DTC B0021-11 (2017 2018 2019 2020)
DTC B0021-11 : Short to Ground in the Left Side Curtain Airbag First Inflator
- Before doing this troubleshooting procedure, find out if the vehicle was in a collision. If so, verify that all the required components were replaced with new components of the correct part number and were properly installed .
- Before doing this troubleshooting procedure, review SRS Precautions and Procedures , General Troubleshooting Information , and Battery Terminal Disconnection and Reconnection. - Refer to: Battery Terminal Disconnection and Reconnection (2016 2017 2018 2019 2020) .
| DTC Description | DTC |
|---|---|
| B0021-11 Short to ground in the left side curtain airbag first inflator |
DTC (SRS)
- Problem verification
-1. Clear the DTCs with the HDS.
- 2. Turn the vehicle to the ON mode, then wait for 10 seconds.
- 3. Check for DTCs with the HDS.
DTC Description DTC B0021-11 Short to ground in the left side curtain airbag first inflator Is DTC B0021-11 indicated?
YES
The failure is duplicated. Go to step 2.
NO
Intermittent failure, the system is OK at this time. Go to Troubleshooting Intermittent Failures. If another DTC is indicated, troubleshoot the DTC.
- Shorted wire check (LCA1+, LCA1- lines) 1
-1. Turn the vehicle to the OFF (LOCK) mode.
- 2. Disconnect the negative cable from the Battery, then wait at least 3 minutes.
- 3. Disconnect the following connector.
SRS unit connector B (39P) - 4. Measure the resistance between test points 1 and 2.
Test condition Vehicle OFF (LOCK) mode SRS unit connector B (39P): disconnected Test point 1 SRS unit connector B (39P) No. 9 - Refer to: SRS Unit Connector for Inputs and Outputs (2017 2018 2019 2020) Test point 2 Body ground Test point 1 SRS unit connector B (39P) No. 10 - Refer to: SRS Unit Connector for Inputs and Outputs (2017 2018 2019 2020) Test point 2 Body ground Is there an open circuit, or at least 1 MΩ?
YES
The LCA1+ and LCA1- wires are OK. Check for any authorized service information related to the DTCs or symptoms you are troubleshooting or replace the SRS unit - Refer to: SRS Unit Removal and Installation (2017 2018 2019 2020), .
NO
Go to step 3.
- Shorted wire check (LCA1+, LCA1- lines) 2
-1. Remove the headliner.
- 2. Disconnect the following connector.
Left side curtain airbag inflator 2P connector (on the floor wire harness) - 3. Measure the resistance between test points 1 and 2.
Test condition Vehicle OFF (LOCK) mode SRS unit connector B (39P): disconnected Left side curtain airbag inflator 2P connector (on the floor wire harness): disconnected Test point 1 SRS unit connector B (39P) No. 9 - Refer to: SRS Unit Connector for Inputs and Outputs (2017 2018 2019 2020) Test point 2 Body ground Test point 1 SRS unit connector B (39P) No. 10 - Refer to: SRS Unit Connector for Inputs and Outputs (2017 2018 2019 2020) Test point 2 Body ground Is there an open circuit, or at least 1 MΩ?
YES
The LCA1+ and LCA1- wires are OK. Faulty left side curtain airbag inflator; replace the left side curtain airbag , then clear the DTC.
NO
Short to ground in the floor wire harness; replace the floor wire harness, then clear the DTC.