41-1x
SRS DTC Troubleshooting: 41-1x
DTC 41-1x ("x" can be 0 thru 9 or A thru F):
No Signal From the Left Front Impact Sensor
Special Tools Required
- SRS Inflator Simulator 07SAZ-TB4011A
- SRS Simulator Lead L 070AZ-SNAA300
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 Service and Repair.
- Before doing this troubleshooting procedure, review SRS Precautions and Procedures Service and Repair, General Troubleshooting Information Reading and Clearing Diagnostic Trouble Codes, and Battery Terminal Disconnection and Reconnection Procedures.
- 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 Testing and Inspection, and retest.
1. Clear the DTCs with the HDS.
2. Turn the ignition switch to ON (II), or press the engine start/stop button to select the ON mode, then wait for 10 seconds.
3. Check for DTCs with the HDS.
Is DTC 41-1x indicated?
YES -
Go to step 4.
NO -
Intermittent failure, the system is OK at this time. Go to Troubleshooting Intermittent Failures. If another DTC is indicated, troubleshoot the DTC.
4. Turn the ignition switch to LOCK (0), or press the engine start/stop button to select the OFF mode.
5. Disconnect the negative cable from the battery, then wait at least 3 minutes.
6. Check for these connector connections and harness.
- SRS unit connector A (39P) and the SRS unit.
- Left front impact sensor 2P connector on the left engine compartment wire harness Front Impact Sensor Replacement.
- C302.
Are the connections and harness OK?
YES -
Go to step 7.
NO -
Repair the poor connector connections or replace the harness, then clear the DTC, and retest.
- If poor connector connections are repaired, and DTC 41-1x is still present, go to step 7.
- If the harness is replaced, and DTC 41-1x is still present, replace the SRS unit Service and Repair.
7. Disconnect SRS unit connector A (39P) from the SRS unit.
8. Disconnect the left front impact sensor 2P connector on the left engine compartment wire harness Front Impact Sensor Replacement.
9. Measure the resistance between SRS unit connector A (39P) terminals No. 36 and No. 37. There should be an open circuit or at least 1 MOhms.
Is the resistance as specified?
YES -
Go to step 10.
NO -
Short to another wire in the left engine compartment wire harness or the dashboard wire harness; replace the faulty harness, then clear the DTC.
10. Measure the resistance between body ground and SRS unit connector A (39P) terminals No. 36 and No. 37 individually. There should be an open circuit or at least 1 MOhms.
Is the resistance as specified?
YES -
Go to step 11.
NO -
Short to ground in the dashboard wire harness or the left engine compartment wire harness; replace the faulty harness, then clear the DTC.
11. Reconnect the negative cable to the battery.
12. Turn the ignition switch to ON (II), or press the engine start/stop button to select the ON mode.
13. Measure the voltage between body ground and SRS unit connector A (39P) terminals No. 36 and No. 37 individually. There should be less than 0.2 V.
Is the voltage as specified?
YES -
Go to step 14.
NO -
Short to power in the left engine compartment wire harness or the dashboard wire harness; replace the faulty harness, then clear the DTC.
14. Turn the ignition switch to LOCK (0), or press the engine start/stop button to select the OFF mode.
15. Connect the black terminal (A) of SRS simulator lead L to the SRS inflator simulator (jumper connector), then connect SRS simulator lead L to the left front impact sensor 2P connector (B) on the left engine compartment wire harness.
16. Measure the resistance between SRS unit connector A (39P) terminals No. 36 and No. 37. There should be less than 1.0 Ohms.
Is the resistance as specified?
YES -
Faulty left front impact sensor or SRS unit; replace the left front impact sensor Front Impact Sensor Replacement, then clear the DTC, and retest. If the DTC is still present, replace the SRS unit Service and Repair.
NO -
Open in the left engine compartment wire harness or the dashboard wire harness; replace the faulty harness, then clear the DTC.