DTC 42-1x

DTC 42-1x (42-10 to 42-19,42-1A to 42-1F): No Signal from the Right Front Impact Sensor

Special Tools Required
- SRS inflator simulator 07SAZ-TB4011A
- SRS simulator lead H 07YAZ-S3AA100

1. Erase the DTC memory.
2. Turn the ignition switch 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, system is OK at this time. Go to Troubleshooting Intermittent Failures. Initial Inspection and Diagnostic OverviewIf another DTC is indicated, go to the DTC Troubleshooting Index. Diagnostic Trouble Code Descriptions

3. Turn the ignition switch OFF. Check the connections between SRS unit connector A (28P) and the SRS unit, between the engine compartment wire harness 2P connector and the right front impact sensor, and at connector C403.

Are the connections OK?

YES - Go to step 4.

NO - Repair the poor connections and retest. If DTC 42-1x is still present, go to step 4.

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




5. Disconnect the engine compartment wire harness 2P connector (A) from the right front impact sensor.
6. Disconnect SRS unit connector A (28P) from the SRS unit.




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

Is the resistance as specified?

YES - Go to step 8.

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




8. Check resistance between the No. 16 terminal of SRS unit connector A (28P) and body ground, and between the No. 28 terminal and body ground. There should be an open circuit or at least 1 MOhm.

Is the resistance as specified?

YES - Go to step 9.

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

9. Reconnect the battery negative cable.
10. Turn the ignition switch ON (II).




11. Check for voltage between the No. 16 terminal of SRS unit connector A (28P) and body ground, and between the No. 28 terminal and body ground. There should be 1 V or less.

Is the voltage as specified?

YES - Go to step 12.

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

12. Turn the ignition switch OFF.




13. Connect the SRS inflator simulator (jumper connector) and the simulator lead to the engine compartment wire harness 2P connector (A).




14. Check resistance between the No. 16 and No. 28 terminals of SRS unit connector A (28P). There should be 0 - 1.0 Ohm.

Is the resistance as specified?

YES - Faulty right front impact sensor or SRS unit; replace the right front impact sensor. If the problem is still present, replace the SRS unit.

NO - Poor connection at C403, faulty engine compartment wire harness, or faulty dashboard wire harness. Inspect C403. If it is OK, replace the faulty harness.