SRS DTC Troubleshooting: A1-1x
DTC A1-1x (‘‘x'' can be 0 thru 9 or A thru F):
Faulty Power Supply (VA Line)
  1. Turn the ignition switch ON (II), and wait for 10 seconds.
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. 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 -
NO -
Go to Step 11 .
  1. Turn the ignition switch OFF.
  1. Disconnect under-dash fuse/relay box connector J (2P).
  1. Check resistance between the No. 4 terminal of under-dash fuse/relay box connector J (4P) and the No. 17 terminal of SRS unit connector A (28P). There should be 0−1.0 Ω
Is the resistance as specified?
YES -
NO -
Open in the dashboard wire harness; replace the dashboard wire harness.■