Last Modified: 08-21-2023 6.11:8.1.0 Doc ID: RM100000001AR92
Model Year Start: 2019 Model: Avalon HV Prod Date Range: [04/2018 -           ]
Title: SUPPLEMENTAL RESTRAINT SYSTEMS: AIRBAG SYSTEM (for HV Model): OPERATION CHECK; 2019 - 2022 MY Avalon HV [04/2018 -        ]

OPERATION CHECK

PRECAUTION FOR OPERATION CHECK

CAUTION:

Use the correct procedure to replace the airbag parts.

CHECK SRS WARNING LIGHT

(a) Primary check

(1) Turn the power switch on (IG) and check that the SRS warning light comes on.

(2) Turn the power switch off. Wait for at least 2 seconds, then turn the power switch on (IG). The SRS warning light comes on for approximately 6 seconds and diagnosis of the airbag system is performed.

NOTICE:

Turn the power switch off when the auxiliary battery is connected.

HINT:

  • 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 in the SRS airbag system.
  • If the SRS 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 SRS warning light illuminates after turning the power switch off or to 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 power source voltage drop. The SRS warning light turns off 10 seconds after the power source voltage returns to normal.

FUNCTION OF PASSENGER AIRBAG ON/OFF INDICATOR

(a) Initial check

(1) Turn the power switch on (IG).

(2) The passenger airbag ON/OFF indicator comes on for approximately 4 seconds, then turns off for approximately 2 seconds.

(3) 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.

Indicator Operation

Front Passenger Seat Condition

Passenger Airbag ON/OFF Indicator

SRS Warning Light

ON Indicator

OFF Indicator

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.

HINT:

  • The passenger airbag ON/OFF indicator illuminates based on the following timing chart in order to check the indicator light circuit.
  • When the occupant classification system is malfunctioning, both the SRS warning light and passenger airbag ON/OFF indicator ("OFF") come on. In this case, perform troubleshooting for the airbag system DTCs first.

PASSENGER AIRBAG ON/OFF INDICATOR CHECK

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

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

HINT:

Refer to the indicator operation table in Function of Passenger Airbag ON/OFF Indicator for the passenger airbag ON/OFF indicator operation when the power switch is turned on (IG) and approximately 6 seconds elapse.

CHECK HORN BUTTON ASSEMBLY

Click here 2019 - 2022 MY Avalon Avalon HV [04/2018 -        ]; SUPPLEMENTAL RESTRAINT SYSTEMS: STEERING PAD: ON-VEHICLE INSPECTION

CHECK INSTRUMENT PANEL PASSENGER AIRBAG ASSEMBLY

Click here 2019 - 2022 MY Avalon Avalon HV [04/2018 -        ]; SUPPLEMENTAL RESTRAINT SYSTEMS: FRONT PASSENGER AIRBAG ASSEMBLY: ON-VEHICLE INSPECTION

CHECK LOWER NO. 1 INSTRUMENT PANEL AIRBAG ASSEMBLY

Click here 2019 - 2022 MY Avalon Avalon HV [04/2018 -        ]; SUPPLEMENTAL RESTRAINT SYSTEMS: KNEE AIRBAG ASSEMBLY (for Driver Side): ON-VEHICLE INSPECTION

CHECK LOWER NO. 2 INSTRUMENT PANEL AIRBAG ASSEMBLY

Click here 2019 - 2022 MY Avalon Avalon HV [04/2018 -        ]; SUPPLEMENTAL RESTRAINT SYSTEMS: KNEE AIRBAG ASSEMBLY (for Front Passenger Side): ON-VEHICLE INSPECTION

CHECK FRONT SEAT AIRBAG ASSEMBLY

Click here 2019 - 2022 MY Avalon Avalon HV [04/2018 -        ]; SUPPLEMENTAL RESTRAINT SYSTEMS: FRONT SEAT SIDE AIRBAG ASSEMBLY: ON-VEHICLE INSPECTION

CHECK REAR SEAT AIRBAG ASSEMBLY

Click here 2019 - 2022 MY Avalon Avalon HV [04/2018 -        ]; SUPPLEMENTAL RESTRAINT SYSTEMS: REAR SEAT SIDE AIRBAG ASSEMBLY: ON-VEHICLE INSPECTION

CHECK CURTAIN SHIELD AIRBAG ASSEMBLY

Click here 2019 - 2022 MY Avalon Avalon HV [04/2018 -        ]; SUPPLEMENTAL RESTRAINT SYSTEMS: CURTAIN SHIELD AIRBAG ASSEMBLY: ON-VEHICLE INSPECTION

CHECK FRONT SEAT OUTER BELT ASSEMBLY

Click here 2019 - 2022 MY Avalon Avalon HV [04/2018 -        ]; SEAT BELT: FRONT SEAT OUTER BELT ASSEMBLY: ON-VEHICLE INSPECTION

CHECK REAR SEAT 3 POINT TYPE BELT ASSEMBLY

Click here 2019 - 2022 MY Avalon Avalon HV [04/2018 -        ]; SEAT BELT: REAR SEAT OUTER BELT ASSEMBLY: ON-VEHICLE INSPECTION

CHECK AIRBAG ECU ASSEMBLY

Click here 2019 - 2022 MY Avalon Avalon HV [04/2018 -        ]; SUPPLEMENTAL RESTRAINT SYSTEMS: CENTER AIRBAG SENSOR ASSEMBLY: ON-VEHICLE INSPECTION

CHECK FRONT AIRBAG SENSOR

Click here 2019 - 2022 MY Avalon Avalon HV [04/2018 -        ]; SUPPLEMENTAL RESTRAINT SYSTEMS: FRONT AIRBAG SENSOR: ON-VEHICLE INSPECTION

CHECK SIDE AIRBAG PRESSURE SENSOR

Click here 2019 - 2022 MY Avalon Avalon HV [04/2018 -        ]; SUPPLEMENTAL RESTRAINT SYSTEMS: SIDE AIRBAG SENSOR (for Front Door): ON-VEHICLE INSPECTION

CHECK SIDE NO. 1 AIRBAG SENSOR

Click here 2019 - 2022 MY Avalon Avalon HV [04/2018 -        ]; SUPPLEMENTAL RESTRAINT SYSTEMS: SIDE AIRBAG SENSOR (for Center Pillar): ON-VEHICLE INSPECTION

CHECK SIDE NO. 2 AIRBAG SENSOR

Click here 2019 - 2022 MY Avalon Avalon HV [04/2018 -        ]; SUPPLEMENTAL RESTRAINT SYSTEMS: REAR AIRBAG SENSOR: ON-VEHICLE INSPECTION

CHECK SEAT POSITION AIRBAG SENSOR

Click here 2019 - 2022 MY Avalon Avalon HV [04/2018 -        ]; SUPPLEMENTAL RESTRAINT SYSTEMS: SEAT POSITION SENSOR: ON-VEHICLE INSPECTION

CHECK OCCUPANT DETECTION ECU

Click here 2019 - 2022 MY Avalon Avalon HV [04/2018 -        ]; SUPPLEMENTAL RESTRAINT SYSTEMS: OCCUPANT CLASSIFICATION ECU: ON-VEHICLE INSPECTION

CHECK HARNESS AND CONNECTOR

(a) for Vehicle not Involved in Collision

(1) Perform a diagnostic system check.

(b) for Vehicle Involved in Collision and Airbag not Deployed

(1) Perform a diagnostic system check.

(c) for Vehicle Involved in Collision and Airbag is Deployed

(1) Perform a diagnostic system check.

(2) Check any of the wire harnesses in exposed contact with the airbag wire harness for damage.

(3) Check the connector of the airbag wire harness for scratches, cracks or damage.