AIRBAG SYSTEM

PRECAUTION FOR OPERATION CHECK

CAUTION:

Use the correct procedure to replace the airbag parts.

CHECK SRS WARNING LIGHT

Primary check
1. Turn the power switch on (IG) and check that the SRS warning light turn on.
2. Turn the power switch off. Wait for at least 2 seconds, and then turn the power switch on (IG). The SRS warning light comes on for approximately 6 seconds and diagnosis of the airbag system (including the seat belt pretensioners) is performed.
  
  Note:
  Turn the power switch off when the auxiliary battery is connected.
  Tip:
  - If the SRS warning light remains on for approximately 6 seconds or more after the power switch has been turned on (IG), there may be a malfunction with the SRS airbag system.
  - If the warning light occasionally turns on approximately 6 seconds or more after the power switch has been turned on (IG), there may be a short to +B, short to ground or an open in the SRS warning light circuit.
  - If the warning light illuminates after turning the power switch off or on (ACC), there may be a malfunction in the power source circuit or combination meter assembly.
  - The SRS warning light turns off, and then turns on. This blinking pattern indicates a source voltage drop. The SRS warning light turns off 10 seconds after the source voltage returns to normal.

FUNCTION OF PASSENGER AIRBAG ON/OFF INDICATOR (w/ Airbag Cutoff Switch)

Initial check

Turn the power switch on (IG).
The passenger airbag ON/OFF indicator comes on for approximately 4 seconds, and then goes off for approximately 2 seconds.

Approximately 6 seconds after the power switch is turned on (IG), the passenger airbag ON/OFF indicator will indicate ON/OFF according to the airbag cutoff switch cylinder sub-assembly condition as listed below.

Table 1. Indicator Operation
Airbag Cutoff Switch Cylinder Sub-assembly Condition	Passenger Airbag ON/OFF Indicator		SRS Warning Light
Airbag Cutoff Switch Cylinder Sub-assembly Condition	ON Indicator	OFF Indicator	SRS Warning Light
On	On	Off	Off
Off	Off	On	Off
Switch failure	Off	On	On

Tip:

If the passenger airbag ON/OFF indicator does not operate as specified in the table according to the airbag cutoff switch cylinder sub-assembly status and the SRS warning light is not illuminated, no DTC will be output. Therefore, perform troubleshooting for Trouble in Passenger Airbag ON/OFF Indicator.

FUNCTION OF PASSENGER AIRBAG ON/OFF INDICATOR (w/ Occupant Classification System)

Initial check

Turn the power switch on (IG).
The passenger airbag ON/OFF indicator comes on for approximately 4 seconds, and then goes off for approximately 2 seconds.

Approximately 6 seconds after the power switch is turned on (IG), the passenger airbag ON/OFF indicator will indicate ON/OFF depending on the following conditions.

Table 2. Indicator Operation
Front Passenger Seat Condition	Passenger Airbag ON/OFF Indicator		SRS Warning Light
Front Passenger Seat Condition	ON Indicator	OFF Indicator	SRS Warning Light
Vacant	OFF	ON	OFF
Adult*1 is seated	ON	OFF	OFF
Child*2 is seated	ON or OFF*2	OFF or ON*2	OFF
Child restraint system is installed	OFF	ON	OFF
Occupant classification system failure	OFF	ON	ON

*1: The system judges a person of average adult weight or more as an adult. If a smaller adult sits in the front passenger seat, the system may not recognize them as an adult depending on their physique and posture.
*2: The system may not recognize a child or a child in a child restrain system as a child depending on factors such as the positioning of the child restraint system or the child's physique or posture.

Tip:

The timing chart below shows the operation of the passenger airbag ON/OFF indicator. Use the chart to check the indicator light circuit.
When the occupant classification system has trouble, both the SRS warning light and passenger airbag ON/OFF indicator ("OFF") come on. In this case, check for DTCs for "Airbag System" first. Then troubleshoot the occupant classification system if DTC B1650/32 is output, and troubleshoot the passenger airbag ON/OFF indicator if DTC B1660/43 is output.

CHECK PASSENGER AIRBAG ON/OFF INDICATOR (w/ Passenger Airbag ON/OFF Indicator)

Turn the power switch on (IG).
*A Type A

*B Type B

Check that the passenger airbag ON/OFF indicator ("ON" and "OFF") comes on for approximately 4 seconds, and then goes off for approximately 2 seconds.

Tip:
In order to check the operation of the passenger airbag ON/OFF indicator when approximately 6 seconds have elapsed after turning the power switch on (IG), refer to the table in the previous step.

CHECK HORN BUTTON ASSEMBLY

*A	Type A
*B	Type B

AIRBAG SYSTEM OPERATION CHECK