DTC 42-1x
DTC 42-1x (42-10 to 42-19, 42-1A to 42-1F): No Signal from Right Front Impact SensorSpecial 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. If another DTC is indicated, go to the DTC troubleshooting index.
3. Turn the ignition switch OFF. Check the connections between SRS unit connector A (2SF) and the SRS unit, between the right engine compartment wire harness 2P connector and the right front impact sensor, and at connectors C801 and C209.
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. Turn the ignition switch OFF. Disconnect the battery negative cable, and wait for 3 minutes.
5. Disconnect the driver's airbag 4P connector from the cable reel.
6. Disconnect the front passenger's airbag 4P connector from the SRS main harness (A).
7. Disconnect both seat belt tensioner 2P connector(A).
8. Disconnect the right front impact sensor 2P connector (A).
9. Disconnect SRS unit connector A (28P) from the SRS unit.
10. Check resistance between the No.16 and No.28 terminals of SRS unit connector A (28P). Then check resistance between the No.16 terminal and body ground and 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 11.
NO - Go to step 17.
11. Reconnect the battery negative cable.
12. Turn the ignition switch ON (II).
13. Check for voltage between the No.28 terminal of SRS unit connector A (28P) and body ground, and the 16 terminal and body ground. There should be 1 V or less.
Is the voltage as specified?
YES - Go to step 14.
NO - Go to step 19.
14. Turn the ignition switch OFF.
15. Connect the SRS inflator simulator (jumper connector) and the simulator lead H to the right engine compartment wire harness 2P connector (A).
16. Check resistance between the No.16 and No.28 terminals of SRS unit connector A (28P). There should be 1 Ohm or less.
Is the resistance as specified?
YES - Faulty right front impact sensor. Replace the right front impact sensor if the problem is still present, replace the SRS unit.
NO - Go to step 23.
17. Disconnect the SRS main subharness 28P connector C801 (A) from SRS main harness connector C801 (B).
18. Check resistance between the No.16 and No.28 terminals of SRS unit connector A (28P). Then check resistance between the No.16 terminal 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 - Short in or to ground the right engine compartment wire harness or SRS main harness; replace the faulty harness.
NO - Short in or to ground the SRS main subharness; replace the SRS main subharness.
19. Turn the ignition switch OFF.
20. Disconnect the SRS main subharness 28P connector C801 (A) from SRS main harness connector C801 (B).
21. Turn the ignition switch ON (II).
22. Check voltage between the No.28 terminal of SRS unit connector A (28P) and body ground. There should be 1 V or less.
Is the voltage as specified?
YES - Short to power in the right engine compartment wire harness or SRS main harness; replace the faulty harness.
NO - Short to power in the SRS main subharness; replace the SRS main subharness.
23. Disconnect the SRS main subharness 28P connector C801 (A) from SRS main harness connector C801 (B).
24. Check resistance between the No.16 and No.28 terminals of SRS main harness 28P connector. There should be 1 Ohm or less.
Is the resistance as specified?
YES - Faulty SRS main subharness; replace the SRS main subharness.
NO - Faulty right engine compartment wire harness or SRS main harness; replace the faulty harness.