BELT ASSEMBLY RH»(ref-235580-S41103269082006062400000). Standard resistance FRONT SEAT OUTER BELT ASSEMBLY RH Tester Connection Condition Specified Condition P8-1 - P8-2 Always Below 1 M ohms NG: REPLACE FRONT SEAT OUTER BELT ASSEMBLY RH OK: Go to next step
- CHECK HARNESS AND CONNECTOR (FRONT SEAT OUTER BELT ASSEMBLY RH - SEAT BELT CONTROL ECU) Disconnect the negative (-) battery terminal. Disconnect the O38 connector of the seat belt control ECU. Using a service wire, connect P8-1 and P8-2 of the connector on the front seat outer belt assembly RH side. NOTE: Do not forcibly insert the service wire into the terminals of the connector. Measure the resistance according to the value(s) in «FRONT SEAT OUTER BELT ASSEMBLY RH - SEAT BELT CONTROL ECU»(ref-235580-S09790839022006062400000). Standard resistance FRONT SEAT OUTER BELT ASSEMBLY RH - SEAT BELT CONTROL ECU Tester Connection Condition Specified Condition O38-1 (MOR+) - O38-10 (MOR-) Always Below 1 ohms NG: REPAIR OR REPLACE HARNESS OR CONNECTOR OK: REPLACE 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.
| CAUTION | 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 |
DTC TABLE
Scheme 10
Note. When the seat belt control ECU is replaced with a new one, INITIALIZATION must be performed. (See INITIALIZATION )
Scheme 11
Scheme 12
- INSPECT FRONT SEAT OUTER BELT ASSEMBLY LH Disconnect the O13 connector of the front seat outer belt assembly LH. Measure the voltage according to the value(s) in «FRONT SEAT OUTER BELT ASSEMBLY LH»(ref-235580-S29754112922006062400000). Standard voltage FRONT SEAT OUTER BELT ASSEMBLY LH Tester Connection Condition Specified Condition O13-1 - Body ground Engine switch on (IG) Below 1 V O13-2 - Body ground Engine switch on (IG) Below 1 V NG: REPLACE FRONT SEAT OUTER BELT ASSEMBLY LH OK: Go to next step
- CHECK HARNESS AND CONNECTOR (FRONT SEAT OUTER BELT ASSEMBLY LH - SEAT BELT CONTROL ECU) Disconnect the negative (-) battery terminal. Disconnect the O38 connector of the seat belt control ECU. Connect the negative (-) terminal to the battery. Measure the voltage according to the value(s) in «FRONT SEAT OUTER BELT ASSEMBLY LH - SEAT BELT CONTROL ECU»(ref-235580-S13994447762006062400000). Standard voltage FRONT SEAT OUTER BELT ASSEMBLY LH - SEAT BELT CONTROL ECU Tester Connection Condition Specified Condition O13-1 - Body ground Engine switch on (IG) Below 1 V O13-2 - Body ground Engine switch on (IG) Below 1 V NG: REPAIR OR REPLACE HARNESS OR CONNECTOR OK: REPLACE 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.
| CAUTION | 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 |
DTC TABLE
Scheme 13
Note. When the seat belt control ECU is replaced with a new one, INITIALIZATION must be performed. (See INITIALIZATION )
Scheme 14
Scheme 15
- INSPECT FRONT SEAT OUTER BELT ASSEMBLY LH Disconnect the O13 connector of the front seat outer belt assembly LH. Measure the resistance according to the value(s) in «FRONT SEAT OUTER BELT ASSEMBLY LH»(ref-235580-S25563689982006062400000). Standard resistance FRONT SEAT OUTER BELT ASSEMBLY LH Tester Connection Condition Specified Condition O13-1 - Body ground Always 1 M ohms or higher O13-2 - Body ground Always 1 M ohms or higher NG: REPLACE FRONT SEAT OUTER BELT ASSEMBLY LH OK: Go to next step
- CHECK HARNESS AND CONNECTOR (FRONT SEAT OUTER BELT ASSEMBLY - SEAT BELT CONTROL ECU) Disconnect the negative (-) battery terminal. Disconnect the O38 connector of the seat belt control ECU. Measure the resistance according to the value(s) in «FRONT SEAT OUTER BELT ASSEMBLY - SEAT BELT CONTROL ECU»(ref-235580-S20221442802006062400000). Standard resistance FRONT SEAT OUTER BELT ASSEMBLY - SEAT BELT CONTROL ECU Tester Connection Condition Specified Condition O13-1 - Body ground Always 1 M ohms or higher O13-2 - Body ground Always 1 M ohms or higher O13-1 - O13-2 Always 1 M ohms or higher NG: REPAIR OR REPLACE HARNESS OR CONNECTOR OK: REPLACE 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.
| CAUTION | 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 |
DTC TABLE
Scheme 16
Note. When the seat belt control ECU is replaced with a new one, INITIALIZATION must be performed. (See INITIALIZATION )
Scheme 17
Scheme 18
- INSPECT FRONT SEAT OUTER BELT ASSEMBLY LH Disconnect the connector O13 of the front seat outer belt assembly LH. Measure the resistance according to the value(s) in «FRONT SEAT OUTER BELT ASSEMBLY LH»(ref-235580-S22580804532006062400000). Standard resistance FRONT SEAT OUTER BELT ASSEMBLY LH Tester Connection Condition Specified Condition O13-1 - O13-2 Always Below 1 M ohms NG: REPLACE FRONT SEAT OUTER BELT ASSEMBLY LH OK: Go to next step
- CHECK HARNESS AND CONNECTOR (FRONT SEAT OUTER BELT ASSEMBLY LH - SEAT BELT CONTROL ECU) Disconnect the negative (-) battery terminal. Disconnect the connector O38 of the seat belt control ECU. Using a service wire, connect O13-1 and O13-2 of the connector on the front seat outer belt assembly LH side. NOTE: Do not forcibly insert the service wire into the terminals of the connector. Measure the resistance according to the value(s) in «FRONT SEAT OUTER BELT ASSEMBLY LH - SEAT BELT CONTROL ECU»(ref-235580-S19155938502006062400000). Standard resistance FRONT SEAT OUTER BELT ASSEMBLY LH - SEAT BELT CONTROL ECU Tester Connection Condition Specified Condition O38-2 (MOL+) - O38-11 (MOL-) Always Below 1 ohms NG: REPAIR OR REPLACE HARNESS OR CONNECTOR OK: REPLACE 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 |
| B2036 | Open 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 |
DTC TABLE
Note. When the seat belt control ECU is replaced with a new one, INITIALIZATION must be performed. (See INITIALIZATION )
The DTC is output during the power supply relay adherence malfunction in the seat belt control ECU.
| DTC No. | DTC Detection Condition | Trouble Area |
|---|---|---|
| B2035 | Adherence in power supply relay | Wire harness Seat belt control ECU |
DTC TABLE
Scheme 19
Note. When the seat belt control ECU is replaced with a new one, INITIALIZATION must be performed. (See INITIALIZATION )
Scheme 20
Scheme 21
- INSPECT FRONT SEAT OUTER BELT ASSEMBLY RH Disconnect the P8 connector of the front seat outer belt assembly RH. Measure the voltage according to the value(s) in «FRONT SEAT OUTER BELT ASSEMBLY RH»(ref-235580-S03893385792006062400000). Standard voltage FRONT SEAT OUTER BELT ASSEMBLY RH Tester Connection Condition Specified Condition P8-1 - Body ground Engine switch on (IG) Below 1 V P8-2 - Body ground Engine switch on (IG) Below 1 V NG: REPLACE FRONT SEAT OUTER BELT ASSEMBLY RH OK: Go to next step
- CHECK HARNESS AND CONNECTOR (FRONT SEAT BELT ASSEMBLY RH - SEAT BELT CONTROL ECU) Disconnect the negative (-) battery terminal. Disconnect the O38 connector of the seat belt control ECU. Connect the negative (-) terminal to the battery. Measure the voltage according to the value(s) in «FRONT SEAT BELT ASSEMBLY RH - SEAT BELT CONTROL ECU»(ref-235580-S09708517212006062400000). Standard voltage FRONT SEAT BELT ASSEMBLY RH - SEAT BELT CONTROL ECU Tester Connection Condition Specified Condition P8-1 - Body ground Engine switch on (IG) Below 1 V P8-2 - Body ground Engine switch on (IG) Below 1 V NG: REPAIR OR REPLACE HARNESS OR CONNECTOR OK: Go to next step
- CHECK DTC OUTPUT Turn the engine switch on (IG). Clear the DTCs stored in memory (See «TERMINALS OF ECU»(ref-235580-S10160782902006062400000) ). Turn the engine switch off. Turn the engine switch on (IG). Check for the DTCs (See «TERMINALS OF ECU»(ref-235580-S10160782902006062400000) ). OK: No DTC is output. NG: REPLACE SEAT BELT CONTROL ECU OK: USE SIMULATION METHOD TO CHECK
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 |
DTC TABLE
Note. When the seat belt control ECU is replaced with a new one, INITIALIZATION must be performed. (See INITIALIZATION )
| 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 |
DTC TABLE
Note. When the seat belt control ECU is replaced with a new one, INITIALIZATION must be performed. (See INITIALIZATION )
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 |
DTC TABLE
Note. When the seat belt control ECU is replaced with a new one, INITIALIZATION must be performed. (See INITIALIZATION )
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 |
DTC TABLE
Note. When the seat belt control ECU is replaced with a new one, INITIALIZATION must be performed. (See INITIALIZATION )
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 ABS & traction actuator assembly is more than specified value | Combination meter assembly ECM Skid control ECU Distance control ECU Seat belt control ECU |
DTC TABLE
Note. When the distance control ECU is replaced with a new one, INITIALIZATION must be performed. (See INITIALIZATION )
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 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 |
DTC TABLE
Note. When the seat belt control ECU is replaced with a new one, INITIALIZATION must be performed. (See INITIALIZATION )
- This circuit consists of the front seat inner belt assembly RH, front seat inner belt assembly LH, center airbag sensor assembly 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 seat belt control 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 Seat belt control ECU |
DTC TABLE
Scheme 22
Note. When the seat belt control ECU is replaced with a new one, INITIALIZATION must be performed. (See INITIALIZATION )
Scheme 23
Scheme 24
Scheme 25
Scheme 26
- CHECK DTC OUTPUT (CAN COMMUNICATION SYSTEM) Delete the DTC (See «TERMINALS OF ECU»(ref-235580-S10160782902006062400000) ). Check that the DTC U0151 is not output. OK: DTC U0151 is not output. NG: GO TO «CAN COMMUNICATION SYSTEM»(ref-235565-S22980917632006062400000) OK: Go to next step
- CHECK DTC OUTPUT (SUPPLEMENTAL RESTRAINT SYSTEM) Delete the DTC (See «TERMINALS OF ECU»(ref-235580-S10160782902006062400000) ). Check that the DTC B1655 is not output. OK: DTC B1655 is not output. NG: GO TO «SUPPLEMENTAL RESTRAINT SYSTEM»(/lexus/is/ii-2005-2008/remont/oem-general-information/#preparation) OK: Go to next step
- READ VALUE OF INTELLIGENT TESTER Connect the intelligent tester (with CAN VIM) to the DLC3. Turn the engine switch on (IG) and the turn the intelligent tester main switch on. Select P BUCKLE Switch in the DATA LIST and read the value displayed on the intelligent tester. DATA LIST REFERENCE TABLE Item Measurement Item/Range (Display) Normal Condition Diagnostic Note P BUCKLE Switch Buckle switch status of passenger's seat/ UNSET: Unfasten passenger side seat belt SET: Fasten passenger side seat belt NG: Indeterminate date UNSET / SET - OK: SET (Fasten passenger side seat belt) appears on the tester. OK: REPLACE SEAT BELT CONTROL ECU NG: Go to next step
- CHECK HARNESS AND CONNECTOR (SEAT BELT CONTROL ECU - FRONT SEAT BELT ASSEMBLY RH) Disconnect the negative (-) battery terminal and wait at least 90 seconds. HINT: Make sure that the engine switch is off before disconnecting the cable. Disconnect the P4 belt and O38 ECU connectors. Using a service wire, connect terminals PBK+ and PBK of connector P4. Measure the resistance according to the value(s) in «SEAT BELT CONTROL ECU - FRONT SEAT BELT ASSEMBLY RH»(ref-235580-S28022063322006062400000). Standard resistance SEAT BELT CONTROL ECU - FRONT SEAT BELT ASSEMBLY RH Tester Connection Condition Specified Condition O38-14 (PBK+) - O38-12 (PBK-) Always Below 1 ohms NG: REPAIR OR REPLACE HARNESS OR CONNECTOR OK: Go To Next Step
- CHECK HARNESS AND CONNECTOR (SEAT BELT CONTROL ECU - FRONT SEAT INNER BELT ASSEMBLY RH) Measure the resistance according to the value(s) in «SEAT BELT CONTROL ECU - FRONT SEAT INNER BELT ASSEMBLY RH»(ref-235580-S03226815732006062400000). Standard resistance SEAT BELT CONTROL ECU - FRONT SEAT INNER BELT ASSEMBLY RH Tester Connection Condition Specified Condition O38-14 (PBK+) - Body ground Always 1 k ohms or higher O38-12 (PBK-) - Body ground Always 1 k ohms or higher NG: REPAIR OR REPLACE HARNESS OR CONNECTOR OK: Go to next step
- CHECK HARNESS AND CONNECTOR (SEAT BELT CONTROL ECU - FRONT SEAT INNER BELT ASSEMBLY RH) Measure the resistance according to the value(s) in «SEAT BELT CONTROL ECU - FRONT SEAT INNER BELT ASSEMBLY RH»(ref-235580-S34843043692006062400000). Standard resistance SEAT BELT CONTROL ECU - FRONT SEAT INNER BELT ASSEMBLY RH Tester Connection Condition Specified Condition O38-14 (PBK+) - O38-12 (PBK-) Always 1 k ohms or higher NG: REPAIR OR REPLACE HARNESS OR CONNECTOR OK: Go to next step
- CHECK HARNESS AND CONNECTOR (SEAT BELT CONTROL ECU - FRONT SEAT INNER BELT ASSEMBLY RH) Connect the negative (-) battery terminal, and turn the engine switch on (IG). Measure the voltage according to the value(s) in «SEAT BELT CONTROL ECU - FRONT SEAT INNER BELT ASSEMBLY RH»(ref-235580-S39672773252006062400000). Standard voltage SEAT BELT CONTROL ECU - FRONT SEAT INNER BELT ASSEMBLY RH Tester Connection Condition Specified Condition O38-14 (PBK+) - Body ground Always Below 1 V O38-12 (PBK-) - Body ground Always Below 1 V NG: REPAIR OR REPLACE HARNESS OR CONNECTOR OK: Go to next step
- CHECK DTC OUTPUT (PRE-COLLISION SYSTEM) Disconnect the negative (-) battery terminal and wait at least 90 seconds. Connect the connectors from the center airbag sensor assembly and front seat inner belt assembly RH. Connect the cable to the negative (-) battery terminal and turn the engine switch on (IG). Then wait 60 seconds. Delete the DTC (See «TERMINALS OF ECU»(ref-235580-S10160782902006062400000) ). Recheck for DTC. OK: DTC B2063 is not output. OK: USE SIMULATION METHOD TO CHECK NG: Go to next step
- REPLACE FRONT SEAT INNER BELT ASSEMBLY RH Disconnect the negative (-) battery terminal and wait at least 90 seconds. Replace the front seat inner belt assembly RH (See «REMOVAL»(ref-235573-S11624302162006062400000) ).
- CHECK DTC OUTPUT (PRE-COLLISION SYSTEM) Connect the negative (-) battery terminal and turn the engine switch on (IG). Then wait 60 seconds. Delete the DTC (See «TERMINALS OF ECU»(ref-235580-S10160782902006062400000) ). Recheck for DTC. OK: DTC B2063 is not output. NG: REPLACE SEAT BELT CONTROL ECU OK: END
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 TABLE
Note. When the seat belt control ECU is replaced with a new one, INITIALIZATION must be performed. (See INITIALIZATION )
| DTC No. | DTC Detection Condition | Trouble Area |
|---|---|---|
| B2065 | Distance control ECU assembly setting is faulty | Distance control ECU Seat belt control ECU |
DTC TABLE
Note. When the seat belt control ECU is replaced with a new one, Active Test must be performed. (See DATA LIST / ACTIVE TEST )
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 |
DTC TABLE
HINT
When two or more DTCs starting with "U " are output simultaneously, inspect the connectors and wire harness of each ECU.
Refer to the U0100 (CAN communication system) (See ECM COMMUNICATION STOP MODE ).
Refer to the U0122 (CAN communication system) (See SKID CONTROL ECU COMMUNICATION STOP MODE ).
Refer to the U0146 (CAN communication system) (See GATEWAY ECU COMMUNICATION STOP MODE ).
Refer to the U0151 (CAN communication system) (See CENTER AIRBAG SENSOR COMMUNICATION STOP MODE ).
Refer to the U1101 (CAN communication system) (See DISTANCE CONTROL ECU COMMUNICATION STOP MODE ).
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 |
DTC TABLE
Refer to the U0235 (Dynamic radar cruise control system) (See DTC U0235 LOST COMMUNICATION WITH CRUISE CONTROL FRONT DISTANCE RANGE SENSOR ).
Refer to the U1102 (Dynamic radar cruise control system) (See DTC U1102 LOST COMMUNICATION WITH RADAR SENSOR ).
This circuit supplies power to the seat belt control ECU.
Scheme 27
Note. When the seat belt control ECU is replaced with a new one, INITIALIZATION must be performed. (See INITIALIZATION )
Scheme 28
Scheme 29
- CHECK HARNESS AND CONNECTOR (POWER SOURCE CIRCUIT) Disconnect the negative (-) terminal cable from the battery. Disconnect the O38 seat belt control ECU connector. Connect the negative (-) terminal cable to the battery. Measure the voltage according to the value (s) in «POWER SOURCE CIRCUIT»(ref-235580-S05703112392006062400000). Standard voltage POWER SOURCE CIRCUIT Tester Connection Condition Specified Condition O38-3 (IG1) - Body ground Engine switch off Below 1 V Engine switch on (IG) 10 to 14 V O38-9 (+B) - Body ground Always 10 to 14 V NG: REPAIR OR REPLACE HARNESS OR CONNECTOR OK: Go to next step
- CHECK HARNESS AND CONNECTOR (GROUND CIRCUIT) Disconnect the negative (-) terminal cable from the battery. Measure the resistance according to the value (s) in «GROUND CIRCUIT»(ref-235580-S14571054762006062400000). Standard resistance GROUND CIRCUIT Tester Connection Condition Specified Condition O38-18 (PGND) - Body ground Always Below 1 ohms NG: REPAIR OR REPLACE HARNESS OR CONNECTOR OK: REPLACE SEAT BELT CONTROL ECU
See also:
• ENGINE CONTROL SYSTEM