Trouble in Passenger Airbag ON/OFF Indicator: Procedure

1. Connect the Techstream to the DLC3.
2. Turn the engine switch on (IG).
3. Using the Techstream, perform the zero point calibration. Refer to DIAGNOSIS SYSTEM .
4. Turn the engine switch off.
5. Turn the engine switch on (IG).
6. Check for the DTCs of the occupant classification ECU. Refer to DTC CHECK / CLEAR .

NEXT: Go to next step 

1. Turn the engine switch on (IG).
2. Clear the DTCs stored in the occupant classification ECU. Refer to DTC CHECK / CLEAR .
3. Clear the DTCs stored in the center airbag sensor assembly. Refer to DTC CHECK / CLEAR .
4. Turn the engine switch off.
5. Turn the engine switch on (IG).
6. Check for the DTCs. Refer to DTC CHECK / CLEAR .

   OK

   DTC B1797 is not output.

   HINT: 

   Codes other than B1797 may be output at this time, but they are not related to this check.

NG → See step   18 

OK: Go to next step 

1. Perform the sensitivity check. Refer to DIAGNOSIS SYSTEM .
2. Check the passenger airbag ON/OFF indicator. Refer to DIAGNOSIS SYSTEM .

NG → See step   4 

OK → END 

1. Turn the engine switch on (IG).
2. Using the Techstream, read the DATA LIST. Refer to DATA LIST / ACTIVE TEST .
   1. Read the display when the passenger side buckle switch is operated.
      OCCUPANT CLASSIFICATION ECU:
      
      

      Tester Display	Measurement Item / Range	Normal Condition	Specified Condition for Zero Point Calibration	Diagnostic Note
      Passenger Buckle SW	Buckle switch (Passenger side) / Set, Unset or NG	Set: The seat belt is fastened Unset: The seat belt is not fastened NG: Data is not determined	Unset	-

      OK

      The Techstream display changes correctly in accordance with the operation of the buckle switch.

NG → See step   10 

OK: Go to next step 

1. Fasten the passenger side seat belt.
2. Turn the engine switch on (IG).
3. Using the Techstream, read the value of the DATA LIST. Refer to DATA LIST / ACTIVE TEST .
   OCCUPANT CLASSIFICATION ECU:
   
   

   Tester Display	Measurement Item / Range	Normal Condition	Specified Condition for Zero Point Calibration	Diagnostic Note
   Filtered Belt Tension Output	Filtered belt tension output / Min.: 0, Max.: 255	39 to 229	39 to 64 (no load)	-

   OK

   When there is no tension on belt, 39 to 229 is displayed on the Techstream.

NG → See step   14 

OK: Go to next step 

1. Disconnect the connectors from the occupant classification ECU and the detection sensor.
2. Check that the connectors (on the occupant classification ECU side 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 

1. Turn the engine switch off.
2. Disconnect the negative (-) terminal cable from the battery, and wait for at least 90 seconds.
3. Front seat (for power seat)
   1. Replace the front seat cushion (with occupant classification ECU and occupant detection sensor). Refer to REMOVAL .
4. Front seat (for manual seat)
   1. Replace the front seat cushion (with occupant classification ECU and occupant detection sensor). Refer to REMOVAL .
5. Connect the negative (-) terminal cable to the battery.

NEXT: Go to next step 

1. Connect the Techstream to the DLC3.
2. Turn the engine switch on (IG).
3. Using the Techstream, perform the zero point calibration. Refer to INITIALIZATION .
4. Turn the engine switch off.
5. Turn the engine switch on (IG).
6. Clear the DTCs stored in the occupant classification ECU. Refer to DTC CHECK / CLEAR .

   HINT: 

   If the DTCs are not cleared at this time, past DTCs will remain.

NEXT: Go to next step 

1. Perform the sensitivity check. Refer to INITIALIZATION .

   OK

   Passenger airbag ON/OFF indicator changes correctly in accordance with the operation.

NG → REPLACE OCCUPANT CLASSIFICATION ECU 

OK → END 

1. Disconnect the connectors from the occupant classification ECU and front seat inner belt RH.
2. Check that the connectors (on the occupant classification ECU side and front seat inner belt RH side) are not damaged.

   OK

   Connectors are not deformed and damaged.

NG → REPAIR OR REPLACE FRONT SEAT WIRE RH 

OK: Go to next step 

1. Turn the engine switch off.
2. Disconnect the negative (-) terminal cable from the battery, and wait for at least 90 seconds.
3. Replace the front seat inner belt RH. Refer to REMOVAL .
4. Connect the negative (-) terminal cable to the battery.

NEXT: Go to next step 

1. Connect the Techstream to the DLC3.
2. Turn the engine switch on (IG).
3. Using the Techstream, perform the zero point calibration. Refer to INITIALIZATION .

NEXT: Go to next step 

1. Perform the sensitivity check. Refer to DIAGNOSIS SYSTEM .

NEXT → END 

1. Disconnect the connectors from the occupant classification ECU and the seat belt tension sensor.
2. Check that the connectors (on the occupant classification ECU side and seat belt tension 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 

1. Turn the engine switch off.
2. Disconnect the negative (-) terminal cable from the battery, and wait for at least 90 seconds.
3. Replace the front seat outer belt RH. Refer to REMOVAL .
4. Connect the negative (-) terminal cable to the battery.

NEXT: Go to next step 

1. Connect the Techstream to the DLC3.
2. Turn the engine switch on (IG).
3. Using the Techstream, perform the zero point calibration. Refer to DIAGNOSIS SYSTEM .

NEXT: Go to next step 

1. Perform the sensitivity check. Refer to DIAGNOSIS SYSTEM .

NEXT → END