SRS System

Control System DTCs

SRS DTC Troubleshooting: A4-1x

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, find out if the vehicle was in a collision. If so, verify that all the required components were replaced with new components, of the correct part number, and that they were properly installed Service and Repair.
* 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.
* 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 Programming and Relearning, and retest.


1. Problem verification:

-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 DTCs with the HDS Reading and Clearing Diagnostic Trouble Codes.

Is DTC A4-1x indicated?
-YES- The failure is duplicated. Go to step 2.
-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.

2. Connector connection check:

-1. Turn the ignition switch to LOCK (0).

-2. Check the following connector connection.






Is the connector OK?
-YES- Go to step 4.
-NO- Go to step 3.

3. System check:

-1. Repair the poor connector connection which was the cause of the problem in step 2.

-2. Clear the DTCs with the HDS Reading and Clearing Diagnostic Trouble Codes.

-3. Turn the ignition switch to ON (II), then wait for 10 seconds.

-4. Check for DTCs with the HDS Reading and Clearing Diagnostic Trouble Codes.

Is DTC A4-1x indicated?
-YES- Turn the ignition switch to LOCK (0), then go to step 4.
-NO- The system is OK at this time.

4. SRS unit check:

-1. Disconnect the negative cable from the battery, then wait at least 3 minutes.

-2. Disconnect the following connector.






-3. Check for bent or damaged terminals on the SRS unit.

Are any terminals bent or damaged?
-YES- Replace the SRS unit Service and Repair.
-NO- Replace the floor wire harness, then clear the DTC.