DTC Troubleshooting: 31-3x

DTC 31-3x (31-30 to 31-39, 31-3A to 31-3F):

Short to Another Wire or Decreased Resistance in Left Side Airbag Inflator

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

SRS simulator lead E ( 07XAZ-S1A0200)

SRS short canceller ( 070AZ-SAA0100)

1.	Erase the DTC memory.

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 31-3x 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 for troubleshooting details.

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

4.	Disconnect the floor wire harness 2P connector (A) from the left side airbag. A07SAZ-TB4011A07XAZ-S1A0200

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

6.	Reconnect the battery negative cable.

7.	Erase the DTC memory.

8.	Read the DTC. Is DTC 31-3x indicated? YES - Go to 9. NO - Short to another wire in the left side airbag inflator; replace the left side airbag.n

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

10.	Disconnect both seat belt tensioner 4P connectors (A). A

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

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

13.	Connect the SRS short canceller (070AZ-SAA0100) to No. 21 and No. 22 terminals of SRS unit connector B (28P).

14.

Check resistance between the terminals of the SRS simulator lead E. There should be an open circuit, or at least 1 MW.

FLOOR WIRE HARNESS 2P CONNECTOR07XAZ-S1A0200

Is the resistance as specified?

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

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