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. 10 (7.5 A) fuse in the under-dash fuse/relay box.

Is the fuse OK?

YES | - | Go to Step 2 .
NO | - | Short to ground in the under-dash fuse/relay box No.10 (7.5 A) fuse circuit.■

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

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

1. Reconnect the battery negative cable.

1. 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 connection. If the connection is OK, replace the SRS unit.■
NO | - | Go to Step 6 .

1. Turn the ignition switch OFF.

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

1. 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 Ω.

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