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 that they were properly installed .
- Before doing this troubleshooting procedure, review SRS Precautions and Procedures , General Troubleshooting Information , and Battery Terminal Disconnection and Reconnection .
- Before replacing the SRS unit, check the SRS unit software version with the HDS. If the software version is not the latest, update the SRS unit software , and retest.
| DTC Description | DTC |
|---|---|
| B0021-2B Short to another wire harness in the left side curtain airbag first inflator |
DTC (SRS)
- Problem verification
-1. Clear the DTCs with the HDS .
-2. Press the engine start/stop button to select the ON mode, then wait for 10 seconds.
-3. 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 B0020-2B Short to another wire harness in the driver's side airbag inflator B0028-2B Short to another wire harness in the front passenger's 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 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 B0020-2B, B0028-2B, B0029-2B, B0070-2B, B0072-2B, B0079-2B, 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 lines)
-1. Press the engine start/stop button to select the OFF 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. Check for continuity between test points 1 and 2 of SRS unit connector B (39P) according to table.
Test condition OFF mode SRS unit connector B (39P): disconnected DTC SRS unit connector B (39P) Test point 1 Test point 2 Test circuits From terminal Test circuits To terminal B0020-2B LCA+ No. 1 LSA+ No. 5 LCA- No. 2 LSA- No. 6 B0028-2B LCA+ No. 1 RSA+ No. 3 LCA- No. 2 RSA- No. 4 B0029-2B LCA+ No. 1 RCA+ No. 11 LCA- No. 2 RCA- No. 12 B0070-2B LCA+ No. 1 LRP+ No. 19 LCA- No. 2 LRP- No. 20 B0072-2B LCA+ No. 1 RRP+ No. 17 LCA- No. 2 RRP- No. 18 B0079-2B LCA+ No. 1 LLP+ No. 9 LCA- No. 2 LLP- No. 10 B0082-2B LCA+ No. 1 READ+ No. 15 LCA- No. 2 READ- No. 16 Is there continuity?
YES
Short to another wire in the floor wire harness; replace the floor wire harness, then clear the DTC.
NO
The LCA wires are OK. Faulty SRS unit or poor connection at SRS unit connector B (39P) and the SRS unit. Check the connection; if the connection is OK, replace the SRS unit . If the DTC does not clear, replace the floor wire harness.