Hyundai Tucson: Automatic Transaxle 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 Schematic Diagrams
Circuit Diagram ...

Inhibitor Switch Repair procedures
Inspection     • Thoroughly check connectors for looseness, poor connection, bending, corrosion, contamination, deterioration, or damage. Inspection flow Items to ch ...

Other information:

Hyundai Tucson (NX4) 2022-2023 Owner's Manual: Electrochromic mirror with Homelink System
Your vehicle may be equipped with a Gentex Automatic-Dimming Mirror with an Integrated HomeLink® Wireless Control System. During nighttime driving, this feature automatically detects and reduces the rearview mirror’s glare. The HomeLink® Universal Transceiver allows you to activat ...

Hyundai Tucson (NX4) 2022-2023 Owner's Manual: Blind-Spot Collision-Avoidance Assist Settings
Blind-Spot Safety With the ignition switch ON, go to User Settings > Driver Assistance > Blind- Spot Safety (for cluster type) or Setup > Vehicle > Driver Assistance > Blind-Spot Safety (for infotainment system type) from the Settings menu to select the following: I ...

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