Hyundai Sonata LF: Dual Clutch Transmission Control System / Inhibitor Switch Troubleshooting
| Fault Diagnosis |
| Fault Diagnosis for Symptom |
| Major Symptom | Expected Cause | Items to Check and Measures |
| Shift lever not operating Gear not marked on cluster Shock occurs while shifting lever Warning lamp ON Engine OFF while vehicle is parked | Inhibitor switch circuit abnormal Inhibitor switch function abnormal | Check the inspection FLOW and replace the inhibitor switch |
| Inhibitor switch "N" setting faulty | Adjust "N" setting using "N" setting jig (refer to automatic transmission system - "inhibitor switch") | |
| Shift cable separation faulty | Adjust shift cable separation (refer to automatic transmission system - "inhibitor switch") | |
| Poor ground condition on reversing light circuit | Check the ground condition on reversing light and retighten it | |
| Inhibitor switch vehicle side circuit abnormal | Check the connection of junction box power terminal, fuse (TCU2) terminal and replace the junction box or adjust the gap | |
| Check inside the inhibitor switch connector for foreign substance and whether terminal is bent | ||
| Poor ground condition on inhibitor switch wire | Check the ground condition of wire and retighten it | |
| Poor inhibitor unit (disconnection/short-circuit) | Replace inhibitor switch (refer to inhibitor switch inspection) |
Inhibitor Switch Repair procedures
Inspection • Thoroughly check connectors for looseness, poor connection, bending, corrosion, contamination, deterioration, or damage...
Other information:
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Hyundai Sonata LF 2014-2019 Service Manual: CVVT & Camshaft Repair procedures
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