DTC Troubleshooting: B0021-11
DTC B0021-11: Short to Ground in the Left Side Curtain Airbag First Inflator
NOTE:

DTC Description
DTC
B0021-11 Short to ground in the left side curtain airbag first inflator
 

1.
Problem verification:

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.?
2.
Shorted wire check (LCA?, LCA? lines) 1:

Shorted wire check (LCA?, LCA? lines) 1
?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 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
Test point 2
Body ground

Test point 1
Test point 2
Body ground

Is there an open circuit, or at least 1 M??

     
YES
     
     
     
The LCA? and 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, 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 floor wire harness.?
     
NO
     
     
     
Go to step 3.
3.
Shorted wire check (LCA?, LCA? lines) 2:

Shorted wire check (LCA?, LCA? lines) 2
?1.

?2.

?3.
Disconnect the following connector.
Left side curtain airbag inflator 2P connector (on the floor wire harness)

?4.
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
Test point 2
Body ground

Test point 1
Test point 2
Body ground

Is there an open circuit, or at least 1 M??

     
YES
     
     
     
The LCA? and LCA? wires are OK. Short to ground in the 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.?