A4-1x

SRS DTC Troubleshooting: A3-1x, A4-1x (x can be 0 thru 9 or A thru F)

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, Technician Safety Information General Troubleshooting Information, Initial Inspection and Diagnostic Overview 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 DTC memory. Initial Inspection and Diagnostic Overview

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

3. Read the DTC. Initial Inspection and Diagnostic Overview

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. Initial Inspection and Diagnostic Overview 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, then clear the DTC.


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. Technician Safety Information

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