43-1x

SRS DTC Troubleshooting: 43-1x

DTC 43-1x ("x" can be 0 thru 9 or A thru F):

No Signal From the Left Side Impact Sensor (first)

Special Tools Required

- SRS Inflator Simulator 07SAZ-TB4011A
- SRS Simulator Lead L 070AZ-SNAA300

NOTE: 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.

1. Clear the DTCs with HDS Reading and Clearing Diagnostic Trouble Codes.

2. Turn the ignition switch to ON (II), and wait for 10 seconds.

3. Check for DTCs with the HDS Reading and Clearing Diagnostic Trouble Codes.

Is DTC 43-1x indicated?

YES -

- If DTC 43-11 is indicated, go to step 4.
- If DTC 43-1x except 43-11 is indicated alone, or DTC 43-11 and 45-11 is indicated, faulty left side impact sensor (first); replace the left side impact sensor (first) Side Impact Sensor (First) Replacement, then clear the DTC.�

NO -

Intermittent failure, the system is OK at this time. Go to Troubleshooting Intermittent Failures Reading and Clearing Diagnostic Trouble Codes. If another DTC is indicated, troubleshoot the DTC.�

4. Turn the ignition switch to LOCK (0).

5. Disconnect the negative cable from the battery, then wait at least 3 minutes.

6. Disconnect SRS unit connector B (28P) from the SRS unit Service and Repair.

7. Disconnect the floor wire harness 4P connector (A) from the left side impact sensor (first) Side Impact Sensor (First) Replacement.






8. Measure the resistance between SRS unit connector B (28P) terminals No. 25 and No. 26. There should be an open circuit or at least 1 MOhms.





Is the resistance as specified?

YES -

Go to step 9.

NO -

Short to another wire in the floor wire harness; replace the floor wire harness, then clear the DTC.�

9. Measure the resistance between body ground and SRS unit connector B (28P) terminals No. 25 and No. 26, individually. There should be an open circuit or at least 1 MOhms.





Is the resistance as specified?

YES -

Go to step 10.

NO -

Short to ground in the floor wire harness; replace the floor wire harness, then clear the DTC.�

10. Reconnect the negative cable to the battery.

11. Turn the ignition switch to ON (II).

12. Measure the voltage between body ground and SRS unit connector B (28P) terminals No. 25 and No. 26, individually. There should be less than 0.2 V.





Is the voltage as specified?

YES -

Go to step 13.

NO -

Short to power in the floor wire harness; replace the floor wire harness, then clear the DTC.�

13. Turn the ignition switch to LOCK (0).

14. Connect the black terminal of SRS simulator lead L (A) to the SRS inflator simulator (jumper connector), and then connect the simulator lead L to the left side impact sensor 4P connector (B).






15. Measure the resistance between SRS unit connector B (28P) terminals No. 25 and No. 26. There should be less than 1.0 Ohms.





Is the resistance as specified?

YES -

Faulty left side impact sensor (first) or SRS unit; replace the left side impact sensor (first) Side Impact Sensor (First) Replacement, then clear the DTC, and retest. If the DTC is still present, replace the SRS unit SRS Unit Replacement.�

NO -

Open in the floor wire harness; replace the floor wire harness, then clear the DTC.�