DTC B2-C1
DTC B2-C1: Faulty Power Supply to the Rear Sating 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 B2-C1 indicated?
YES - Go to step 3.
NO - Intermittent failure, system is OK at this time. Go to Troubleshooting Intermittent Failures. Initial Inspection and Diagnostic Overview If another DTC is indicated, go to the DTC Troubleshooting Index. Diagnostic Trouble Code Descriptions
3. Turn the ignition switch OFF. Disconnect the negative cable from the battery, and wait for 3 minutes.
4. Disconnect the left side wire harness 2P connector (A) from the rear safing sensor.
5. Disconnect SRS unit connector C (28P) from the SRS unit.
6. Check resistance between the No. 5 terminal of SRS unit connector C (28P) and body ground. There should be an open circuit or at least 1 KOhm.
Is the resistance as specified?
YES - Go to step 7.
NO - Short to ground in the left side wire harness or right side wire harness; replace the faulty harness.
7. Check resistance between the No. 5 and No. 6 terminals of SRS unit connector C (28P). There should be an open circuit or at least 1 KOhm.
Is the resistance as specified?
YES - Faulty rear sating sensor or SRS unit; replace the rear sating sensor. If the problem is still present, replace the SRS unit.
NO - Short in the left side wire harness or right side wire harness; replace the faulty harness.