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Some vehicles may experience one or more of the following symptoms in connection with a malfunction related to the C-15 connector. à ̄‚· The driver side power window does not operate. à ̄‚· The door does not open when using the advanced keyless system. à ̄‚· The warning lamp stays ON even after the ignition switch is turned OFF. à ̄‚· DTC B10E7:17 (START STOP UNIT, IG1 Relay Circuit Malfunction) and DTCs related to communication errors may be stored in PCM memory. à ̄‚· Engine no start due to battery discharge. à ̄‚· Clicking sound from throttle body.The symptoms listed above may be caused by corrosion of the C-15 connector terminals due to water intrusion through the front door. In low ambient temperatures, the door harness hardens. If the door is fully opened, it may create a gap between the door and the door harness grommet, which may allow water to enter through the gap.