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Trouble In Passenger Airbag ON/OFF Indicator








SUPPLEMENTAL RESTRAINT SYSTEM: OCCUPANT CLASSIFICATION SYSTEM: Trouble in Passenger Airbag ON/OFF Indicator

Trouble in Passenger Airbag ON/OFF Indicator

DESCRIPTION

The occupant classification system detects the front passenger seat condition. It then informs a passenger of the front passenger airbag and front seat side airbag condition (activated/not activated) by the passenger airbag ON/OFF indicator.
HINT: Approximately 6 seconds after the ignition switch is turned to ON, the passenger airbag ON/OFF indicator will be ON/OFF depending on the conditions listed below.





INSPECTION PROCEDURE
HINT: When the indicator is malfunctioning, if the SRS warning light is off, follow the procedures below as a DTC is not output. If the SRS warning light is on, a DTC is output. Troubleshoot for the output DTC.

PROCEDURE

1. PERFORM ZERO POINT CALIBRATION
(a) Connect the Techstream to the DLC3.
(b) Turn the ignition switch to ON.
(c) Using the Techstream, perform zero point calibration Initialization.
NEXT -- Continue to next step.
2. CHECK FOR DTC
(a) Clear the DTCs stored in the occupant classification ECU Reading and Clearing Diagnostic Trouble Codes.
(b) Clear the DTCs stored in the center airbag sensor DTC Check / Clear.
(c) Turn the ignition switch to OFF.
(d) Turn the ignition switch to ON.
(e) Check for the DTCs Reading and Clearing Diagnostic Trouble Codes.
OK:
DTC B1797 is not output.
HINT: Codes other than DTC B1797 may be output at this time, but they are not related to this check.

NG -- GO TO DTC B1797
OK -- Continue to next step.
3. CHECK PASSENGER AIRBAG ON / OFF INDICATOR (PERFORM SENSITIVITY CHECK)
(a) Perform the sensitivity check Initialization.
(b) Check the passenger airbag ON/OFF indicator Diagnosis System.
NG -- READ VALUE USING TECHSTREAM (PASSENGER SIDE BUCKLE SWITCH)
OK -- END
4. READ VALUE USING TECHSTREAM (PASSENGER SIDE BUCKLE SWITCH)
(a) Turn the ignition switch to ON.
(b) Using the Techstream, read the "DATA LIST" or "Data List" Scan Tool Testing and Procedures.
(1) Read the display when the passenger side buckle switch is operated.

Occupant Detection:





OK:
Tester display changes correctly in accordance with the operation of the buckle switch.
NG -- CHECK CONNECTOR
OK -- Continue to next step.
5. READ VALUE USING TECHSTREAM (SEAT BELT TENSION SENSOR)
(a) Fasten the passenger side seat belt.
(b) Turn the ignition switch to ON.
(c) Using the Techstream, read the value of the "DATA LIST" or "Data List" Scan Tool Testing and Procedures.

Occupant Detection:





OK:
When there is no tension on belt, 39 to 229 is displayed on tester.
NG -- CHECK CONNECTOR
OK -- Continue to next step.
6. CHECK CONNECTOR
(a) Disconnect the connectors from the occupant classification ECU and the occupant detection sensor.
(b) 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 -- REPLACE FRONT SEAT WIRE RH
OK -- Continue to next step.
7. PERFORM REGISTRATION BEFORE ECU EXCHANGE
(a) Connect the Techstream to the DLC3.
(b) Turn the ignition switch to ON.
(c) Using the Techstream, save the ECU data from the ECU which was installed on the vehicle Registration.
NEXT -- Continue to next step.
8. REPLACE FRONT SEAT CUSHION
(a) Turn the ignition switch to OFF.
(b) Disconnect the negative (-) terminal cable from the battery, and wait for at least 90 seconds.
(c) Replace the front seat cushion (with occupant classification ECU and occupant detection sensor) Removal.
(d) Connect the negative (-) terminal cable to the battery.
NEXT -- Continue to next step.
9. PERFORM REGISTRATION AFTER ECU EXCHANGE
(a) Turn the ignition switch to ON.
(b) Using the Techstream, load the previous ECU data stored in the tester into the new ECU Registration.
NEXT -- Continue to next step.
10. PERFORM ZERO POINT CALIBRATION
(a) Connect the Techstream to the DLC3.
(b) Turn the ignition switch to ON.
(c) Using the Techstream, perform zero point calibration Initialization.
NEXT -- Continue to next step.
11. CHECK FOR DTC
HINT: Check that the zero point calibration is completed normally. If one of the following conditions is met, DTC B1797 will be output (refer to INITIALIZATION Initialization):
- Zero point calibration is performed when the conditions for the calibration are not satisfied.
- Zero point calibration has failed.
(a) Clear the DTCs stored in the occupant classification ECU Reading and Clearing Diagnostic Trouble Codes.
(b) Clear the DTCs stored in the center airbag sensor DTC Check / Clear.
(c) Turn the ignition switch to OFF.
(d) Turn the ignition switch to ON.
(e) Check for the DTCs Reading and Clearing Diagnostic Trouble Codes.
OK:
DTC B1797 is not output.
NG -- GO TO DTC B1797
OK -- Continue to next step.
12. PERFORM SENSITIVITY CHECK
(a) Perform the sensitivity check Initialization.
NEXT -- END
13. CHECK CONNECTOR
(a) Disconnect the connectors from the occupant classification ECU and front seat inner belt RH.
(b) 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 or damaged.
NG -- REPLACE FRONT SEAT WIRE RH
OK -- Continue to next step.
14. REPLACE FRONT SEAT INNER BELT ASSEMBLY RH
(a) Turn the ignition switch to OFF.
(b) Disconnect the negative (-) terminal cable from the battery, and wait for at least 90 seconds.
(c) Replace the front seat inner belt RH Removal.
(d) Connect the negative (-) terminal cable to the battery.
NEXT -- Continue to next step.
15. PERFORM ZERO POINT CALIBRATION
(a) Connect the Techstream to the DLC3.
(b) Turn the ignition switch to ON.
(c) Using the Techstream, perform zero point calibration Initialization.
NEXT -- Continue to next step.
16. PERFORM SENSITIVITY CHECK
(a) Perform the sensitivity check Initialization.
NEXT -- END
17. CHECK CONNECTOR
(a) Disconnect the connectors from the occupant classification ECU and the belt tension sensor.
(b) 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 -- REPLACE FRONT SEAT WIRE RH
OK -- Continue to next step.
18. REPLACE FRONT SEAT OUTER BELT ASSEMBLY RH (SEAT BELT TENSION SENSOR)
(a) Turn the ignition switch to OFF.
(b) Disconnect the negative (-) terminal cable from the battery, and wait for at least 90 seconds.
(c) Replace the front seat outer belt RH Removal.
(d) Connect the negative (-) terminal cable to the battery.
NEXT -- Continue to next step.
19. PERFORM ZERO POINT CALIBRATION
(a) Connect the Techstream to the DLC3.
(b) Turn the ignition switch to ON.
(c) Using the Techstream, perform zero point calibration Initialization.
NEXT -- Continue to next step.
20. PERFORM SENSITIVITY CHECK
(a) Perform the sensitivity check Initialization.
NEXT -- END
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