DTC 12-1x: Open in the Front Passenger's Airbag First Inflator; DTC 12-2x: Increased Resistance in the Front Passenger's Airbag First Inflator
NOTE:
- 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 12 Volt 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.
- 1. Problem verification:
1. Clear the DTCs with the HDS .
2. Turn the vehicle to the ON mode, then wait for 10 seconds.
3. Check for DTCs with the HDS .
Is DTC 12-1x or 12-2x 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.
- 2. Front passenger's airbag inflator check:
1. Turn the vehicle to the OFF (LOCK) mode.
2. Disconnect the negative cable from the 12 volt battery, then wait at least 3 minutes.
3. Lower the globe box .
4. Disconnect the following connector.
Front passenger's airbag inflator 4P connector (on the dashboard wire harness) 5. Connect terminals A and B with a jumper wire.
Terminal A Front passenger's airbag inflator 4P connector No. 2 (on the dashboard wire harness) Terminal B Front passenger's airbag inflator 4P connector No. 3 (on the dashboard wire harness) 6. Reconnect the negative cable to the 12 volt battery.
7. Clear the DTCs with the HDS .
8. Turn the vehicle to the ON mode, then wait for 10 seconds.
9. Check for DTCs with the HDS .
Is DTC 12-1x or 12-2x indicated?
YES
Go to step 3.
NO
Faulty front passenger's airbag first inflator; replace the front passenger's airbag , then clear the DTC.
- 3. Open wire check (RA1+, RA1- lines):
1. Turn the vehicle to the OFF (LOCK) mode.
2. Disconnect the negative cable from the 12 volt battery, then wait at least 3 minutes.
3. Remove the jumper wire from the front passenger's airbag inflator 4P connector on the dashboard wire harness.
4. Disconnect the following connector.
SRS unit connector A (39P) 5. Connect terminals A and B with a jumper wire.
Terminal A SRS unit connector A (39P) No. 6 Terminal B SRS unit connector A (39P) No. 7 6. Measure the resistance between test points 1 and 2.
Test condition Vehicle OFF (LOCK) mode Front passenger's airbag inflator 4P connector (on the dashboard wire harness): disconnected SRS unit connector A (39P): disconnected SRS unit connector A (39P) terminals No. 6 and No. 7: jumped Test point 1 Front passenger's airbag inflator 4P connector No. 2 (on the dashboard wire harness) Test point 2 Front passenger's airbag inflator 4P connector No. 3 (on the dashboard wire harness) Is there 1.0 Ω or less?
YES
The RA1+ and RA1- wires are 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 or increased resistance in the dashboard wire harness; replace the dashboard wire harness, then clear the DTC.
