DTC Troubleshooting: 31-8x

DTC 31-8x (31-80 to 31-89, 31-8A to 31-8F):
Short to Power in Left Side Airbag Inflator

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

SRS simulator lead M (  070AZ-SNA0400)
 


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 31-8x 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 negative cable from the battery, and wait for 3 minutes.

4.Disconnect the floor wire harness 2P connector (A) from the left side airbag (B).

 

5.Connect the SRS inflator simulator (2 W connector) and simulator lead M to the floor wire harness.

6.Reconnect the negative cable to the battery.

7.Erase the DTC memory.

8.Read the DTC.

Is DTC 31-8x indicated?


YES - Go to 9.


NO - Short to power in the left side airbag inflator; replace the left side airbag.n


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

10.Disconnect both seat belt tensioner 4P connectors.

11.Disconnect SRS unit connector B (28P) from the SRS unit.

12.Disconnect the SRS inflator simulator from the SRS simulator lead.

13.Reconnect the negative cable to the battery.

14.Turn the ignition switch ON (II).

15.Check for voltage between each terminal of the SRS simulator lead and body ground. There should be 0.5 V or less.

 

Is the voltage as specified?


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


NO - Short to power in the floor wire harness; replace the floor wire harness.n