DTC Troubleshooting: A1-1x

DTC A1-1x (A1-10 to A1-19, A1-1A to A1-1F):Faulty power supply (VAline)


1.Check the No. 10 (7.5A) fuse in the under-dash fuse/relay box.

Is the fuse OK?


YES - Go to 2.


NO - Short to ground in the under-dash fuse/relay box No.10 (7.5A) fuse circuit; refer to the ‘‘Electrical'' section.n


2.Turn the ignition swith ON (II) and wait for 30 seconds. Then turn the igunition switch OFF.

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 the battery voltage?


YES - Faulty SRS unit or poor contact at SRS unit connector A (28P) and the SRS unit; check the conection. 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 dashboard wire harness; replace the dashboard wire harness.