45-1x
SRS DTC Troubleshooting: 45-1x
DTC 45-1x ("x" can be 0 thru 9 or A thru F):
No Signal From the Left Side Impact Sensor (second)
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 SRS Unit Update, and retest.
1. Clear the DTCs with the HDS.
2. Turn the ignition switch to ON (II), then wait for 10 seconds.
3. Check for DTCs with the HDS.
Is DTC 45-1x indicated?
YES -
- If DTC 45-11 is indicated, go to step 4.
- If DTC 45-1x except 45-11 is indicated alone, faulty left side impact sensor(second); replace the left side impact sensor (second) Side Impact Sensor (Second) Replacement, then clear the DTC.�
- If DTC 43-11 and 45-11 are 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. 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 the left side impact sensor (first) 4P connector from the left side impact sensor (first) Side Impact Sensor (First) Replacement.
7. Disconnect the left side impact sensor (second) 2P connector (A) from the left side impact sensor (second) Side Impact Sensor (Second) Replacement.
8. Measure the resistance between left side impact sensor (second) 2P connector on the floor wire harness terminals No. 1 and No. 2.
Is there an open circuit or at least 1 MOhms?
YES -
Go to step 9.
NO -
Short to another wire in the floor wire harness between the left side impact sensor (first) and the left side impact sensor (second); replace the floor wire harness, then clear the DTC.�
9. Measure the resistance between body ground and left side impact sensor (second) 2P connector on the floor wire harness terminals No. 1 and No. 2 individually.
Is there an open circuit or at least 1 MOhms?
YES -
Go to step 10.
NO -
Short to ground in the floor wire harness between the left side impact sensor (first) and the left side impact sensor (second); 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 left side impact sensor (second) 2P connector on the floor wire harness terminals No. 1 and No. 2 individually.
Is there less than 0.2 V?
YES -
Go to step 13.
NO -
Short to power in the floor wire harness between the left side impact sensor (first) and the left side impact sensor (second); replace the floor wire harness, then clear the DTC.
13. Turn the ignition switch to LOCK (0).
14. Connect the black terminals (A) of SRS simulator lead L to the SRS inflator simulator (jumper connector), and then connect the SRS simulator lead L to the left side impact sensor (first) 4P connector (B) on the floor wire harness.
15. Measure the resistance between left side impact sensor (second) 2P connector on the floor wire harness terminals No. 1 and No. 2.
Is there less than 1.0 Ohms?
YES -
Faulty left side impact sensor (second) or SRS unit; replace the left side impact sensor (second) Side Impact Sensor (Second) Replacement, then clear the DTC, and retest. If the DTC is still present, replace the SRS unit SRS Unit Replacement. If the DTC is still present; replace the faulty floor wire harness.
NO -
Open in the floor wire harness between the left side impact sensor (first) and the left side impact sensor (second); replace the floor wire harness, then clear the DTC.�