Installation [06/2020 - 10/2022]: Procedure

1. Check that the ignition switch is off.
2. Check that the cable is disconnected from the negative (-) auxiliary battery terminal.
   WARNING:

   • Wait at least 60 seconds after disconnecting the cable from the negative (-) auxiliary battery terminal to disable the SRS system.
   • If the airbag deploys for any reason, it may cause a serious accident.
3. Temporary install the airbag ECU assembly.
4. Install the 3 bolts in the order shown in the illustration.

   Torque: 17.5 N*m (178 kgf*cm, 13 ft.*lbf) 

   NOTE:

   • If the airbag ECU assembly has been dropped, or there are any cracks, dents or other defects in the case or connector, replace the airbag ECU assembly with a new one.
   • When installing the airbag ECU assembly, be careful that the SRS wiring does not interfere with or is not pinched between other parts.
   • When the ignition switch is first turned to ON after the airbag ECU assembly has been replaced, make sure that no one is in the vehicle.
   Fig 1: Airbag ECU Assembly Tightening Squence

   Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
5. Connect the 3 connectors and push in the lock lever to lock the connector.
   NOTE:

   When connecting any airbag connector, take care not to damage the airbag wire harness.

   Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

   Push in

6. Check that there is no looseness in the installation parts of the airbag ECU assembly.

Refer to PROCEDURE - Step 20

Refer to INSTALLATION [06/2020 - 12/2021] , or refer to INSTALLATION [12/2021 - ]

Refer to INSTALLATION [06/2020 - 10/2022]

Refer to WORK PROCEDURE [06/2020 - 10/2022]

HINT: 

When disconnecting and reconnecting the auxiliary battery, there is an automatic learning function that completes learning when the respective system is used.

Refer to AUTOMATIC LEARNING CHART [06/2020 - 12/2021] , or refer to AUTOMATIC LEARNING CHART [12/2021 - ]

Refer to DTC CHECK / CLEAR [06/2020 - ]

Refer to OPERATION CHECK [06/2020 - ]

Refer to UTILITY [06/2020 - ]