DTC Troubleshooting: A1-1x

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

1.Erase the DTC memory.

2.Turn the ignition switch ON (II), and wait for 10 seconds.

3.Read the DTC.

Is DTC A1-1x indicated?


YES - Go to 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.


4.Turn the ignition switch OFF.

5.Check the No. 9 (7.5 A) fuse in the under-dash fuse/relay box.

Is the fuse OK?


YES - Go to 6.


NO - Replace the No. 9 (7.5 A) fuse.


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

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

8.Reconnect the negative cable to the battery.

9.Turn the ignition switch ON (II).

10.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 connection 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 11.


11.Turn the ignition switch OFF.

12.Disconnect under-dash fuse/relay box connector J (4P).

 

13.Check resistance between the No. 4 terminal of the 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 W.

 

Is the resistance as specified?


YES - Open in the under-dash fuse/relay box or poor connection between connector J (4P) and the driver's 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; replace the dashboard wire harness.n