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 and then indicates whether the front passenger airbag is activated or not through the passenger airbag ON/OFF indicator illumination.
The passenger airbag ON/OFF indicator illumination changes depending on the front passenger seat condition as shown in the table below.






WIRING DIAGRAM





INSPECTION PROCEDURE

PROCEDURE

1. CHECK SRS WARNING LIGHT
(a) Turn the ignition switch to the on position, and check the SRS warning light condition.
OK:
The SRS warning light does not come on.
NG -- CHECK DTC
OK -- Continue to next step.
2. CHECK PASSENGER AIRBAG ON/OFF INDICATOR CONDITION
(a) Turn the ignition switch to the on position.
(b) Check if the passenger airbag ON/OFF indicator correctly indicates the front passenger seat condition.
OK:






OK -- END
NG -- Continue to next step.
3. PERFORM ZERO POINT CALIBRATION
(a) Turn the ignition switch to the lock position.
(b) Connect the Techstream to the DLC3.
(c) Turn the ignition switch to the on position.
(d) Using the Techstream, perform the zero point calibration Programming and Relearning.
OK:
COMPLETE is displayed.
NG -- RETIGHTEN FRONT SEAT ASSEMBLY RH BOLT
OK -- Continue to next step.
4. PERFORM SENSITIVITY CHECK
(a) Using the Techstream, perform the sensitivity check Programming and Relearning.
(1) Confirm that nothing is placed on the passenger seat.
(2) Confirm that the beginning sensor reading is within the standard range.
Standard range:
-3.2 to 3.2 kg (-7 to 7 lb)
(3) Place a 30 kg (66.14 lb) weight (e.g. a lead mass) onto the front passenger seat.
(4) Confirm that the sensitivity is within the standard range.
Standard range:
27 to 33 kg (59.52 to 72.75 lb)
HINT: When performing the sensitivity check, use a solid metal weight (the check result may not be accurate if a liquid weight is used).

NG -- RETIGHTEN FRONT SEAT ASSEMBLY RH BOLT
OK -- END
5. RETIGHTEN FRONT SEAT ASSEMBLY RH BOLT
(a) Turn the ignition switch to the lock position.
(b) Loosen the 4 installation bolts of the front seat assembly RH.
(c) Tighten the 4 installation bolts of the front seat assembly RH to the specified torque.
Torque: 37 Nm (375 kgf-cm, 27 ft-lbf)
NG -- CHECK CONNECTORS
OK -- Continue to next step.
6. PERFORM ZERO POINT CALIBRATION
(a) Connect the Techstream to the DLC3.
(b) Turn the ignition switch to the on position.
(c) Using the Techstream, perform the zero point calibration Programming and Relearning.
OK:
COMPLETE is displayed.
NG -- CHECK CONNECTORS
OK -- Continue to next step.
7. PERFORM SENSITIVITY CHECK
(a) Using the Techstream, perform the sensitivity check Programming and Relearning.
(1) Confirm that nothing is placed on the passenger seat.
(2) Confirm that the beginning sensor reading is within the standard range.
Standard range:
-3.2 to 3.2 kg (-7 to 7 lb)
(3) Place a 30 kg (66.14 lb) weight (e.g. a lead mass) onto the front passenger seat.
(4) Confirm that the sensitivity is within the standard range.
Standard range:
27 to 33 kg (59.52 to 72.75 lb)
HINT: When performing the sensitivity check, use a solid metal weight (the check result may not be accurate if a liquid weight is used).

NG -- CHECK CONNECTORS
OK -- Continue to next step.
8. CHECK CONNECTORS
(a) Turn the ignition switch to the lock position.
(b) Disconnect the negative (-) terminal cable from the battery, and wait for at least 90 seconds.
(c) Check that the connectors are properly connected to the occupant classification ECU and the 4 occupant classification sensors.
OK:
The connectors are connected.
(d) Disconnect the connectors from the occupant classification ECU and the 4 occupant classification sensors.
(e) Check that the connectors are not damaged or deformed.
OK:
The connectors are normal.
NG -- REPAIR OR REPLACE WIRE HARNESS AND CONNECTOR
OK -- Continue to next step.
9. CHECK DTC
(a) Connect the connectors to the occupant classification ECU and the 4 occupant classification sensors.
(b) Connect the negative (-) terminal cable to the battery.
(c) Turn the ignition switch to the on position, and wait for at least 60 seconds.
(d) Turn the ignition switch to the lock position.
(e) Clear the DTCs stored in the memory Reading and Clearing Diagnostic Trouble Codes.
(f) Turn the ignition switch to the on position, and wait for at least 60 seconds.
(g) Check the DTCs Reading and Clearing Diagnostic Trouble Codes.
OK:
DTC is not output.
NG -- REPLACE CENTER AIRBAG SENSOR ASSEMBLY
OK -- Continue to next step.
10. REPLACE OCCUPANT CLASSIFICATION ECU
(a) Turn the ignition switch to the lock position.
(b) Disconnect the negative (-) terminal cable from the battery, and wait for at least 90 seconds.
(c) Replace the occupant classification ECU Removal.
HINT: Perform the inspection using parts from a normal vehicle if possible.

NEXT -- Continue to next step.
11. PERFORM ZERO POINT CALIBRATION
(a) Connect the negative (-) terminal cable to the battery.
(b) Connect the Techstream to the DLC3.
(c) Turn the ignition switch to the on position.
(d) Using the Techstream, perform the zero point calibration Programming and Relearning.
OK:
COMPLETE is displayed.
NEXT -- Continue to next step.
12. PERFORM SENSITIVITY CHECK
(a) Using the Techstream, perform the sensitivity check Programming and Relearning.
(1) Confirm that nothing is placed on the passenger seat.
(2) Confirm that the beginning sensor reading is within the standard range.
Standard range:
-3.2 to 3.2 kg (-7 to 7 lb)
(3) Place a 30 kg (66.14 lb) weight (e.g. a lead mass) onto the front passenger seat.
(4) Confirm that the sensitivity is within the standard range.
Standard range:
27 to 33 kg (59.52 to 72.75 lb)
HINT: When performing the sensitivity check, use a solid metal weight (the check result may not be accurate if a liquid weight is used).

NEXT -- END