DTC Troubleshooting: A1-1x

DTC A1-1x (A1-10 to A1-19, A1-1A to A1-1F):
Faulty Power Supply (VA Line)

1.Check the No. 17 (15A) fuse in the under-dash
fuse/relay box.

Is the fuse OK?


YES - Go to 2.


NO - Replace the fuse, then turn the ignition switch ON (II). If the fuse blows again, check for a short in the No. 17 (15A) fuse circuit (dashboard wire harness B).n


2.Disconnect the battery negative cable, and wait for 3 minutes.

3.Disconnect SRS unit connector A (28P) from the SRS unit.

4.Reconnect the battery negative cable.

5.Connect a voltmeter between the No. 17 terminal of SRS unit connector A (28P) and body ground. Turn the ignition switch ON (II), and measure voltage. 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. If the connection is OK, replace the SRS unit.n


NO - Go to 6.


6.Turn the ignition switch OFF.

7.Disconnect under-dash fuse/relay box connector S (2P).

 

8.Check resistance between the No. 1 terminal of under-dash fuse/relay box connector S (2P) and the No. 17 terminal of SRS unit connector A (28P). There should be 0-1.0 W.

 

Is the resistance as specified?


YES - Open in the under-dash fuse/relay box or poor contact between connector S (2P) and the under-dash fuse/relay box; check the connection. If the connection is OK, replace the under-dash fuse/relay box.n


NO - Open in the dashboard wire harness B; replace the dashboard wire harness B.n