A4-1x

SRS DTC Troubleshooting: A3-1x, A4-1x

DTC A3-1x ("x" can be 0 thru 9 or A thru F):

SRS Unit Connector A Not Properly Installed

DTC A4-1x ("x" can be 0 thru 9 or A thru F):

SRS Unit Connector B Not Properly Installed

NOTE:

- Before doing this troubleshooting procedure, review SRS Precautions and Procedures Service and Repair, General Troubleshooting Information Reading and Clearing Diagnostic Trouble Codes, and Battery Terminal Disconnection and Reconnection Procedures.
- SRS unit: Before replacing the SRS unit, check the SRS unit software version with the HDS. If the software version is not the latest, update the SRS unit software SRS Unit Update, and retest.

1. Clear the DTCs with the HDS Reading and Clearing Diagnostic Trouble Codes.

2. Turn the ignition switch to ON (II), then wait for 10 seconds.

3. Check for the DTCs with the HDS Reading and Clearing Diagnostic Trouble Codes.

Is DTC A3-1x or A4-1x indicated?

YES -

Go to step 4.

NO -

Intermittent failure, the system is OK at this time. Go to Troubleshooting Intermittent Failures Reading and Clearing Diagnostic Trouble Codes. If another DTC is indicated, troubleshoot the DTC.�

4. Check the connection between SRS unit connector A or B (39P) and the SRS unit.

Is the connection OK?

YES -

Go to step 5.

NO -

Repair the poor connection, clear the DTC and retest.�

5. Turn the ignition switch to LOCK (0).

6. Disconnect the negative cable from the battery, then wait at least 3 minutes.

7. Disconnect SRS unit connector A (39P) or connector B (39P) from the SRS unit Service and Repair.

8. Check for bent or damaged terminals on the SRS unit.

Are any terminals bent or damaged?

YES -

Replace the dashboard wire harness, then clear the DTC.�

NO -

Replace the SRS unit SRS Unit Replacement.�