지워지지 않는 C1623 통신불량? MDPS 교환 전 필수 시청! '직결 바이패스(Bypass)' 완벽 진단법 🛠️

Have you ever experienced a helpless situation during Hyundai/Kia vehicle diagnostics where the 'C1623 (Steering Angle Sensor Communication Timeout)' code displayed on the HECU cannot be cleared with a scanner, and communication with the MDPS control module is impossible? Many mechanics misdiagnose this symptom as an MDPS module failure and often replace expensive parts. However, the real cause is highly likely not to be the module, but rather a physical 'break' in the joint connector or wiring inside the dashboard. In this video, we thoroughly dissect a highly logical diagnostic process that restores network communication and completely clears fault codes by bypassing the suspicious original vehicle wiring harness and performing a **'Direct Bypass Test'**, which involves directly connecting the MDPS CAN communication line to the communication terminals (pins 6 and 14) of the Interior Diagnostic Connector (OBD-II). Move beyond parts swapping and establish accurate and reliable repair logic! [⏱️ Timeline] 00:00 - Intro: Facing the Unerasable C1623 Mystery Phenomenon (Ongoing Failure) 01:30 - Solidifying Theory: Correlation between Body Stability Control (HECU) and Steering Angle Sensor (SAS) and C-CAN Network Structure 03:15 - Physical Layer Verification: Multimeter Power/Ground Check and CAN Differential Waveform (2.5V Band) Analysis using Oscilloscope 05:00 - 🔥 [Key Highlights] Hypothesis Proof: Direct Bypass Operation on OBD-II Diagnostic Connector (Pins 6, 14) 07:20 - Diagnosis Conclusion: Communication Restoration and C1623 Fault Code Clearance Confirmed! (Process for Confirming Open Wiring Defects) 08:50 - Field Application Precaution 1: Phase verification is essential in the latest Vehicle Gateway (ZGM/ICU) structure 09:40 - Field Application Precaution 2: Limitations of checking for simple open and short circuits 10:30 - Post-repair Processing (Essential): Steering angle sensor zero-point calibration (SAS Learning) and full U-code erasure procedure after repair