42-1x

SRS DTC Troubleshooting: 42-1x (x can be 0 thru 9 or A thru F)

DTC 42-1x ("x" can be 0 thru 9 or A thru F):No Signal From the Right Front Impact Sensor

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, Initial Inspection and Diagnostic Overview and Battery Terminal Disconnection and Reconnection. Procedures

1. Clear the DTC memory. Initial Inspection and Diagnostic Overview

2. Turn the ignition switch to ON (II), and check that the SRS indicator comes on for about 6 seconds and then goes off.

Does the SRS indicator stay on, and is DTC 42-1x indicated?
YES - Go to step 3.

NO - Intermittent failure, the system is OK at this time. Go to Troubleshooting Intermittent Failures. Initial Inspection and Diagnostic Overview If another DTC is indicated, troubleshoot the DTC.


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

4. Disconnect the negative cable from the battery, then wait for 3 minutes.

5. Check the connections between SRS unit connector A (28P) and the SRS unit, between the right engine compartment wire harness 2P connector and the right front impact sensor, Locations and at connector C203.

Are the connections OK?
YES - Go to step 6.

NO - Repair the poor connections and retest. If DTC 42-1x is still present, go to step 6.


6. Disconnect the right engine compartment wire harness 2P connector (A) from the right front impact sensor.

7. Disconnect SRS unit connector A (28P) from the SRS unit. Service and Repair






8. Measure the resistance between the terminals No. 16 and No. 28 of SRS unit connector A (28P). There should be an open circuit or at least 1 MOhms.

Is the resistance as specified?
YES - Go to step 9.

NO - Short in the right engine compartment wire harness or dashboard wire harness; replace the faulty harness.






9. Measure the resistance between the terminal No. 16 of SRS unit connector A (28P) and body ground, and between the terminal No. 28 and body ground. 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 dashboard wire harness or the right engine compartment wire harness; replace the faulty harness.






10. Reconnect the negative cable to the battery.

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

12. Measure the voltage between the terminal No. 16 of SRS unit connector A (28P) and body ground, and between the terminal No. 28 and body ground. There should be less than 0.2 V.

Is the voltage as specified?
YES - Go to step 13.

NO - Short to power in the right engine compartment wire harness or dashboard wire harness; replace the faulty harness.






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

14. Connect the SRS inflator simulator (jumper connector) and the black lead (A) of simulator lead L to the right engine compartment wire harness 2P connector (B).






15. Measure the resistance between the terminals No. 16 and No. 28 of SRS unit connector A (28P). There should be less than 1.0 Ohms.

Is the resistance as specified?
YES - Faulty right front impact sensor or SRS unit; replace the right front impact sensor. Front Impact Sensor Replacement If the problem is still present, replace the SRS unit. SRS Unit Replacement

NO - Poor connection at C203, open in right engine compartment wire harness, or open in dashboard wire harness. Inspect C203. If it is OK, replace the faulty harness.