DTC B0021-2B
DTC B0021-2B : Short to Another Wire Harness 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 12 Volt Battery Terminal Disconnection and Reconnection .
| DTC Description | DTC |
|---|---|
| B0021-2B Short to another wire harness in the left side curtain airbag first inflator |
DTC (SRS)
- Problem verification
-1. Apply the parking brake.
-2. Clear the DTCs with the HDS.
-3. Turn the vehicle to the ON mode, then wait for 10 seconds.
-4. Check for DTCs with the HDS.
DTC Description DTC B0021-2B Short to another wire harness in the left side curtain airbag first inflator Is DTC B0021-2B 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.
- DTC check
-1. Check for DTCs with the HDS.
DTC Description DTC B0001-2B Short to another wire harness in the driver's airbag first inflator B0004-2B Short to another wire harness in the driver's knee airbag inflator B0010-2B Short to another wire harness in the front passenger's airbag first inflator B0011-2B Short to another wire harness in the front passenger's airbag second inflator B0013-2B Short to another wire harness in the front passenger's knee airbag inflator B0020-2B Short to another wire harness in the left side airbag inflator B0028-2B Short to another wire harness in the right side airbag inflator B0029-2B Short to another wire harness in the right side curtain airbag first inflator B0070-2B Short to another wire harness in the driver's seat belt tensioner B0072-2B Short to another wire harness in the front passenger's seat belt tensioner B0079-2B Short to another wire harness in the driver's seat belt outer lap tensioner B007A-2B Short to another wire harness in the front passenger's seat belt outer lap tensioner B0082-2B Short to another wire harness in the selectable energy absorption device of the front passenger's seat belt tensioner B0021-2B Short to another wire harness in the left side curtain airbag first inflator Is DTC B0001-2B, B0004-2B, B0010-2B, B0011-2B, B0020-2B, B0028-2B, B0029-2B, B0070-2B, B0072-2B, B0079-2B, B007A-2B or B0082-2B indicated with DTC B0021-2B?
YES
Go to step 3.
NO
Short to another wire in the floor wire harness; replace the floor wire harness, then clear the DTC.
- Shorted wire check (LCA lines to another line)
-1. Turn the vehicle to the OFF (LOCK) mode.
-2. Disconnect the negative cable from the 12 volt battery, then wait at least 3 minutes.
-3. Disconnect the following connector.
SRS unit connector A (43P) SRS unit connector B (57P) Inflator connectors which are assigned to 2B codes listed on HDS: disconnected Left side curtain airbag inflator 2P connector (on the floor wire harness): disconnected -4. Check for continuity between test points 1 and 2.
Test condition Vehicle OFF (LOCK) mode SRS unit connector A (43P): disconnected SRS unit connector B (57P): disconnected Inflator connectors which are assigned to 2B codes listed on HDS: disconnected Left side curtain airbag inflator 2P connector (on the floor wire harness): disconnected DTC SRS unit connector B (57P) Test point 1 Test point 2 From terminal To terminal B0020-2B No. 9 No. 28 No. 10 No. 27 B0028-2B No. 9 No. 12 No. 10 No. 11 B0029-2B No. 9 No. 4 No. 10 No. 3 B0070-2B No. 9 No. 20 No. 10 No. 19 B0072-2B No. 9 No. 17 No. 10 No. 18 B0079-2B No. 9 No. 16 No. 10 No. 15 B007A-2B No. 9 No. 13 No. 10 No. 14 B0082-2B No. 9 No. 25 No. 10 No. 26 DTC SRS unit connector B (57P) SRS unit connector A (43P) Test point 1 Test point 2 From terminal To terminal B0001-2B No. 9 No. 7 No. 10 No. 6 B0004-2B No. 9 No. 14 No. 10 No. 15 B0010-2B No. 9 No. 4 No. 10 No. 5 B0011-2B No. 9 No. 10 No. 10 No. 11 B0013-2B No. 9 No. 13 No. 10 No. 12 Is there continuity?
YES
Short to another wire in the dashboard wire harness or the floor wire harness; replace the faulty harness, then clear the DTC.
NO
The LCA wires are OK. Faulty SRS unit or poor connection at SRS unit connector A (43P) and the SRS unit or SRS unit connector B (57P) and the SRS unit. Check the connection; if the connection is OK, check for any authorized service information related to the DTCs or symptoms you are troubleshooting or replace the SRS unit . If the DTC does not clear, replace the dashboard wire harness or the floor wire harness.