SRS DTC Troubleshooting: A1-1x
DTC A1-1x (‘‘x'' can be 0 thru 9 or A thru F):
Faulty Power Supply (VA Line)
NOTE: Before doing this troubleshooting procedure, review SRS Precautions and Procedures.
  1. Erase the DTC memory.
  1. Turn the ignition switch ON (II), and wait for 10 seconds.
  1. Read the DTC.
Is DTC A1-1x indicated?
YES -
Go to Step 4 .
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.
  1. Turn the ignition switch OFF.
  1. Check the No. 9 (7.5 A) fuse in the under-dash fuse/relay box.
Is the fuse OK?
YES -
Go to Step 6 .
NO -
Replace the No. 9 (7.5 A) fuse.
  1. Disconnect the negative cable from the battery, and wait for 3 minutes.
  1. Disconnect the SRS unit connector A (28P) from the SRS unit.
  1. Reconnect the negative cable to the battery.
  1. Turn the ignition switch ON (II).
  1. Check for voltage between the No. 17 terminal of SRS unit connector (A) 28P and body ground. There should be battery voltage.
Is there battery voltage?
YES -
Faulty SRS unit or poor contact at SRS unit connector (A) 28P and the SRS unit. Check the connection between the connector and the SRS unit. If the connection is OK, replace the SRS unit.
NO -
Go to Step 11 .
  1. Turn the ignition switch OFF.