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. Diagnostic Strategies If another DTC is indicated, go to the DTC troubleshooting index. DTC List - Supplemental Restraint System
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 MOhm.
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 MOhm.
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.