Trouble In Passenger Airbag On/Off Indicator

SUPPLEMENTAL RESTRAINT SYSTEMS: 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 the front passenger airbag, front passenger side knee airbag, front seat side airbag RH and front seat belt pretensioner RH 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 indicate 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 procedure below as a DTC is not output. If the SRS warning light is on, a DTC is output. Troubleshoot for the stored 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 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, history DTCs will remain.

NEXT -- Continue to next step.

2. CHECK 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 assembly DTC Check / Clear.

(d) Turn the engine switch off.

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

(f) Check for DTCs of the occupant classification ECU 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 Initialization.

NG -- READ VALUE USING DATA LIST (PASSENGER SIDE BUCKLE SWITCH)

OK -- END

4. READ VALUE USING DATA LIST (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 the display when the passenger side buckle switch is operated.





OK:

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

NG -- REPLACE FRONT SEAT INNER BELT ASSEMBLY RH Removal
OK -- Continue to next step.

5. READ VALUE USING DATA LIST (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.





OK:

When there is no tension on the belt, 39 to 64 is displayed on the Techstream.

NG -- REPLACE FRONT SEAT OUTER BELT ASSEMBLY RH Removal
OK -- Continue to next step.

6. CHECK CONNECTORS

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

(b) Check that the terminals of connectors are not damaged.

OK:

The terminals are not deformed or damaged.

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

7. REPLACE FRONT SEAT CUSHION ASSEMBLY

(a) Turn the engine switch off.

(b) Disconnect the cable from the negative (-) battery terminal.

(c) Replace the front seat cushion assembly (with occupant classification ECU and occupant classification sensor) Removal.

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

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

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

(g) Clear the DTCs stored in the center airbag sensor assembly DTC Check / Clear.

(h) Turn the engine switch off.

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

(j) Check for DTCs Reading and Clearing Diagnostic Trouble Codes.

OK:

DTC is not output.

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, history DTCs will remain.

NEXT -- Continue to next step.

9. PERFORM SENSITIVITY CHECK

(a) Perform the sensitivity check Initialization.

NEXT -- END