DTC Troubleshooting: 12-1x, 12-4x

DTC 12-1x (12-10 to 12-19, 12-1A to 12-1F):
Open in Front Passenger's Airbag First Inflator (LHD type)
  
  

Special Tools Required
SRS inflator simulator (  07SAZ-TB4011A)
 

SRS simulator lead F (  07XAZ-SZ30100)
 
SRS simulator lead C (  07TAZ-SZ5011A)
 


1.Erase the DTC memory.

2.Turn the ignition switch ON (II), and check that the SRS indicator comes on for about 6 seconds and then goes off.

Does the SRS indicator stay on, and is DTC 12-1x or 12-4x indicated?


YES - Go to 3.


NO - Intermittent failure, system is OK at this time.Go to Troubleshooting Intermittent Failures. If another DTC is indicated, go to the DTC troubleshooting index.


3.Turn the ignition switch OFF. Disconnect the battery negative cable, and wait for 3 minutes.

4.Disconnect the front passenger's airbag 4P [or 2P] connector (A) from dashboard wire harness B.
[ ]: Except KX and KD models

KX and KD models 

Except KX and KD models 

5.Connect the SRS inflator simulator (2 W connectors) and simulator lead F or C to the dashboard wire harness B

6.Reconnect the battery negative cable.

7.Erase the DTC memory.

8.Read the DTC.

Is DTC 12-1x or 12-4x indicated?


YES - Go to 9.


NO - Open or increased resistance in the front passenger's airbag first or second inflator; replace the front passenger's airbag.n

9.Turn the ignition switch OFF. Disconnect the battery negative cable, and wait for 3 minutes.

10.Disconnect SRS unit connector A (28P) from the SRS unit. Do not disconnect the simulator lead from the dashboard wire harness B 4P [or 2P] connector.

11.Disconnect the SRS inflator simulator from the SRS simulator lead [or SRS simulator lead C].

12.Check resistance between the terminals of the SRS simulator lead [or SRS simulator lead C]. There should be 1 W or less.
[ ]: Except KX and KD models

KX and KD models 

Except KX and KD models 

Is the resistance as specified?


YES - Faulty SRS unit or poor contact at SRS unit connector A (28P). Check the connection; if the connection is OK, replace the SRS unit.n


NO - Open or increased resistance in the dashboard wire harness B; replace the dashboard wire harness B.n