DTC A2-1x

DTC A2-1x ("x" can be 0 thru 9 or A thru F) Faulty Power Supply (VB line)

1. Check the No.2 (10 A) fuse in the driver's Under-dash fuse/relay box.

Is the fuse OK?

YES - Go to step 2.

NO - Replace the fuse, then turn the ignition switch ON (II). If the fuse blows again, check for a short to ground in the driver's under-dash fuse/relay box No. 2 (10 A) fuse line, in dashboard wire harness A, or in the SRS subharness replace the driver's under-dash fuse/relay box.

2. Turn the ignition switch OFF. Disconnect the negative cable from the battery.
3. Disconnect SRS unit connector A (28P) from the SRS unit.
4. Reconnect the negative cable to the battery.




5. Connect a voltmeter between the No. 18 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 connection at SRS unit connector A (28P) and the SRS unit check the connection. If the connection is OK, replace the SRS unit.

NO - Go to step 6.

6. Turn the ignition switch OFF.




7. Disconnect driver's under-dash fuse/relay box connector B (2P).




8. Check resistance between the No. 2 terminal of drivers under-dash fuse/relay box connector B (2P) and the No. 18 terminal of SRS unit connector A (28P). There should be less than 1.0 ohm.

Is the resistance as specified?

YES - Open in the driver's under-dash fuse/relay box or poor connection at driver's under-dash fuse/relay box connector B (2P) and the driver's under-dash fuse/relay box check the connection. If the connection is OK, replace the driver's under-dash fuse/relay box.

NO - Go to step 9.




9. Disconnect dashboard wire harness A 28P connector C821 (A) from SRS subharness connector C821 (B).




10. Check resistance between the No. 2 terminal of driver's under-dash fuse/relay box connector B (2P) and the No. 27 terminal of dashboard wire harness A 28P connector C821. There should be less than 1.0 ohm.

Is the resistance as specified?

YES - Open in the SRS subharness replace the SRS subharness.

NO - Open in dashboard wire harness A replace dashboard wire harness A.