SRS DTC A1-1x
DTC A1-1x ("x" can be 0 thru 9 or A thru F) : Faulty Power Supply (VA line)
- Before doing this troubleshooting procedure, find out if the vehicle was in a collision. If so, verify that all the required components were replaced with new components, of the correct part number, and that they were properly installed .
- Before doing this troubleshooting procedure, review SRS Precautions and Procedures , General Troubleshooting Information , and Battery Terminal Disconnection and Reconnection .
- Before replacing the SRS unit, check the SRS unit software version with the HDS. If the software version is not the latest, update the SRS unit software , and retest.
| DTC Description | DTC |
|---|---|
DTC (SRS)
- Problem verification
-1. Clear the DTCs with the HDS .
-2. Press the engine start/stop button to select the ON mode, then wait for 10 seconds.
-3. Check for DTCs with the HDS .
DTC Description DTC Is DTC A1-1x indicated?
YES
The failure is duplicated. Go to step 2.
NO
Intermittent failure, the system is OK at this time. Go to Troubleshooting Intermittent Failures . If another DTC is indicated, troubleshoot the DTC.
- Fuse check
-1. Press the engine start/stop button to select the OFF mode.
-2. Check the following fuse.
Fuse No. B29 (7.5 A) Location Under-dash fuse/relay box Is the fuse OK?
YES
Go to step 3.
NO
Replace the fuse, then press the engine start/stop button to select the ON mode. If the fuse blows again, check for a short to ground in the under-dash fuse/relay box No. B29 (7.5 A) fuse circuit (dashboard wire harness, floor wire harness, or front passenger's seat wire harness); replace the faulty harness, then clear the DTC, and retest. If the DTC is still present, replace the under-dash fuse/relay box , then clear the DTC.
- Open wire check (VA line)
-1. Disconnect the negative cable from the battery, then wait at least 3 minutes.
-2. Disconnect the following connector.
SRS unit connector A (39P) -3. Reconnect the negative cable to the battery.
-4. Press the engine start/stop button to select the ON mode.
-5. Measure the voltage between test points 1 and 2.
Test condition ON mode SRS unit connector A (39P): disconnected Test circuit VA Test point 1 SRS unit connector A (39P) No. 39 Test point 2 Body ground Is there battery voltage?
YES
The VA wire is OK. Faulty SRS unit or poor connection at SRS unit connector A (39P) and the SRS unit; check the connection. If the connection is OK, replace the SRS unit . If the DTC does not clear, replace the dashboard wire harness.
NO
Open in the dashboard wire harness or faulty under-dash fuse/relay box; replace the dashboard wire harness or the under-dash fuse/relay box , then clear the DTC.