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 engine switch is turned on (IG), the passenger airbag ON/OFF indicator will be ON/OFF depending on the conditions listed below.





INSPECTION PROCEDURE

NOTICE:
* w/ Navigation System (for HDD):
After the engine switch is turned off, the display and navigation module display (HDD navigation system) records various types of memory and settings. As a result, after turning the engine switch off, be sure to wait for the time specified in the following table before disconnecting the cable from the negative (-) battery terminal.

Waiting Time before Disconnecting Cable from Negative (-) Battery Terminal:





* When disconnecting the cable, some systems need to be initialized after the cable is reconnected Repair Instruction - Initialization.

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 engine switch on (IG).

(c) Using the Techstream, perform zero point calibration Diagnosis System.

(d) Turn the engine switch off.

(e) Turn the engine switch on (IG).

(f) Check for the DTCs of the occupant classification ECU Reading and Clearing Diagnostic Trouble Codes.

NEXT -- Continue to next step.

2. CHECK FOR DTC

(a) Turn the engine switch on (IG).

(b) Clear the DTCs stored in the occupant classification ECU Reading and Clearing Diagnostic Trouble Codes.

(c) Clear the DTCs stored in the center airbag sensor Reading and Clearing Diagnostic Trouble Codes.

(d) Turn the engine switch off.

(e) Turn the engine switch on (IG).

(f) 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 B1797
OK -- Continue to next step.

3. CHECK PASSENGER AIRBAG ON / OFF INDICATOR (PERFORM SENSITIVITY CHECK)

(a) Perform the sensitivity check Diagnosis System.

(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 engine switch on (IG).

(b) Using the Techstream, read the "Data List" Scan Tool Testing and Procedures.

(1) Read the display when the passenger side buckle switch is operated.

Occupant Detection:





OK:

Techstream 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 engine switch on (IG).

(c) Using the Techstream, read the value of the "Data List" Scan Tool Testing and Procedures.

Occupant Detection:





OK:

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

NG -- CHECK CONNECTOR
OK -- Continue to next step.

6. CHECK CONNECTOR

(a) Disconnect the connectors from the occupant classification ECU and the detection sensor.

(b) Check that the connectors (on the center airbag sensor 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. REPLACE FRONT SEAT SET

(a) Turn the engine switch off.

(b) Disconnect the negative (-) terminal cable from the battery, and wait for at least 90 seconds.

(c) Replace the front seat set (with occupant classification ECU and occupant detection sensor) Disassembly.

(d) Connect the negative (-) terminal cable to the battery.

NEXT -- Continue to next step.

8. PERFORM ZERO POINT CALIBRATION

(a) Connect the Techstream to the DLC3.

(b) Turn the engine switch on (IG).

(c) Using the Techstream, perform zero point calibration Initialization.

(d) Turn the engine switch off.

(e) Turn the engine switch on (IG).

(f) Clear the DTCs stored in the occupant classification ECU Reading and Clearing Diagnostic Trouble Codes.

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

NEXT -- Continue to next step.

9. PERFORM SENSITIVITY CHECK

(a) Perform the sensitivity check Initialization.

OK:

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

NG -- REPLACE FRONT SEAT SET (OCCUPANT CLASSIFICATION ECU) Disassembly

OK -- END

10. CHECK CONNECTOR

(a) Disconnect the connectors from the occupant classification ECU and front seat inner belt RH.

(b) Check that the connectors (on the center airbag sensor 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.

11. REPLACE FRONT SEAT INNER BELT ASSEMBLY RH

(a) Turn the engine switch 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.

12. PERFORM ZERO POINT CALIBRATION

(a) Connect the Techstream to the DLC3.

(b) Turn the engine switch on (IG).

(c) Using the Techstream, perform zero point calibration Initialization.

NEXT -- Continue to next step.

13. PERFORM SENSITIVITY CHECK

(a) Perform the sensitivity check Diagnosis System.

NEXT -- END

14. CHECK CONNECTOR

(a) Disconnect the connectors from the occupant classification ECU and the belt tension sensor.

(b) 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.

NG -- REPLACE FRONT SEAT WIRE RH
OK -- Continue to next step.

15. REPLACE FRONT SEAT OUTER BELT ASSEMBLY RH (SEAT BELT TENSION SENSOR)

(a) Turn the engine switch 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.

16. PERFORM ZERO POINT CALIBRATION

(a) Connect the Techstream to the DLC3.

(b) Turn the engine switch on (IG).

(c) Using the Techstream, perform zero point calibration Diagnosis System.

NEXT -- Continue to next step.

17. PERFORM SENSITIVITY CHECK

(a) Perform the sensitivity check Diagnosis System.

NEXT -- END