DTC 12-8x: Short to Power 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 12-8x 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. Shorted wire check (RA1+, RA1- lines to power) 1:
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. Disconnect the following connector.
SRS unit connector A (39P) 4. Reconnect the negative cable to the 12 volt battery.
5. Turn the vehicle to the ON mode.
6. Measure the voltage between test points 1 and 2.
Test condition Vehicle ON mode SRS unit connector A (39P): disconnected Test point 1 SRS unit connector A (39P) No. 6 Test point 2 Body ground Test point 1 SRS unit connector A (39P) No. 7 Test point 2 Body ground Is there 0.2 V or less?
YES
The RA1+ and RA1- wires are OK. Replace the SRS unit .
NO
Go to step 3.
- 3. Shorted wire check (RA1+, RA1- lines to power) 2:
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. Reconnect the negative cable to the 12 volt battery.
6. Turn the vehicle to the ON mode.
7. Measure the voltage between test points 1 and 2.
Test condition Vehicle ON mode SRS unit connector A (39P): disconnected Front passenger's airbag inflator 4P connector (on the dashboard wire harness): disconnected Test point 1 SRS unit connector A (39P) No. 6 Test point 2 Body ground Test point 1 SRS unit connector A (39P) No. 7 Test point 2 Body ground Is there 0.2 V or less?
YES
The RA1+ and RA1- wires are OK. Faulty front passenger's airbag first inflator; replace the front passenger's airbag , then clear the DTC.
NO
Short to power in the dashboard wire harness; replace the dashboard wire harness, then clear the DTC.