DTC 42-Cx
DTC 42-Cx (42-C0 to 42-C9, 42-CA to 42-CF): Faulty Power Supply to the Right Front Impact Sensor1. 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-Cx 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. Disconnect the battery negative cable, and wait for 3 minutes.
4. Disconnect the engine compartment wire harness 2P connector (A) from the right front impact sensor.
5. Disconnect SRS unit connector A (28P) from the SRS unit.
6. Check resistance between the No.28 terminal of SRS unit connector A (28P) and body ground. There should be an open circuit, or at least 1 MOhms.
Is the resistance as specified?
YES - Go to step 7.
NO - Short to ground in the dashboard wire harness or engine compartment wire harness; replace the faulty harness.
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 MOhms.
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 - Short in the dashboard wire harness or engine compartment wire harness; replace the faulty harness.