Occupant Classification System (Diagnostic Codes): Diagnosis Lexus GS III facelift

INSPECTION PROCEDURE

HINT

1. If troubleshooting (wire harness inspection) is difficult to perform, remove the front passenger seat installation bolts to see the undersurface of the seat cushion.
2. In the above case, hold the seat so that it does not fall down. Holding the seat for a long period of time may cause a problem, such as seat rail deformation. Hold the seat only as necessary.

Scheme 349

1. CHECK FOR DTC Turn the engine switch on (IG). Clear the DTCs stored in the occupant classification ECU. Refer to «DTC CHECK / CLEAR»(ref-382823-S34104451062011012800000) . Clear the DTCs stored in the center airbag sensor. Refer to «DTC CHECK / CLEAR»(ref-382572-S09867252302011012800000) . Turn the engine switch off. Turn the engine switch on (IG). Check for the DTCs. Refer to «DTC CHECK / CLEAR»(ref-382823-S34104451062011012800000) . OK DTC B1771 is not output. HINT: Codes other than B1771 may be output at this time, but they are not related to this check. NG --> See step 2 OK --> See step 9
2. CHECK CONNECTION OF CONNECTOR Turn the engine switch off. Disconnect the negative (-) terminal cable from the battery, and wait for at least 90 seconds. Check that the connectors are properly connected to the occupant classification ECU and the front seat inner belt RH. OK Connectors are properly connected. NG --> CONNECT CONNECTORS PROPERLY OK: Go to next step
3. CHECK CONNECTOR Disconnect the connectors from the occupant classification ECU and front seat inner belt RH. Check that the connectors (on the center airbag sensor side and front seat inner belt RH) are not damaged. OK Connectors are not deformed or damaged. HINT: If the connectors are not connected securely, reconnect the connectors and proceed to the next inspection. NG --> REPAIR OR REPLACE FRONT SEAT WIRE RH OK: Go to next step
4. CHECK FRONT SEAT WIRE RH Connect the negative (-) terminal cable to the battery. Turn the engine switch on (IG). Measure the voltage according to the value(s) in the table below. Standard voltage Tester connection Switch Condition Specified condition a17-13 (BSW) - Body ground Engine switch on (IG) Below 1 V a17-14 (BGND) - Body ground Turn the engine switch off. Disconnect the negative (-) terminal cable from the battery, and wait for at least 90 seconds. Using a service wire, connect terminals 1 (RBE-) and 2 (RBE+) of connector C. NOTE: Do not forcibly insert the service wire into the terminals of the connector when connecting the wire. Measure the resistance according to the value(s) in the table below. Standard resistance Tester connection Switch Condition Specified condition a17-13 (BSW) - a17-14 (BGND) Always Below 1 ohms Disconnect the service wire from connector C. Measure the resistance according to the value(s) in the table below. Standard resistance Tester connection Switch Condition Specified condition a17-13 (BSW) - Body ground Always 1 Mohms or higher a17-14 (BGND) - Body ground a17-13 (BSW) - a17-14 (BGND) NG --> REPAIR OR REPLACE FRONT SEAT WIRE RH OK: Go to next step
5. CHECK FOR DTC Connect the connectors to the occupant classification ECU and the front seat inner belt assembly RH. Connect the negative (-) terminal cable to the battery. Turn the engine switch on (IG). Clear the DTCs stored in the occupant classification ECU. Refer to «DTC CHECK / CLEAR»(ref-382823-S34104451062011012800000) . Clear the DTCs stored in the center airbag sensor. Refer to «DTC CHECK / CLEAR»(ref-382572-S09867252302011012800000) Turn the engine switch off. Turn the engine switch on (IG). Check for the DTCs. Refer to «DTC CHECK / CLEAR»(ref-382823-S34104451062011012800000) . OK DTC B1771 is not output. HINT: Codes other than B1771 may be output at this time, but they are not related to this check. NG --> See step 6 OK --> See step 9
6. REPLACE FRONT SEAT INNER BELT ASSEMBLY RH (PASSENGER SIDE BUCKLE SWITCH) Turn the engine switch off. Disconnect the negative (-) terminal cable from the battery, and wait for at least 90 seconds. Replace the front seat inner belt RH. Refer to «REMOVAL»(ref-382587-S32282187642011012800000) . HINT: Perform the inspection using parts from a normal vehicle if possible. Connect the negative (-) terminal cable to the battery. Turn the engine switch on (IG). Clear the DTCs stored in the occupant classification ECU. Refer to «DTC CHECK / CLEAR»(ref-382823-S34104451062011012800000) . Clear the DTCs stored in the center airbag sensor. Refer to «DTC CHECK / CLEAR»(ref-382572-S09867252302011012800000) Turn the engine switch off. Turn the engine switch on (IG). Check for the DTCs. Refer to «DTC CHECK / CLEAR»(ref-382823-S34104451062011012800000) . OK DTC B1771 is not output. HINT: Codes other than B1771 may be output at this time, but they are not related to this check. NG --> See step 7 OK --> END
7. REPLACE OCCUPANT CLASSIFICATION ECU Connect the Techstream to the DLC3. Turn the engine switch on (IG). Using the Techstream, save the ECU data from the ECU which has been installed on the vehicle. Refer to «REGISTRATION»(ref-382823-S22337285132011012800000) . Turn the engine switch off. Disconnect the negative (-) terminal cable from the battery, and wait for at least 90 seconds. Replace the occupant classification ECU. Refer to «DISASSEMBLY»(ref-382755-S28249673532011012800000) . Connect the negative (-) terminal cable to the battery. Turn the engine switch on (IG). Using the Techstream, load the previous ECU data stored into the new ECU. Refer to «REGISTRATION»(ref-382823-S22337285132011012800000) . Turn the engine switch off. Turn the engine switch on (IG). Clear the DTCs stored in the memory. Refer to «DTC CHECK / CLEAR»(ref-382823-S34104451062011012800000) . HINT: If DTC is not cleared at this time, past DTC will remain. NEXT: Go to next step
8. PERFORM SENSITIVITY CHECK Perform the sensitivity check. Refer to «INITIALIZATION»(ref-382823-S13703721832011012800000) . NEXT --> END
9. USE SIMULATION METHOD TO CHECK. Refer to «DIAGNOSIS SYSTEM»(ref-382823-S39243012562011012800000)

HINT

1. If troubleshooting (wire harness inspection) is difficult to perform, remove the passenger seat installation bolts to see the undersurface of the seat cushion.
2. In the above case, hold the seat so that it does not fall down. Holding the seat for a long period of time may cause a problem, such as seat rail deformation. Hold the seat only as necessary.

Scheme 350

1. CHECK FOR DTC Turn the engine switch on (IG). Clear the DTCs stored in the occupant classification ECU. Refer to «DTC CHECK / CLEAR»(ref-382823-S34104451062011012800000) . Clear the DTCs stored in the center airbag sensor. Refer to «DTC CHECK / CLEAR»(ref-382572-S09867252302011012800000) . Turn the engine switch off. Turn the engine switch on (IG). Check for the DTCs. Refer to «DTC CHECK / CLEAR»(ref-382823-S34104451062011012800000) . OK DTC B1773 and B1776 are not output. HINT: Codes other than B1773 and B1776 may be output at this time, but they are not related to this check. NG --> See step 2 OK --> See step 9
2. CHECK CONNECTION OF CONNECTOR Turn the engine switch off. Disconnect the negative (-) terminal cable from the battery, and wait for at least 90 seconds. Check that the connectors are properly connected to the occupant classification ECU and the seat belt tension sensor. OK Connectors are properly connected. NG --> CONNECT CONNECTORS PROPERLY OK: Go to next step
3. CHECK CONNECTOR Disconnect the connectors from the occupant classification ECU and the belt tension sensor. Check that the connectors (on the center airbag sensor side and seat belt tension sensor side) are not damaged. OK Connectors are not deformed or damaged. HINT: If the connectors are not connected securely, reconnect the connectors and proceed to the next inspection. NG --> REPAIR OR REPLACE FRONT SEAT WIRE RH OK: Go to next step
4. CHECK FRONT SEAT WIRE RH Connect the negative (-) terminal cable to the battery. Turn the engine switch on (IG). Measure the voltage according to the value(s) in the table below. Standard voltage Tester Connection Switch Condition Specified Condition a17-8 (GBT) - Body ground Engine switch on (IG) Below 1 V a17-16 (BT) - Body ground a17-17 (VBT) - Body ground Turn the engine switch off. Disconnect the negative (-) terminal cable from the battery, and wait for at least 90 seconds. Using 2 service wires, connect terminals 1 (GBT) and 3 (BT), and connect terminals 1 (GBT) and 2 (VBT) of connector C. NOTE: Do not forcibly insert the service wires into the terminals of the connector when connecting the wire. Measure the resistance according to the value(s) in the table below. Standard resistance Tester Connection Switch Condition Specified Condition a17-16 (BT) - a17-8 (GBT) Always Below 1 ohms a17-17 (VBT) - a17-8 (GBT) Disconnect the service wires from connector C. Measure the resistance according to the value(s) in the table below. Standard resistance Tester Connection Switch Condition Specified Condition a17-8 (GBT) - Body ground Always 1 Mohms or higher a17-16 (BT) - Body ground a17-17 (VBT) - Body ground a17-16 (BT) - a17-8 (GBT) a17-17 (VBT) - a17-8 (GBT) NG --> REPAIR OR REPLACE FRONT SEAT WIRE RH OK: Go to next step
5. CHECK FOR DTC Connect the connectors to the occupant classification ECU and the seat belt tension sensor. Connect the negative (-) terminal cable to the battery. Turn the engine switch on (IG). Clear the DTCs stored in the occupant classification ECU. Refer to «DTC CHECK / CLEAR»(ref-382823-S34104451062011012800000) . Clear the DTCs stored in the center airbag sensor. Refer to «DTC CHECK / CLEAR»(ref-382572-S09867252302011012800000) . Turn the engine switch off. Turn the engine switch on (IG). Check for the DTCs. Refer to «DTC CHECK / CLEAR»(ref-382823-S34104451062011012800000) . OK DTC B1773 and B1776 are not output. HINT: Codes other than B1773 and B1776 may be output at this time, but they are not related to this check. NG --> See step 6 OK --> See step 9
6. REPLACE FRONT SEAT OUTER BELT ASSEMBLY RH (SEAT BELT TENSION SENSOR) Turn the engine switch off. Disconnect the negative (-) terminal cable from the battery, and wait for at least 90 seconds. Replace the front seat outer belt. Refer to «DTC CHECK / CLEAR»(ref-382572-S09867252302011012800000) . HINT: Perform the inspection using parts from a normal vehicle if possible. Connect the negative (-) terminal cable to the battery. Turn the engine switch on (IG). Clear the DTCs stored in the occupant classification ECU. Refer to «DTC CHECK / CLEAR»(ref-382823-S34104451062011012800000) . Clear the DTCs stored in the center airbag sensor. Refer to «REMOVAL»(ref-382587-S42433553592011012800000) . Turn the engine switch off. Turn the engine switch on (IG). Check for the DTCs. Refer to «DTC CHECK / CLEAR»(ref-382823-S34104451062011012800000) . OK DTC B1773 and B1776 are not output. HINT: Codes other than B1773 and B1776 may be output at this time, but they are not related to this check. NG --> See step 7 OK --> END
7. REPLACE OCCUPANT CLASSIFICATION ECU Connect the Techstream to the DLC3. Turn the engine switch on (IG). Using the Techstream, save the ECU data from the ECU which has been installed on the vehicle. Refer to «REGISTRATION»(ref-382823-S22337285132011012800000) . Turn the engine switch off. Disconnect the negative (-) terminal cable from the battery, and wait for at least 90 seconds. Replace the occupant classification ECU. Refer to «DISASSEMBLY»(ref-382755-S28249673532011012800000) . Connect the negative (-) terminal cable to the battery. Turn the engine switch on (IG). Using the Techstream, load the previous ECU data stored into the new ECU. Refer to «REGISTRATION»(ref-382823-S22337285132011012800000) . Turn the engine switch off. Turn the engine switch on (IG). Clear the DTCs stored in the memory. Refer to «DTC CHECK / CLEAR»(ref-382823-S34104451062011012800000) . HINT: If DTC is not cleared at this time, past DTC will remain. NEXT: Go to next step
8. PERFORM SENSITIVITY CHECK Perform the sensitivity check. Refer to «INITIALIZATION»(ref-382823-S13703721832011012800000) . NEXT --> END
9. USE SIMULATION METHOD TO CHECK. Refer to «DIAGNOSIS SYSTEM»(ref-382823-S39243012562011012800000)

HINT

1. If troubleshooting (wire harness inspection) is difficult to perform, remove the passenger seat installation bolts to see the undersurface of the seat cushion.
2. In the above case, hold the seat so that it does not fall down. Holding the seat for a long period of time may cause a problem, such as seat rail deformation. Hold the seat only as necessary.
3. After performing the zero point calibration, check for DTCs to confirm that the calibration is completed normally. (If it fails, DTC B1797 will be output.)

Scheme 351

1. CHECK FOR DTC Turn the engine switch on (IG). Clear the DTCs stored in the occupant classification ECU. Refer to «DTC CHECK / CLEAR»(ref-382823-S34104451062011012800000) . Clear the DTCs stored in the center airbag sensor. Refer to «DTC CHECK / CLEAR»(ref-382572-S09867252302011012800000) . Turn the engine switch off. Turn the engine switch on (IG). Check for the DTCs. Refer to «DTC CHECK / CLEAR»(ref-382823-S34104451062011012800000) . OK DTC B1774 and B1775 are not output. HINT: Codes other than B1774 and B1775 may be output at this time, but they are not related to this check. NG --> See step 2 OK --> See step 10
2. CHECK CONNECTION OF CONNECTOR Turn the engine switch off. Disconnect the negative (-) terminal cable from the battery, and wait for at least 90 seconds. Check that the connectors are properly connected to the occupant classification ECU and the occupant detection sensor. OK Connectors are properly connected. NG --> CONNECT CONNECTORS PROPERLY OK: Go to next step
3. CHECK CONNECTOR Disconnect the connectors from the occupant classification ECU and the occupant detection sensor. Check that the connectors (on the center airbag sensor and occupant detection sensor side) are not damaged. OK Connectors are not deformed or damaged. NG --> REPAIR OR REPLACE FRONT SEAT WIRE RH OK: Go to next step
4. CHECK FRONT SEAT WIRE RH Connect the negative (-) terminal cable to the battery. Turn the engine switch on (IG). Measure the voltage according to the value(s) in the table below. Standard voltage Tester Connection Switch Condition Specified Condition a17-6 (PS) - Body ground Engine switch on (IG) Below 1 V a17-7 (VPS) - Body ground a17-15 (GPS) - Body ground Turn the engine switch off. Disconnect the negative (-) terminal cable from the battery, and wait for at least 90 seconds. Using 2 service wires, connect terminals 1 (GPS) and 3 (VPS), and connect terminals 2 (PS) and 3 (VPS) of connector C. NOTE: Do not forcibly insert the service wires into the terminals of the connector when connecting the wire. Measure the resistance according to the value(s) in the table below. Standard resistance Tester Connection Switch Condition Specified Condition a17-6 (PS) - a17-7 (VPS) Always Below 1 ohms a17-7 (VPS) - a17-15 (GPS) Disconnect the service wires from connector C. Measure the resistance according to the value(s) in the table below. Standard resistance Tester Connection Switch Condition Specified Condition a17-6 (PS) - Body ground Always 1 Mohms or higher a17-7 (VPS) - Body ground a17-15 (GPS) - Body ground a17-6 (PS) - a17-15 (GPS) a17-7 (VPS) - a17-15 (GPS) NG --> REPAIR OR REPLACE FRONT SEAT WIRE RH OK: Go to next step
5. CHECK FOR DTC Connect the connectors to the occupant classification ECU and the occupant detection sensor. Connect the negative (-) terminal cable to the battery. Turn the engine switch on (IG). Clear the DTCs stored in the occupant classification ECU. Refer to «DTC CHECK / CLEAR»(ref-382823-S34104451062011012800000) . Clear the DTCs stored in the center airbag sensor. Refer to «DTC CHECK / CLEAR»(ref-382572-S09867252302011012800000) . Turn the engine switch off. Turn the engine switch on (IG). Check for the DTCs. Refer to «DTC CHECK / CLEAR»(ref-382823-S34104451062011012800000) . OK DTCs B1774 and B1775 are not output. HINT: Codes other than B1774 and B1775 may be output at this time, but they are not related to this check. NG --> See step 6 OK --> See step 10
6. REPLACE FRONT SEAT CUSHION ASSEMBLY (OCCUPANT DETECTION SENSOR) Turn the engine switch off. Disconnect the negative (-) terminal cable from the battery, and wait for at least 90 seconds. Replace the front seat cushion (with occupant classification ECU and occupant detection sensor). Refer to «DISASSEMBLY»(ref-382755-S28249673532011012800000) . HINT: Perform the inspection using parts from a normal vehicle if possible. Connect the negative (-) terminal cable to the battery. Turn the engine switch on (IG). Clear the DTCs stored in the occupant classification ECU. Refer to «DTC CHECK / CLEAR»(ref-382823-S34104451062011012800000) . Clear the DTCs stored in the center airbag sensor. Refer to «DTC CHECK / CLEAR»(ref-382572-S09867252302011012800000) Turn the engine switch off. Turn the engine switch on (IG). Check for the DTCs. Refer to «DTC CHECK / CLEAR»(ref-382823-S34104451062011012800000) . OK DTC B1774 and B1775 are not output. HINT: Codes other than B1774 and B1775 may be output at this time, but they are not related to this check. NEXT: Go to next step
7. PERFORM ZERO POINT CALIBRATION Connect the Techstream to the DLC3. Turn the engine switch on (IG). Using the Techstream, perform the zero point calibration. Refer to «INITIALIZATION»(ref-382823-S13703721832011012800000) . Turn the engine switch off. Turn the engine switch on (IG). Clear the DTCs stored in the memory. Refer to «DTC CHECK / CLEAR»(ref-382823-S34104451062011012800000) . HINT: If DTC is not cleared at this time, past DTC will remain. NEXT: Go to next step
8. CHECK FOR DTC HINT: Check that the zero point calibration is completed normally. If any of the following conditions is met, DTC B1797 will be output (refer to INITIALIZATION. Refer to «INITIALIZATION»(ref-382823-S13703721832011012800000) ): Zero point calibration is performed when the conditions for the calibration are not satisfied. Zero point calibration has failed. Turn the engine switch on (IG). Clear the DTCs stored in the occupant classification ECU. Refer to «DTC CHECK / CLEAR»(ref-382823-S34104451062011012800000) . Clear the DTCs stored in the center airbag sensor. Refer to «DTC CHECK / CLEAR»(ref-382572-S09867252302011012800000) . Turn the engine switch off. Turn the engine switch on (IG). Check for the DTCs. Refer to «DTC CHECK / CLEAR»(ref-382823-S34104451062011012800000) . OK DTC B1797 is not output. NG --> See step 11 OK: Go to next step
9. PERFORM SENSITIVITY CHECK Perform the sensitivity check. Refer to «INITIALIZATION»(ref-382823-S13703721832011012800000) . NEXT --> END
10. USE SIMULATION METHOD TO CHECK. Refer to «DIAGNOSIS SYSTEM»(ref-382823-S39243012562011012800000)
11. Go to DTC B1797. Refer to «DTC B1797: Calibration Malfunction»(ref-382824-S36468079852011012800000)

HINT

1. If troubleshooting (wire harness inspection) is difficult to perform, remove the front passenger seat installation bolts to see the undersurface of the seat cushion.
2. In the above case, hold the seat so that it does not fall down. Holding the seat for a long period of time may cause a problem, such as seat rail deformation. Hold the seat only as necessary.

Scheme 352

Scheme 353

1. CHECK FOR DTC Turn the engine switch on (IG). Clear the DTCs stored in the occupant classification ECU. Refer to «DTC CHECK / CLEAR»(ref-382823-S34104451062011012800000) . Clear the DTCs stored in the center airbag sensor. Refer to «DTC CHECK / CLEAR»(ref-382572-S09867252302011012800000) . Turn the engine switch off. Turn the engine switch on (IG). Check for the DTCs. Refer to «DTC CHECK / CLEAR»(ref-382823-S34104451062011012800000) . OK DTC B1790 is not output. HINT: Codes other than DTC B1790 may be output at this time, but they are not related to this check. NG --> See step 2 OK --> See step 11
2. CHECK CONNECTION OF CONNECTOR Turn the engine switch off. Disconnect the negative (-) terminal cable from the battery. Check that the connectors are properly connected to the occupant classification ECU and the center airbag sensor. OK Connectors are properly connected. NG --> CONNECT CONNECTORS PROPERLY OK: Go to next step
3. CHECK CONNECTOR Disconnect the connectors from the center airbag sensor and the occupant classification ECU. Check that the connectors (on the center airbag sensor side and occupant classification ECU side) are not damaged. OK Connectors are not deformed or damaged. NG --> REPAIR OR REPLACE WIRE HARNESS OK: Go to next step
4. CHECK OCCUPANT CLASSIFICATION SYSTEM CIRCUIT Connect the negative (-) terminal cable to the battery. Turn the engine switch on (IG). Measure the voltage according to the value(s) in the table below. Standard voltage Tester Connection Switch Condition Specified Condition a17-11 (FSR+) - Body ground Engine switch on (IG) Below 1 V a17-12 (FSR-) - Body ground Turn the engine switch off. Disconnect the negative (-) terminal cable from the battery. Using a service wire, connect terminals 9 (FSR+) and 17 (FSR-) of connector B. NOTE: Do not forcibly insert the service wire into the terminals of the connector when connecting the wire. Measure the resistance according to the value(s) in the table below. Standard resistance Tester Connection Switch Condition Specified Condition a17-11 (FSR+) - a17-12 (FSR-) Always Below 1 ohms Disconnect the service wire from connector B. Measure the resistance according to the value(s) in the table below. Standard resistance Tester Connection Switch Condition Specified Condition a17-11 (FSR+) - a17-12 (FSR-) Always 1 Mohms or higher a17-11 (FSR+) - Body ground a17-12 (FSR-) - Body ground NG --> See step 10 OK: Go to next step
5. CHECK FOR DTC Connect the connectors to the occupant classification ECU and the center airbag sensor. Connect the Techstream to the DLC3. Connect the negative (-) terminal cable to the battery. Turn the engine switch on (IG). Clear the DTCs stored in the occupant classification ECU. Refer to «DTC CHECK / CLEAR»(ref-382823-S34104451062011012800000) . Clear the DTCs stored in the center airbag sensor. Refer to «DTC CHECK / CLEAR»(ref-382572-S09867252302011012800000) . Turn the engine switch off. Turn the engine switch on (IG). Using the Techstream, check for the DTCs of the occupant classification ECU. Refer to «DTC CHECK / CLEAR»(ref-382823-S34104451062011012800000) . OK DTC B1790 is not output. HINT: Codes other than DTC B1790 may be output at this time, but they are not related to this check. NG --> See step 6 OK --> See step 11
6. REPLACE OCCUPANT CLASSIFICATION ECU Connect the Techstream to the DLC3. Turn the engine switch on (IG). Using the Techstream, save the ECU data from the ECU which has been installed on the vehicle. Refer to «REGISTRATION»(ref-382823-S22337285132011012800000) . Turn the engine switch off. Disconnect the negative (-) terminal cable from the battery, and wait for at least 90 seconds. Replace the occupant classification ECU. Refer to «DISASSEMBLY»(ref-382755-S28249673532011012800000) . Connect the negative (-) terminal cable to the battery. Turn the engine switch on (IG). Using the Techstream, load the previous ECU data stored into the new ECU. Refer to «REGISTRATION»(ref-382823-S22337285132011012800000) . Turn the engine switch off. Turn the engine switch on (IG). Clear the DTCs stored in the memory. Refer to «DTC CHECK / CLEAR»(ref-382823-S34104451062011012800000) . HINT: If the DTCs are not cleared at this time, past DTCs will remain. NEXT: Go to next step
7. CHECK FOR DTC Turn the engine switch on (IG). Clear the DTCs stored in the occupant classification ECU. Refer to «DTC CHECK / CLEAR»(ref-382823-S34104451062011012800000) . Clear the DTCs stored in the center airbag sensor. Refer to «DTC CHECK / CLEAR»(ref-382572-S09867252302011012800000) . Turn the engine switch off. Turn the engine switch on (IG). Using the Techstream, check for the DTCs of the occupant classification ECU. Refer to «DTC CHECK / CLEAR»(ref-382823-S34104451062011012800000) . OK DTC B1790 is not output. HINT: Codes other than DTC B1790 may be output at this time, but they are not related to this check. OK --> See step 9 NG: Go to next step
8. REPLACE CENTER AIRBAG SENSOR ASSEMBLY Turn the engine switch off. Disconnect the negative (-) terminal cable from the battery, and wait for at least 90 seconds. Replace the center airbag sensor. Refer to «REMOVAL»(ref-382579-S07910187762011012800000) . NEXT: Go to next step
9. PERFORM SENSITIVITY CHECK Perform the sensitivity check. Refer to «INITIALIZATION»(ref-382823-S13703721832011012800000) . NEXT --> END
10. CHECK FLOOR WIRE Turn the engine switch off. Disconnect the negative (-) terminal cable from the battery, and wait for at least 90 seconds. Disconnect the front seat wire RH connector from the floor wire. Connect the negative (-) terminal cable to the battery, and wait for at least 2 seconds. Turn the engine switch on (IG). Measure the voltage according to the value(s) in the table below. Standard voltage Tester Connection Switch Condition Specified Condition Ua2-2 (FSR+) - Body ground Engine switch on (IG) Below 1 V Ua2-3 (FSR-) - Body ground Disconnect the front seat wire RH connector from the floor wire. Disconnect the negative (-) terminal cable from the battery. Using a service wire, connect terminals 9 (FSR+) and 17 (FSR-) of connector B. NOTE: Do not forcibly insert the service wire into the terminals of the connector when connecting the wire. Measure the resistance according to the value(s) in the table below. Standard resistance Tester Connection Switch Condition Specified Condition Ua2-2 (FSR+) - Ua2-3 (FSR-) Always Below 1 ohms Disconnect the service wire from connector B. Measure the resistance according to the value(s) in the table below. Standard resistance Tester Connection Switch Condition Specified Condition Ua2-2 (FSR+) - Ua2-3 (FSR-) Always 1 Mohms or higher Ua2-2 (FSR+) - Body ground Ua2-3 (FSR-) - Body ground NG --> REPAIR OR REPLACE FLOOR WIRE OK --> REPAIR OR REPLACE FRONT SEAT WIRE RH
11. USE SIMULATION METHOD TO CHECK. Refer to «DIAGNOSIS SYSTEM»(ref-382823-S39243012562011012800000)

HINT

1. If troubleshooting (wire harness inspection) is difficult to perform, remove the front passenger seat installation bolts to see the undersurface of the seat cushion.
2. In the above case, hold the seat so that it does not fall down. Holding the seat for a long period of time may cause a problem, such as seat rail deformation. Hold the seat only as necessary.

HINT

If this trouble occurs, the SRS warning light is off. If it is on, a DTC is output. Troubleshoot for the output DTC.