DTC Troubleshooting: 12-4

DTC 12-4:  Short to Power in Front Passenger's Side Airbag Inflator

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

SRS simulator lead E (  07XAZ-S1A0200)
 


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?


YES - Go to 3.


NO - Intermittent failure, system is OK at this time. Go to Troubleshooting Intermittent Failures.


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

4.Disconnect the SPo connector from the SPi connector (A).

 

5.Connect the special tool (2 W connector) to the SPi connector (A).

6.Reconnect the battery negative cable.

7.Erase the DTC memory.

8.Read the DTC.

Is DTC 12-4 indicated?


YES - Go to 9.


NO - Short to power in the front passenger's side airbag inflator; replace the front passenger's side airbag.n


9.Disconnect the battery negative cable, and wait for 3 minutes.

10.Disconnect the TL1o and TR1o connectors (A) from the TL1i and TR1i connectors (B).

 


11.Disconnect the U2o connector (A) from the SRS unit.

 

12.Reconnect the battery negative cable.

13.Turn the ignition switch ON (II).

14.Disconnect the SRS inflator simulator (special tool) from the SRS simulator lead C.

15.Check for voltage between the A terminal of the SRS simulator lead C (special tool) and body ground, and between the B terminal and body ground. There should be 0.5 V or less.

 

Is the voltage as specified?


YES - Faulty SRS unit; replace the SRS unit.n


NO - Replace the floor wire harness.n