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 and General Troubleshooting Information.
  • 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 and retest.
  1. Clear the DTC memory.
  1. Turn the ignition switch to ON (II), then wait for 10 seconds.
  1. Read the DTC.
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. If another DTC is indicated, troubleshoot the DTC.
  1. Check the connection between the 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 and retest.
  1. Turn the ignition switch to LOCK (0).
  1. Do the battery terminal disconnection procedure , then wait for 3 minutes.
  1. Disconnect SRS unit connector A (39P) from the SRS unit.
  1. Check for bent or damaged terminals on the SRS unit.
Are any terminals bent or damaged?
YES -
Replace the dashboard wire harness.■
NO -
Replace the SRS unit. ■