Home ReviewsRefund
Home/Lexus/HS/Lexus HS I (2009-2012)/Repair manual/Airbag/Occupant Classification System (Diagnostic Codes): Diagnosis
Contents Wiring diagrams Section: Airbag All sections

Occupant Classification System (Diagnostic Codes): Diagnosis Lexus HS I

Airbag 17 illustrations ~7364 words

INSPECTION PROCEDURE

HINT

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

Scheme 40

Scheme 40: PROCEDURE
Scheme 40: PROCEDURE

Scheme 41

Scheme 41
Scheme 41
  1. CHECK CONNECTORS Turn the power switch off. Disconnect the cable from the negative (-) battery terminal. Check that the connectors are properly connected to the occupant classification ECU and front seat inner belt assembly RH. OK The connectors are properly connected. HINT: If the connectors are not connected securely, reconnect the connectors and proceed to the next inspection. Disconnect the connectors from the occupant classification ECU and front seat inner belt assembly RH. Check that the terminals of the connectors are not damaged. OK The terminals are not deformed or damaged. NG --> REPLACE FRONT SEAT WIRE RH OK: Go to next step
  2. CHECK FRONT SEAT WIRE RH (SHORT TO B+) Connect the cable to the negative (-) battery terminal. Turn the power switch on (IG). Measure the voltage according to the value(s) in the table below. Standard Voltage Tester Connection Switch Condition Specified Condition S14-9 (BSW) - Body ground Power switch on (IG) Below 1 V S14-5 (BGND) - Body ground Power switch on (IG) Below 1 V TEXT IN ILLUSTRATION *1 Front Seat Inner Belt Assembly RH *2 Occupant Classification ECU *3 Front Seat Wire RH *4 Front view of wire harness connector (to Occupant Classification ECU) *5 Connector B NG --> REPLACE FRONT SEAT WIRE RH OK: Go to next step
  3. CHECK FRONT SEAT WIRE RH (OPEN) Turn the power switch off. Disconnect the cable from the negative (-) battery terminal. Using SST, connect terminals 2 (RBE+) and 1 (RBE-) of connector C. NOTE: Do not forcibly insert SST into the terminals of the connector when connecting. SST: 09843-18040 Measure the resistance according to the value(s) in the table below. Standard Resistance Tester Connection Condition Specified Condition S14-9 (BSW) - S14-5 (BGND) Always Below 1 ohms TEXT IN ILLUSTRATION *1 Front Seat Inner Belt Assembly RH *2 Occupant Classification ECU *3 Front Seat Wire RH *4 Front view of wire harness connector (to Occupant Classification ECU) *5 Front view of wire harness connector (to Front Seat Inner Belt Assembly RH) *6 Connector B *7 Connector C - - NG --> REPLACE FRONT SEAT WIRE RH OK: Go to next step
  4. CHECK FRONT SEAT WIRE RH (SHORT) Disconnect SST from connector C. Measure the resistance according to the value(s) in the table below. Standard Resistance Tester Connection Condition Specified Condition S14-9 (BSW) - S14-5 (BGND) Always 1 Mohms or higher TEXT IN ILLUSTRATION *1 Front Seat Inner Belt Assembly RH *2 Occupant Classification ECU *3 Front Seat Wire RH *4 Front view of wire harness connector (to Occupant Classification ECU) *5 Connector B NG --> REPLACE FRONT SEAT WIRE RH OK: Go to next step
  5. CHECK FRONT SEAT WIRE RH (SHORT TO GROUND) Measure the resistance according to the value(s) in the table below. Standard Resistance Tester Connection Condition Specified Condition S14-9 (BSW) - Body ground Always 1 Mohms or higher S14-5 (BGND) - Body ground Always 1 Mohms or higher TEXT IN ILLUSTRATION *1 Front Seat Inner Belt Assembly RH *2 Occupant Classification ECU *3 Front Seat Wire RH *4 Front view of wire harness connector (to Occupant Classification ECU) *5 Connector B NG --> REPLACE FRONT SEAT WIRE RH OK: Go to next step
  6. CHECK DTC Connect the connectors to the occupant classification ECU and front seat inner belt assembly RH. Connect the cable to the negative (-) battery terminal. Turn the power switch on (IG). Clear the DTCs stored in the occupant classification ECU. Refer to «DTC CHECK / CLEAR»(ref-398103-S42135564202011051600000) . Clear the DTCs stored in the center airbag sensor assembly. Refer to «DTC CHECK / CLEAR»(ref-398246-S01125415292011051600000) . Turn the power switch off. Turn the power switch on (IG). Check for DTCs of the occupant classification ECU. Refer to «DTC CHECK / CLEAR»(ref-398103-S42135564202011051600000) . OK DTC B1771 is not output. HINT: Codes other than DTC B1771 may be output at this time, but they are not related to this check. NG --> See step 7 OK --> See step 11
  7. REPLACE FRONT SEAT INNER BELT ASSEMBLY RH Turn the power switch off. Disconnect the cable from the negative (-) battery terminal. Replace the front seat inner belt assembly RH. Refer to «REMOVAL»(ref-398091-S30529843822011051600000) . HINT: Perform the inspection using parts from a normal vehicle if possible. Connect the cable to the negative (-) battery terminal. Turn the power switch on (IG). Clear the DTCs stored in the occupant classification ECU. Refer to «DTC CHECK / CLEAR»(ref-398103-S42135564202011051600000) . Clear the DTCs stored in the center airbag sensor assembly. Refer to «DTC CHECK / CLEAR»(ref-398246-S01125415292011051600000) . Turn the power switch off. Turn the power switch on (IG). Check for DTCs of the occupant classification ECU. Refer to «DTC CHECK / CLEAR»(ref-398103-S42135564202011051600000) . OK DTC B1771 is not output. HINT: Codes other than DTC B1771 may be output at this time, but they are not related to this check. NG --> See step 8 OK --> END
  8. REPLACE OCCUPANT CLASSIFICATION ECU Turn the power switch off. Disconnect the cable from the negative (-) battery terminal. Replace the occupant classification ECU. Refer to «REMOVAL»(ref-398090-S12538163052011051600000) . NEXT: Go to next step
  9. PERFORM ZERO POINT CALIBRATION Connect the cable to the negative (-) battery terminal. Connect the Techstream to the DLC3. Turn the power switch on (IG). Using the Techstream, perform Zero Point Calibration. Refer to «INITIALIZATION»(ref-398103-S03414413432011051600000) . OK "Zero Point Calibration is complete." is displayed. NEXT: Go to next step
  10. PERFORM SENSITIVITY CHECK Using the Techstream, perform Sensitivity Check. Refer to «INITIALIZATION»(ref-398103-S03414413432011051600000) . Standard 27 to 33 kg (59.5 to 72.8 lb) NEXT --> END
  11. USE SIMULATION METHOD TO CHECK. Refer to «HOW TO PROCEED WITH TROUBLESHOOTING»(ref-398089-S18270818032011051600000)

HINT

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

Scheme 42

Scheme 42: PROCEDURE
Scheme 42: PROCEDURE

Scheme 43

Scheme 43
Scheme 43
  1. CHECK CONNECTORS Turn the power switch off. Disconnect the cable from the negative (-) battery terminal. Check that the connectors are properly connected to the occupant classification ECU and front occupant classification sensor LH. OK The connectors are properly connected. HINT: If the connectors are not connected securely, reconnect the connectors and proceed to the next inspection. Disconnect the connectors from the occupant classification ECU and front occupant classification sensor LH. Check that the terminals of the connectors are not damaged. OK The terminals are not deformed or damaged. NG --> REPLACE FRONT SEAT WIRE RH OK: Go to next step
  2. CHECK FRONT SEAT WIRE RH (SHORT TO B+) Connect the cable to the negative (-) battery terminal. Turn the power switch on (IG). Measure the voltage according to the value(s) in the table below. Standard Voltage Tester Connection Switch Condition Specified Condition S20-1 (SGD1) - Body ground Power switch on (IG) Below 1 V S20-7 (SIG1) - Body ground Power switch on (IG) Below 1 V S20-11 (SVC1) - Body ground Power switch on (IG) Below 1 V TEXT IN ILLUSTRATION *1 Front Occupant Classification Sensor LH *2 Occupant Classification ECU *3 Front Seat Wire RH *4 Front view of wire harness connector (to Occupant Classification ECU) *5 Connector B NG --> REPLACE FRONT SEAT WIRE RH OK: Go to next step
  3. CHECK FRONT SEAT WIRE RH (OPEN) Turn the power switch off. Disconnect the cable from the negative (-) battery terminal. Using SST, connect terminals 1 (SVC1) and 3 (SGD1), and connect terminals 2 (SIG1) and 3 (SGD1) of connector C. NOTE: Do not forcibly insert SST into the terminals of the connector when connecting. SST: 09843-18040 Measure the resistance according to the value(s) in the table below. Standard Resistance Tester Connection Condition Specified Condition S20-7 (SIG1) - S20-1 (SGD1) Always Below 1 ohms S20-11 (SVC1) - S20-1 (SGD1) Always Below 1 ohms TEXT IN ILLUSTRATION *1 Front Occupant Classification Sensor LH *2 Occupant Classification ECU *3 Front Seat Wire RH *4 Front view of wire harness connector (to Occupant Classification ECU) *5 Front view of wire harness connector (to Front Occupant Classification Sensor LH) *6 Connector B *7 Connector C - - NG --> REPLACE FRONT SEAT WIRE RH OK: Go to next step
  4. CHECK FRONT SEAT WIRE RH (SHORT) Disconnect SST from connector C. Measure the resistance according to the value(s) in the table below. Standard Resistance Tester Connection Condition Specified Condition S20-7 (SIG1) - S20-1 (SGD1) Always 1 Mohms or higher S20-11 (SVC1) - S20-1 (SGD1) Always 1 Mohms or higher S20-7 (SIG1) - S20-11 (SVC1) Always 1 Mohms or higher TEXT IN ILLUSTRATION *1 Front Occupant Classification Sensor LH *2 Occupant Classification ECU *3 Front Seat Wire RH *4 Front view of wire harness connector (to Occupant Classification ECU) *5 Connector B NG --> REPLACE FRONT SEAT WIRE RH OK: Go to next step
  5. CHECK FRONT SEAT WIRE RH (SHORT TO GROUND) Measure the resistance according to the value(s) in the table below. Standard Resistance Tester Connection Condition Specified Condition S20-1 (SGD1) - Body ground Always 1 Mohms or higher S20-7 (SIG1) - Body ground Always 1 Mohms or higher S20-11 (SVC1) - Body ground Always 1 Mohms or higher TEXT IN ILLUSTRATION *1 Front Occupant Classification Sensor LH *2 Occupant Classification ECU *3 Front Seat Wire RH *4 Front view of wire harness connector (to Occupant Classification ECU) *5 Connector B NG --> REPLACE FRONT SEAT WIRE RH OK: Go to next step
  6. CHECK DTC Connect the connectors to the occupant classification ECU and front occupant classification sensor LH. Connect the cable to the negative (-) battery terminal. Turn the power switch on (IG). Clear the DTCs stored in the occupant classification ECU. Refer to «DTC CHECK / CLEAR»(ref-398103-S42135564202011051600000) . Clear the DTCs stored in the center airbag sensor assembly. Refer to «DTC CHECK / CLEAR»(ref-398246-S01125415292011051600000) . Turn the power switch off. Turn the power switch on (IG). Check for DTCs of the occupant classification ECU. Refer to «DTC CHECK / CLEAR»(ref-398103-S42135564202011051600000) . OK DTC B1780 is not output. HINT: Codes other than DTC B1780 may be output at this time, but they are not related to this check. NG --> See step 7 OK --> See step 10
  7. REPLACE FRONT SEAT ASSEMBLY RH Turn the power switch off. Disconnect the cable from the negative (-) battery terminal. Replace the front seat assembly RH. Refer to «REMOVAL»(ref-398249-S33005380292011051600000) . NEXT: Go to next step
  8. PERFORM ZERO POINT CALIBRATION Connect the cable to the negative (-) battery terminal. Connect the Techstream to the DLC3. Turn the power switch on (IG). Using the Techstream, perform Zero Point Calibration. Refer to «INITIALIZATION»(ref-398103-S03414413432011051600000) . OK "Zero Point Calibration is complete." is displayed. NEXT: Go to next step
  9. PERFORM SENSITIVITY CHECK Using the Techstream, perform Sensitivity Check. Refer to «INITIALIZATION»(ref-398103-S03414413432011051600000) . Standard 27 to 33 kg (59.5 to 72.8 lb) NEXT --> END
  10. USE SIMULATION METHOD TO CHECK. Refer to «HOW TO PROCEED WITH TROUBLESHOOTING»(ref-398089-S18270818032011051600000)

HINT

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

Scheme 44

Scheme 44: PROCEDURE
Scheme 44: PROCEDURE

Scheme 45

Scheme 45
Scheme 45
  1. CHECK CONNECTORS Turn the power switch off. Disconnect the cable from the negative (-) battery terminal. Check that the connectors are properly connected to the occupant classification ECU and front occupant classification sensor RH. OK The connectors are properly connected. HINT: If the connectors are not connected securely, reconnect the connectors and proceed to the next inspection. Disconnect the connectors from the occupant classification ECU and front occupant classification sensor RH. Check that the terminals of the connectors are not damaged. OK The terminals are not deformed or damaged. NG --> REPLACE FRONT SEAT WIRE RH OK: Go to next step
  2. CHECK FRONT SEAT WIRE RH (SHORT TO B+) Connect the cable to the negative (-) battery terminal. Turn the power switch on (IG). Measure the voltage according to the value(s) in the table below. Standard Voltage Tester Connection Switch Condition Specified Condition S20-2 (SGD2) - Body ground Power switch on (IG) Below 1 V S20-8 (SIG2) - Body ground Power switch on (IG) Below 1 V S20-12 (SVC2) - Body ground Power switch on (IG) Below 1 V TEXT IN ILLUSTRATION *1 Front Occupant Classification Sensor RH *2 Occupant Classification ECU *3 Front Seat Wire RH *4 Front view of wire harness connector (to Occupant Classification ECU) *5 Connector B NG --> REPLACE FRONT SEAT WIRE RH OK: Go to next step
  3. CHECK FRONT SEAT WIRE RH (OPEN) Turn the power switch off. Disconnect the cable from the negative (-) battery terminal. Using SST, connect terminals 1 (SVC2) and 3 (SGD2), and connect terminals 2 (SIG2) and 3 (SGD2) of connector C. NOTE: Do not forcibly insert SST into the terminals of the connector when connecting. SST: 09843-18040 Measure the resistance according to the value(s) in the table below. Standard Resistance Tester Connection Condition Specified Condition S20-8 (SIG2) - S20-2 (SGD2) Always Below 1 ohms S20-12 (SVC2) - S20-2 (SGD2) Always Below 1 ohms TEXT IN ILLUSTRATION *1 Front Occupant Classification Sensor RH *2 Occupant Classification ECU *3 Front Seat Wire RH *4 Front view of wire harness connector (to Occupant Classification ECU) *5 Front view of wire harness connector (to Front Occupant Classification Sensor RH) *6 Connector B *7 Connector C - - NG --> REPLACE FRONT SEAT WIRE RH OK: Go to next step
  4. CHECK FRONT SEAT WIRE RH (SHORT) Disconnect SST from connector C. Measure the resistance according to the value(s) in the table below. Standard Resistance Tester Connection Condition Specified Condition S20-8 (SIG2) - S20-2 (SGD2) Always 1 Mohms or higher S20-12 (SVC2) - S20-2 (SGD2) Always 1 Mohms or higher S20-8 (SIG2) - S20-12 (SVC2) Always 1 Mohms or higher TEXT IN ILLUSTRATION *1 Front Occupant Classification Sensor RH *2 Occupant Classification ECU *3 Front Seat Wire RH *4 Front view of wire harness connector (to Occupant Classification ECU) *5 Connector B NG --> REPLACE FRONT SEAT WIRE RH OK: Go to next step
  5. CHECK FRONT SEAT WIRE RH (SHORT TO GROUND) Measure the resistance according to the value(s) in the table below. Standard Resistance Tester Connection Condition Specified Condition S20-2 (SGD2) - Body ground Always 1 Mohms or higher S20-8 (SIG2) - Body ground Always 1 Mohms or higher S20-12 (SVC2) - Body ground Always 1 Mohms or higher TEXT IN ILLUSTRATION *1 Front Occupant Classification Sensor RH *2 Occupant Classification ECU *3 Front Seat Wire RH *4 Front view of wire harness connector (to Occupant Classification ECU) *5 Connector B NG --> REPLACE FRONT SEAT WIRE RH OK: Go to next step
  6. CHECK DTC Connect the connectors to the occupant classification ECU and front occupant classification sensor RH. Connect the cable to the negative (-) battery terminal. Turn the power switch on (IG). Clear the DTCs stored in the occupant classification ECU. Refer to «DTC CHECK / CLEAR»(ref-398103-S42135564202011051600000) . Clear the DTCs stored in the center airbag sensor assembly. Refer to «DTC CHECK / CLEAR»(ref-398246-S01125415292011051600000) . Turn the power switch off. Turn the power switch on (IG). Check for DTCs of the occupant classification ECU. Refer to «DTC CHECK / CLEAR»(ref-398103-S42135564202011051600000) . OK DTC B1781 is not output. HINT: Codes other than DTC B1781 may be output at this time, but they are not related to this check. NG --> See step 7 OK --> See step 10
  7. REPLACE FRONT SEAT ASSEMBLY RH Turn the power switch off. Disconnect the cable from the negative (-) battery terminal. Replace the front seat assembly RH. Refer to «REMOVAL»(ref-398249-S33005380292011051600000) . NEXT: Go to next step
  8. PERFORM ZERO POINT CALIBRATION Connect the cable to the negative (-) battery terminal. Connect the Techstream to the DLC3. Turn the power switch on (IG). Using the Techstream, perform Zero Point Calibration. Refer to «INITIALIZATION»(ref-398103-S03414413432011051600000) . OK "Zero Point Calibration is complete." is displayed. NEXT: Go to next step
  9. PERFORM SENSITIVITY CHECK Using the Techstream, perform Sensitivity Check. Refer to «INITIALIZATION»(ref-398103-S03414413432011051600000) . Standard 27 to 33 kg (59.5 to 72.8 lb) NEXT --> END
  10. USE SIMULATION METHOD TO CHECK. Refer to «HOW TO PROCEED WITH TROUBLESHOOTING»(ref-398089-S18270818032011051600000)

HINT

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

Scheme 46

Scheme 46: PROCEDURE
Scheme 46: PROCEDURE

Scheme 47

Scheme 47
Scheme 47
  1. CHECK CONNECTORS Turn the power switch off. Disconnect the cable from the negative (-) battery terminal. Check that the connectors are properly connected to the occupant classification ECU and rear occupant classification sensor LH. OK The connectors are properly connected. HINT: If the connectors are not connected securely, reconnect the connectors and proceed to the next inspection. Disconnect the connectors from the occupant classification ECU and rear occupant classification sensor LH. Check that the terminals of the connectors are not damaged. OK The terminals are not deformed or damaged. NG --> REPLACE FRONT SEAT WIRE RH OK: Go to next step
  2. CHECK FRONT SEAT WIRE RH (SHORT TO B+) Connect the cable to the negative (-) battery terminal. Turn the power switch on (IG). Measure the voltage according to the value(s) in the table below. Standard Voltage Tester Connection Switch Condition Specified Condition S20-3 (SGD3) - Body ground Power switch on (IG) Below 1 V S20-5 (SVC3) - Body ground Power switch on (IG) Below 1 V S20-9 (SIG3) - Body ground Power switch on (IG) Below 1 V TEXT IN ILLUSTRATION *1 Rear Occupant Classification Sensor LH *2 Occupant Classification ECU *3 Front Seat Wire RH *4 Front view of wire harness connector (to Occupant Classification ECU) *5 Connector B NG --> REPLACE FRONT SEAT WIRE RH OK: Go to next step
  3. CHECK FRONT SEAT WIRE RH (OPEN) Turn the power switch off. Disconnect the cable from the negative (-) battery terminal. Using SST, connect terminals 1 (SVC3) and 3 (SGD3), and connect terminals 2 (SIG3) and 3 (SGD3) of connector C. NOTE: Do not forcibly insert SST into the terminals of the connector when connecting. SST: 09843-18040 Measure the resistance according to the value(s) in the table below. Standard Resistance Tester Connection Condition Specified Condition S20-5 (SVC3) - S20-3 (SGD3) Always Below 1 ohms S20-9 (SIG3) - S20-3 (SGD3) Always Below 1 ohms TEXT IN ILLUSTRATION *1 Rear Occupant Classification Sensor LH *2 Occupant Classification ECU *3 Front Seat Wire RH *4 Front view of wire harness connector (to Occupant Classification ECU) *5 Front view of wire harness connector (to Rear Occupant Classification Sensor LH) *6 Connector B *7 Connector C - - NG --> REPLACE FRONT SEAT WIRE RH OK: Go to next step
  4. CHECK FRONT SEAT WIRE RH (SHORT) Disconnect SST from connector C. Measure the resistance according to the value(s) in the table below. Standard Resistance Tester Connection Condition Specified Condition S20-5 (SVC3) - S20-3 (SGD3) Always 1 Mohms or higher S20-9 (SIG3) - S20-3 (SGD3) Always 1 Mohms or higher S20-5 (SVC3) - S20-9 (SIG3) Always 1 Mohms or higher TEXT IN ILLUSTRATION *1 Rear Occupant Classification Sensor LH *2 Occupant Classification ECU *3 Front Seat Wire RH *4 Front view of wire harness connector (to Occupant Classification ECU) *5 Connector B NG --> REPLACE FRONT SEAT WIRE RH OK: Go to next step
  5. CHECK FRONT SEAT WIRE RH (SHORT TO GROUND) Measure the resistance according to the value(s) in the table below. Standard Resistance Tester Connection Condition Specified Condition S20-3 (SGD3) - Body ground Always 1 Mohms or higher S20-5 (SVC3) - Body ground Always 1 Mohms or higher S20-9 (SIG3) - Body ground Always 1 Mohms or higher TEXT IN ILLUSTRATION *1 Rear Occupant Classification Sensor LH *2 Occupant Classification ECU *3 Front Seat Wire RH *4 Front view of wire harness connector (to Occupant Classification ECU) *5 Connector B NG --> REPLACE FRONT SEAT WIRE RH OK: Go to next step
  6. CHECK DTC Connect the connectors to the occupant classification ECU and rear occupant classification sensor LH. Connect the cable to the negative (-) battery terminal. Turn the power switch on (IG). Clear the DTCs stored in the occupant classification ECU. Refer to «DTC CHECK / CLEAR»(ref-398103-S42135564202011051600000) . Clear the DTCs stored in the center airbag sensor assembly. Refer to «DTC CHECK / CLEAR»(ref-398246-S01125415292011051600000) . Turn the power switch off. Turn the power switch on (IG). Check for DTCs of the occupant classification ECU. Refer to «DTC CHECK / CLEAR»(ref-398103-S42135564202011051600000) . OK DTC B1782 is not output. HINT: Codes other than DTC B1782 may be output at this time, but they are not related to this check. NG --> See step 7 OK --> See step 10
  7. REPLACE FRONT SEAT ASSEMBLY RH Turn the power switch off. Disconnect the cable from the negative (-) battery terminal. Replace the front seat assembly RH. Refer to «REMOVAL»(ref-398249-S33005380292011051600000) . NEXT: Go to next step
  8. PERFORM ZERO POINT CALIBRATION Connect the cable to the negative (-) battery terminal. Connect the Techstream to the DLC3. Turn the power switch on (IG). Using the Techstream, perform Zero Point Calibration. Refer to «INITIALIZATION»(ref-398103-S03414413432011051600000) . OK "Zero Point Calibration is complete." is displayed. NEXT: Go to next step
  9. PERFORM SENSITIVITY CHECK Using the Techstream, perform Sensitivity Check. Refer to «INITIALIZATION»(ref-398103-S03414413432011051600000) . Standard 27 to 33 kg (59.5 to 72.8 lb) NEXT --> END
  10. USE SIMULATION METHOD TO CHECK. Refer to «HOW TO PROCEED WITH TROUBLESHOOTING»(ref-398089-S18270818032011051600000)

HINT

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

Scheme 48

Scheme 48: PROCEDURE
Scheme 48: PROCEDURE

Scheme 49

Scheme 49
Scheme 49
  1. CHECK CONNECTORS Turn the power switch off. Disconnect the cable from the negative (-) battery terminal. Check that the connectors are properly connected to the occupant classification ECU and rear occupant classification sensor RH. OK The connectors are properly connected. HINT: If the connectors are not connected securely, reconnect the connectors and proceed to the next inspection. Disconnect the connectors from the occupant classification ECU and rear occupant classification sensor RH. Check that the terminals of the connectors are not damaged. OK The terminals are not deformed or damaged. NG --> REPLACE FRONT SEAT WIRE RH OK: Go to next step
  2. CHECK FRONT SEAT WIRE RH (SHORT TO B+) Connect the cable to the negative (-) battery terminal. Turn the power switch on (IG). Measure the voltage according to the value(s) in the table below. Standard Voltage Tester Connection Switch Condition Specified Condition S20-4 (SGD4) - Body ground Power switch on (IG) Below 1 V S20-6 (SVC4) - Body ground Power switch on (IG) Below 1 V S20-10 (SIG4) - Body ground Power switch on (IG) Below 1 V TEXT IN ILLUSTRATION *1 Rear Occupant Classification Sensor RH *2 Occupant Classification ECU *3 Front Seat Wire RH *4 Front view of wire harness connector (to Occupant Classification ECU) *5 Connector B NG --> REPLACE FRONT SEAT WIRE RH OK: Go to next step
  3. CHECK FRONT SEAT WIRE RH (OPEN) Turn the power switch off. Disconnect the cable from the negative (-) battery terminal. Using SST, connect terminals 1 (SVC4) and 3 (SGD4), and connect terminals 2 (SIG4) and 3 (SGD4) of connector C. NOTE: Do not forcibly insert SST into the terminals of the connector when connecting. SST: 09843-18040 Measure the resistance according to the value(s) in the table below. Standard Resistance Tester Connection Condition Specified Condition S20-6 (SVC4) - S20-4 (SGD4) Always Below 1 ohms S20-10 (SIG4) - S20-4 (SGD4) Always Below 1 ohms TEXT IN ILLUSTRATION *1 Rear Occupant Classification Sensor RH *2 Occupant Classification ECU *3 Front Seat Wire RH *4 Front view of wire harness connector (to Occupant Classification ECU) *5 Front view of wire harness connector (to Rear Occupant Classification Sensor RH) *6 Connector B *7 Connector C - - NG --> REPLACE FRONT SEAT WIRE RH OK: Go to next step
  4. CHECK FRONT SEAT WIRE RH (SHORT) Disconnect SST from connector C. Measure the resistance according to the value(s) in the table below. Standard Resistance Tester Connection Condition Specified Condition S20-6 (SVC4) - S20-4 (SGD4) Always 1 Mohms or higher S20-10 (SIG4) - S20-4 (SGD4) Always 1 Mohms or higher S20-6 (SVC4) - S20-10 (SIG4) Always 1 Mohms or higher TEXT IN ILLUSTRATION *1 Rear Occupant Classification Sensor RH *2 Occupant Classification ECU *3 Front Seat Wire RH *4 Front view of wire harness connector (to Occupant Classification ECU) *5 Connector B NG --> REPLACE FRONT SEAT WIRE RH OK: Go to next step
  5. CHECK FRONT SEAT WIRE RH (SHORT TO GROUND) Measure the resistance according to the value(s) in the table below. Standard Resistance Tester Connection Condition Specified Condition S20-4 (SGD4) - Body ground Always 1 Mohms or higher S20-6 (SVC4) - Body ground Always 1 Mohms or higher S20-10 (SIG4) - Body ground Always 1 Mohms or higher TEXT IN ILLUSTRATION *1 Rear Occupant Classification Sensor RH *2 Occupant Classification ECU *3 Front Seat Wire RH *4 Front view of wire harness connector (to Occupant Classification ECU) *5 Connector B NG --> REPLACE FRONT SEAT WIRE RH OK: Go to next step
  6. CHECK DTC Connect the connectors to the occupant classification ECU and rear occupant classification sensor RH. Connect the cable to the negative (-) battery terminal. Turn the power switch on (IG). Clear the DTCs stored in the occupant classification ECU. Refer to «DTC CHECK / CLEAR»(ref-398103-S42135564202011051600000) . Clear the DTCs stored in the center airbag sensor assembly. Refer to «DTC CHECK / CLEAR»(ref-398246-S01125415292011051600000) . Turn the power switch off. Turn the power switch on (IG). Check for DTCs of the occupant classification ECU. Refer to «DTC CHECK / CLEAR»(ref-398103-S42135564202011051600000) . OK DTC B1783 is not output. HINT: Codes other than DTC B1783 may be output at this time, but they are not related to this check. NG --> See step 7 OK --> See step 10
  7. REPLACE FRONT SEAT ASSEMBLY RH Turn the power switch off. Disconnect the cable from the negative (-) battery terminal. Replace the front seat assembly RH. Refer to «REMOVAL»(ref-398249-S33005380292011051600000) . NEXT: Go to next step
  8. PERFORM ZERO POINT CALIBRATION Connect the cable to the negative (-) battery terminal. Connect the Techstream to the DLC3. Turn the power switch on (IG). Using the Techstream, perform Zero Point Calibration. Refer to «INITIALIZATION»(ref-398103-S03414413432011051600000) . OK "Zero Point Calibration is complete." is displayed. NEXT: Go to next step
  9. PERFORM SENSITIVITY CHECK Using the Techstream, perform Sensitivity Check. Refer to «INITIALIZATION»(ref-398103-S03414413432011051600000) . Standard 27 to 33 kg (59.5 to 72.8 lb) NEXT --> END
  10. USE SIMULATION METHOD TO CHECK. Refer to «HOW TO PROCEED WITH TROUBLESHOOTING»(ref-398089-S18270818032011051600000)

HINT

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

Scheme 50

Scheme 50: PROCEDURE
Scheme 50: PROCEDURE

Scheme 51

Scheme 51
Scheme 51

Scheme 52

Scheme 52
Scheme 52

Scheme 53

Scheme 53
Scheme 53
  1. CHECK CONNECTORS Turn the power switch off. Disconnect the cable from the negative (-) battery terminal. WARNING: Wait at least 90 seconds after disconnecting the cable from the negative (-) battery terminal to disable the SRS system. Check that the connectors are properly connected to the center airbag sensor assembly and occupant classification ECU. Also check that the connectors that link the front seat wire RH and No. 2 floor wire are properly connected. OK The connectors are properly connected. HINT: If the connectors are not connected securely, reconnect the connectors and proceed to the next inspection. Disconnect the connectors from the center airbag sensor assembly and occupant classification ECU. Also disconnect the connectors that link the front seat wire RH and No. 2 floor wire. Check that the terminals of the connectors are not damaged. OK The terminals are not deformed or damaged. NG --> REPLACE WIRE HARNESS OK: Go to next step
  2. CHECK OCCUPANT CLASSIFICATION SYSTEM CIRCUIT (SHORT TO B+) Connect the cable to the negative (-) battery terminal. Turn the power switch on (IG). Measure the voltage according to the value(s) in the table below. Standard Voltage Tester Connection Switch Condition Specified Condition S14-8 (FSR+) - Body ground Power switch on (IG) Below 1 V S14-4 (FSR-) - Body ground Power switch on (IG) Below 1 V TEXT IN ILLUSTRATION *1 Occupant Classification ECU *2 Center Airbag Sensor Assembly *3 Front view of wire harness connector (to Occupant Classification ECU) *4 Connector E NG --> See step 11 OK: Go to next step
  3. CHECK OCCUPANT CLASSIFICATION SYSTEM CIRCUIT (OPEN) Turn the power switch off. Disconnect the cable from the negative (-) battery terminal. WARNING: Wait at least 90 seconds after disconnecting the cable from the negative (-) battery terminal to disable the SRS system. Using SST, connect terminals 16 (FSR+) and 24 (FSR-) of connector B. NOTE: Do not forcibly insert SST into the terminals of the connector when connecting. SST: 09843-18040 Measure the resistance according to the value(s) in the table below. Standard Resistance Tester Connection Condition Specified Condition S14-8 (FSR+) - S14-4 (FSR-) Always Below 1 ohms TEXT IN ILLUSTRATION *1 Occupant Classification ECU *2 Center Airbag Sensor Assembly *3 Front view of wire harness connector (to Center Airbag Sensor Assembly) *4 Front view of wire harness connector (to Occupant Classification ECU) *5 Connector B *6 Connector E NG --> See step 12 OK: Go to next step
  4. CHECK OCCUPANT CLASSIFICATION SYSTEM CIRCUIT (SHORT) Disconnect SST from connector B. Measure the resistance according to the value(s) in the table below. Standard Resistance Tester Connection Condition Specified Condition S14-8 (FSR+) - S14-4 (FSR-) Always 1 Mohms or higher TEXT IN ILLUSTRATION *1 Occupant Classification ECU *2 Center Airbag Sensor Assembly *3 Front view of wire harness connector (to Occupant Classification ECU) *4 Connector E NG --> See step 13 OK: Go to next step
  5. CHECK OCCUPANT CLASSIFICATION SYSTEM CIRCUIT (SHORT TO GROUND) Measure the resistance according to the value(s) in the table below. Standard Resistance Tester Connection Condition Specified Condition S14-8 (FSR+) - Body ground Always 1 Mohms or higher S14-4 (FSR-) - Body ground Always 1 Mohms or higher TEXT IN ILLUSTRATION *1 Occupant Classification ECU *2 Center Airbag Sensor Assembly *3 Front view of wire harness connector (to Occupant Classification ECU) *4 Connector E NG --> See step 14 OK: Go to next step
  6. CHECK DTC Connect the connectors to the occupant classification ECU and center airbag sensor assembly. Connect the Techstream to the DLC3. Connect the cable to the negative (-) battery terminal. Turn the power switch on (IG). Clear the DTCs stored in the occupant classification ECU. Refer to «DTC CHECK / CLEAR»(ref-398103-S42135564202011051600000) . Clear the DTCs stored in the center airbag sensor assembly. Refer to «DTC CHECK / CLEAR»(ref-398246-S01125415292011051600000) . Turn the power switch off. Turn the power switch on (IG). Check for DTCs of the occupant classification ECU. Refer to «DTC CHECK / CLEAR»(ref-398103-S42135564202011051600000) . 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 7 OK --> See step 15
  7. REPLACE OCCUPANT CLASSIFICATION ECU Turn the power switch off. Disconnect the cable from the negative (-) battery terminals. WARNING: Wait at least 90 seconds after disconnecting the cable from the negative (-) battery terminal to disable the SRS system. Replace the occupant classification ECU. Refer to «REMOVAL»(ref-398090-S12538163052011051600000) . HINT: Perform the inspection using parts from a normal vehicle if possible. NEXT: Go to next step
  8. RECHECK DTC Turn the power switch on (IG). Clear the DTCs stored in the occupant classification ECU. Refer to «DTC CHECK / CLEAR»(ref-398103-S42135564202011051600000) . Clear the DTCs stored in the center airbag sensor assembly. Refer to «DTC CHECK / CLEAR»(ref-398246-S01125415292011051600000) . Turn the power switch off. Turn the power switch on (IG). Check for DTCs of the occupant classification ECU. Refer to «DTC CHECK / CLEAR»(ref-398103-S42135564202011051600000) . 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 16 OK: Go to next step
  9. PERFORM ZERO POINT CALIBRATION Connect the cable to the negative (-) battery terminal. Connect the Techstream to the DLC3. Turn the power switch on (IG). Using the Techstream, perform Zero Point Calibration. Refer to «INITIALIZATION»(ref-398103-S03414413432011051600000) . OK "Zero Point Calibration is complete." is displayed. NEXT: Go to next step
  10. PERFORM SENSITIVITY CHECK Using the Techstream, perform Sensitivity Check. Refer to «INITIALIZATION»(ref-398103-S03414413432011051600000) . Standard 27 to 33 kg (59.5 to 72.8 lb) NEXT --> END
  11. CHECK NO. 2 FLOOR WIRE (SHORT TO B+) Turn the power switch off. Disconnect the cable from the negative (-) battery terminal. WARNING: Wait at least 90 seconds after disconnecting the cable from the negative (-) battery terminal to disable the SRS system. Disconnect the front seat wire RH connector from the No. 2 floor wire. Connect the cable to the negative (-) battery terminal. Turn the power switch on (IG). Measure the voltage according to the value(s) in the table below. Standard Voltage Tester Connection Switch Condition Specified Condition MS2-6 (FSR+) - Body ground Power switch on (IG) Below 1 V MS2-7 (FSR-) - Body ground Power switch on (IG) Below 1 V TEXT IN ILLUSTRATION *1 Occupant Classification ECU *2 Center Airbag Sensor Assembly *3 Front Seat Wire RH *4 No. 2 Floor Wire *5 Front view of wire harness connector (to Front Seat Wire RH) *6 Connector C NG --> REPLACE NO. 2 FLOOR WIRE OK --> REPLACE FRONT SEAT WIRE RH
  12. CHECK NO. 2 FLOOR WIRE (OPEN) Disconnect the front seat wire RH connector from the No. 2 floor wire. HINT: SST has already been inserted into connector B. Measure the resistance according to the value(s) in the table below. Standard Resistance Tester Connection Condition Specified Condition MS2-6 (FSR+) - MS2-7 (FSR-) Always Below 1 ohms TEXT IN ILLUSTRATION *1 Occupant Classification ECU *2 Center Airbag Sensor Assembly *3 Front Seat Wire RH *4 No. 2 Floor Wire *5 Front view of wire harness connector (to Center Airbag Sensor Assembly) *6 Front view of wire harness connector (to Front Seat Wire RH) *7 Connector B *8 Connector C NG --> REPLACE NO. 2 FLOOR WIRE OK --> REPLACE FRONT SEAT WIRE RH
  13. CHECK NO. 2 FLOOR WIRE (SHORT) Disconnect the front seat wire RH connector from the No. 2 floor wire. Measure the resistance according to the value(s) in the table below. Standard Resistance Tester Connection Condition Specified Condition MS2-6 (FSR+) - MS2-7 (FSR-) Always 1 Mohms or higher TEXT IN ILLUSTRATION *1 Occupant Classification ECU *2 Center Airbag Sensor Assembly *3 Front Seat Wire RH *4 No. 2 Floor Wire *5 Front view of wire harness connector (to Front Seat Wire RH) *6 Connector C NG --> REPLACE NO. 2 FLOOR WIRE OK --> REPLACE FRONT SEAT WIRE RH
  14. CHECK NO. 2 FLOOR WIRE (SHORT TO GROUND) Disconnect the front seat wire RH connector from the No. 2 floor wire. Measure the resistance according to the value(s) in the table below. Standard Resistance Tester Connection Condition Specified Condition MS2-6 (FSR+) - Body ground Always 1 Mohms or higher MS2-7 (FSR-) - Body ground Always 1 Mohms or higher TEXT IN ILLUSTRATION *1 Occupant Classification ECU *2 Center Airbag Sensor Assembly *3 Front Seat Wire RH *4 No. 2 Floor Wire *5 Front view of wire harness connector (to Front Seat Wire RH) *6 Connector C NG --> REPLACE NO. 2 FLOOR WIRE OK --> REPLACE FRONT SEAT WIRE RH
  15. USE SIMULATION METHOD TO CHECK. Refer to «HOW TO PROCEED WITH TROUBLESHOOTING»(ref-398089-S18270818032011051600000)
  16. REPLACE CENTER AIRBAG SENSOR ASSEMBLY. Refer to «REMOVAL»(ref-398090-S02975140692011051600000)

HINT

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

Scheme 54

Scheme 54: PROCEDURE
Scheme 54: PROCEDURE

Scheme 55

Scheme 55
Scheme 55
  1. CHECK CONNECTORS Turn the power switch off. Disconnect the cable from the negative (-) battery terminal. Check that the connectors are properly connected to the 4 occupant classification sensors and occupant classification ECU. OK The connectors are properly connected. HINT: If the connectors are not connected securely, reconnect the connectors and proceed to the next inspection. Disconnect the connectors from the 4 occupant classification sensors and occupant classification ECU. Check that the terminals of the connectors are not damaged. OK The terminals are not deformed or damaged. NG --> REPLACE FRONT SEAT WIRE RH OK: Go to next step
  2. CHECK FRONT SEAT WIRE RH (SHORT TO B+) Connect the cable to the negative (-) battery terminal. Turn the power switch on (IG). Measure the voltage according to the value(s) in the table below. Standard Voltage Tester Connection Switch Condition Specified Condition S20-5 (SVC3) - Body ground Power switch on (IG) Below 1 V S20-6 (SVC4) - Body ground Power switch on (IG) Below 1 V S20-11 (SVC1) - Body ground Power switch on (IG) Below 1 V S20-12 (SVC2) - Body ground Power switch on (IG) Below 1 V TEXT IN ILLUSTRATION *1 Front view of wire harness connector (to Occupant Classification ECU) NG --> REPLACE FRONT SEAT WIRE RH OK: Go to next step
  3. CHECK FRONT SEAT WIRE RH (SHORT TO GROUND) Turn the power switch off. Disconnect the cable from the negative (-) battery terminal. Measure the resistance according to the value(s) in the table below. Standard Resistance Tester Connection Condition Specified Condition S20-5 (SVC3) - Body ground Always 1 Mohms or higher S20-6 (SVC4) - Body ground Always 1 Mohms or higher S20-11 (SVC1) - Body ground Always 1 Mohms or higher S20-12 (SVC2) - Body ground Always 1 Mohms or higher TEXT IN ILLUSTRATION *1 Front view of wire harness connector (to Occupant Classification ECU) NG --> REPLACE FRONT SEAT WIRE RH OK: Go to next step
  4. CHECK FRONT SEAT WIRE RH (OPEN) Measure the resistance according to the value(s) in the table below. Standard Resistance Tester Connection Condition Specified Condition S20-5 (SVC3) - S12-1 (SVC3) Always Below 1 ohms S20-6 (SVC4) - S13-1 (SVC4) Always Below 1 ohms S20-11 (SVC1) - S10-1 (SVC1) Always Below 1 ohms S20-12 (SVC2) - S11-1 (SVC2) Always Below 1 ohms TEXT IN ILLUSTRATION *1 Front view of wire harness connector (to Occupant Classification Sensor) *2 Front Occupant Classification Sensor LH *3 Front Occupant Classification Sensor RH *4 Rear Occupant Classification Sensor LH *5 Rear Occupant Classification Sensor RH *6 Front view of wire harness connector (to Occupant Classification ECU) NG --> REPLACE FRONT SEAT WIRE RH OK: Go to next step
  5. CHECK FRONT SEAT WIRE RH (SHORT) Measure the resistance according to the value(s) in the table below. Standard Resistance Tester Connection Condition Specified Condition S20-5 (SVC3) - S20-6 (SVC4) Always 1 Mohms or higher S20-5 (SVC3) - S20-11 (SVC1) Always 1 Mohms or higher S20-5 (SVC3) - S20-12 (SVC2) Always 1 Mohms or higher S20-6 (SVC4) - S20-11 (SVC1) Always 1 Mohms or higher S20-6 (SVC4) - S20-12 (SVC2) Always 1 Mohms or higher S20-11 (SVC1) - S20-12 (SVC2) Always 1 Mohms or higher TEXT IN ILLUSTRATION *1 Front view of wire harness connector (to Occupant Classification ECU) NG --> REPLACE FRONT SEAT WIRE RH OK: Go to next step
  6. CHECK DTC Connect the connectors to the occupant classification ECU and 4 occupant classification sensors. Connect the cable to the negative (-) battery terminal. Turn the power switch on (IG). Clear the DTCs stored in the occupant classification ECU. Refer to «DTC CHECK / CLEAR»(ref-398103-S42135564202011051600000) . Clear the DTCs stored in the center airbag sensor assembly. Refer to «DTC CHECK / CLEAR»(ref-398246-S01125415292011051600000) . Turn the power switch off. Turn the power switch on (IG). Check for DTCs of the occupant classification ECU. Refer to «DTC CHECK / CLEAR»(ref-398103-S42135564202011051600000) . OK DTC B1793 is not output. HINT: Codes other than DTC B1793 may be output at this time, but they are not related to this check. NG --> See step 7 OK --> See step 10
  7. REPLACE FRONT SEAT ASSEMBLY RH Turn the power switch off. Disconnect the cable from the negative (-) battery terminal. Replace the front seat assembly RH. Refer to «REMOVAL»(ref-398249-S33005380292011051600000) . NEXT: Go to next step
  8. PERFORM ZERO POINT CALIBRATION Connect the cable to the negative (-) battery terminal. Connect the Techstream to the DLC3. Turn the power switch on (IG). Using the Techstream, perform Zero Point Calibration. Refer to «INITIALIZATION»(ref-398103-S03414413432011051600000) . OK "Zero Point Calibration is complete." is displayed. NEXT: Go to next step
  9. PERFORM SENSITIVITY CHECK Using the Techstream, perform Sensitivity Check. Refer to «INITIALIZATION»(ref-398103-S03414413432011051600000) . Standard 27 to 33 kg (59.5 to 72.8 lb) NEXT --> END
  10. USE SIMULATION METHOD TO CHECK. Refer to «HOW TO PROCEED WITH TROUBLESHOOTING»(ref-398089-S18270818032011051600000)

Note. Inspect the fuses for circuits related to this system before performing the following inspection procedure.

Scheme 56

Scheme 56: PROCEDURE
Scheme 56: PROCEDURE
  1. CHECK AUXILIARY BATTERY VOLTAGE Measure the voltage of the auxiliary battery. Standard Voltage 11 to 14 V NG --> See step 7 OK: Go to next step
  2. CHECK WIRE HARNESS (SOURCE VOLTAGE) Turn the power switch off. Disconnect the cable from the negative (-) battery terminal. Disconnect the connector from the occupant classification ECU. Connect the cable to the negative (-) battery terminal. Turn the power switch on (IG). Measure the voltage according to the value(s) in the table below. Standard Voltage Tester Connection Switch Condition Specified Condition S14-1 (+B) - Body ground Always 11 to 14 V Turn the power switch off. Measure the resistance according to the value(s) in the table below. Standard Resistance Tester Connection Condition Specified Condition S14-3 (GND) - Body ground Always Below 1 ohms TEXT IN ILLUSTRATION *1 Front view of wire harness connector (to Occupant Classification ECU) NG --> REPLACE WIRE HARNESS OK: Go to next step
  3. CHECK DTC Turn the power switch off. Disconnect the cable from the negative (-) battery terminal. Connect the connector to the occupant classification ECU. Connect the Techstream to the DLC3. Connect the cable to the negative (-) battery terminal. Turn the power switch on (IG). Clear the DTCs stored in the occupant classification ECU. Refer to «DTC CHECK / CLEAR»(ref-398103-S42135564202011051600000) . Clear the DTCs stored in the center airbag sensor assembly. Refer to «DTC CHECK / CLEAR»(ref-398246-S01125415292011051600000) . Turn the power switch off. Turn the power switch on (IG), and wait for at least 10 seconds. Check for DTCs of the occupant classification ECU. Refer to «DTC CHECK / CLEAR»(ref-398103-S42135564202011051600000) . OK DTC B1794 is not output. HINT: Codes other than DTC B1794 may be output at this time, but they are not related to this check. NG --> See step 4 OK --> See step 8
  4. REPLACE OCCUPANT CLASSIFICATION ECU Turn the power switch off. Disconnect the cable from the negative (-) battery terminal. Replace the occupant classification ECU. Refer to «REMOVAL»(ref-398090-S12538163052011051600000) . NEXT: Go to next step
  5. PERFORM ZERO POINT CALIBRATION Connect the cable to the negative (-) battery terminal. Connect the Techstream to the DLC3. Turn the power switch on (IG). Using the Techstream, perform Zero Point Calibration. Refer to «INITIALIZATION»(ref-398103-S03414413432011051600000) . OK "Zero Point Calibration is complete." is displayed. NEXT: Go to next step
  6. PERFORM SENSITIVITY CHECK Using the Techstream, perform Sensitivity Check. Refer to «INITIALIZATION»(ref-398103-S03414413432011051600000) . Standard 27 to 33 kg (59.5 to 72.8 lb) NEXT --> END
  7. INSPECT AUXILIARY BATTERY. Refer to «ON-VEHICLE INSPECTION»(ref-398219-S35747524102011051600000)
  8. USE SIMULATION METHOD TO CHECK. Refer to «HOW TO PROCEED WITH TROUBLESHOOTING»(ref-398089-S18270818032011051600000)

More articles — Occupant Classification System (Diagnostic Codes)