A1-1x

SRS DTC Troubleshooting: A1-1x (x can be 0 thru 9 or A thru F)

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, Service and Repair General Troubleshooting Information, Initial Inspection and Diagnostic Overview and Battery Terminal Disconnection and Reconnection. Procedures

1. Clear the DTC memory. Initial Inspection and Diagnostic Overview

2. Turn the ignition switch to ON (II), and check that the SRS indicator comes on for about 6 seconds and then goes off.

3. Read the DTC. Initial Inspection and Diagnostic Overview

Is DTC A1-1x indicated?
YES - Go to step 4.

NO - Intermittent failure, the system is OK at this time. Go to Troubleshooting Intermittent Failures. Initial Inspection and Diagnostic Overview If another DTC is indicated, troubleshoot the DTC.


4. Turn the ignition switch to LOCK (0).

5. Check the No. 20 (7.5 A) fuse in the under-dash fuse/relay box.

Is the fuse OK?
YES - Go to step 6.

NO - Replace the fuse, then turn the ignition switch to ON (II). If the fuse blows again, check for a short in the No. 20 (7.5 A) fuse circuit (dashboard wire harness, floor wire harness, or ODS unit harness).


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

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

8. Turn the ignition switch to ON (II).

9. Measure the voltage between the terminal No. 17 of SRS unit connector A (28P) and body ground. Turn the ignition switch to ON (II), and measure the voltage. There should be battery voltage when the ignition is on.

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. SRS Unit Replacement

NO - Go to step 10.






10. Turn the ignition switch to LOCK (0).

11. Disconnect under-dash fuse/relay box connector X (39P).






12. Measure the resistance between the terminal No. 36 of under-dash fuse/relay box connector X (39P) and the terminal No. 17 of SRS unit connector A (28P). There should be less than 1.0 Ohms.

Is the resistance as specified?
YES - Open in the under-dash fuse/relay box or poor contact between connector X (39P) and the under-dash fuse/relay box; check the connection. If the connection is OK, replace the under-dash fuse/relay box. Under-Dash Fuse/Relay Box Removal and Installation

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