Hyundai Tucson Owners & Service Manuals

Hyundai Tucson: Cruise Control System (CC) / Troubleshooting

- Trouble Symptom Charts

Trouble Symptom 1

Trouble Symptom 2

Trouble symptomProbable causeRemedy
The set vehicle speed varies greatly upward or downward
"Surging" (repeated alternating acceleration and deceleration) occurs after setting
Malfunction of the vehicle speed sensor circuitRepair the vehicle speed sensor system, or replace the part
Malfunction of ECMCheck input and output signals at ECM

Trouble Symptom 3

Trouble symptomProbable causeRemedy
The CC system is not canceled when the brake pedal is depressedDamaged or disconnected wiring of the brake pedal switchRepair the harness or replace the brake pedal switch
Malfunction of the ECM signalsCheck input and output signals at ECM

Trouble Symptom 4

Trouble symptomProbable causeRemedy
The CC system is not canceled when the shift lever is moved to the "N" position (It is canceled, however, when the brake pedal is depressed)Damaged or disconnected wiring of inhibitor switch input circuitRepair the harness or repair or replace the inhibitor switch
Improper adjustment of inhibitor switch
Malfunction of the ECM signalsCheck input and output signals at ECM

Trouble Symptom 5

Trouble symptomProbable causeRemedy
Cannot decelerate (coast) by using the "SET/–" switchTemporary damaged or disconnected wiring of "SET/–" switch input circuitRepair the harness or replace the "SET/–" switch
Malfunction of the ECM signalsCheck input and output signals at ECM

Trouble Symptom 6

Trouble symptomProbable causeRemedy
Cannot accelerate or resume speed by using the "RES/+" switchDamaged or disconnected wiring, or short circuit, or "RES/+" switch input circuitRepair the harness or replace the "RES/+" switch
Malfunction of the ECM signalsCheck input and output signals at ECM

Trouble Symptom 7

Trouble symptomProbable causeRemedy
CC system can be set while driving at a vehicle speed of less than 40km/h (25mph), or there is no automatic cancellation at that speedMalfunction of the vehicle-speed sensor circuitRepair the vehicle speed sensor system, or replace the part
Malfunction of the ECM signalsCheck input and output signals at ECM

Trouble Symptom 8

Trouble symptomProbable causeRemedy
The cruise main switch indicator lamp does not illuminate (But CC system is normal)Damaged or disconnected bulb of cruise main switch indicator lampRepair the harness or replace the part.
Harness damaged or disconnected

    Description and Operation
    - Description The cruise control system is engaged by the cruise "ON/OFF" main switch located on right of steering wheel column. The system has the capability to cruise, coast, accelerate and r ...

    Schematic Diagrams
    - System Block Diagram Component Parts And Function Outline Component partFunction Vehicle-speed sensor, ESP/ABS Control ModuleConverts vehicle speed to pulse. ECMReceives signals from sensor ...

    Other information:

    Hyundai Tucson (NX4) 2022-2025 Service Manual: Line Pressure Control Solenoid Valve (LINE_VFS)
    - Description • Line pressure solenoid valve is a Variable Force Solenoid (VFS) type. • When TCM supplies variable current to solenoid valve, hydraulic pressure is controlled indirectly by solenoid valve. - Components Location 1. 28 Brake control solenoid valve (28/B_VFS)2. 46 C ...

    Hyundai Tucson (NX4) 2022-2025 Owner's Manual: Rear Cross-Traffic Collision-Avoidance Assist (RCCA)
    Rear Cross-Traffic Collision-Avoidance Assist uses the rear corner radars to help detect vehicles approaching from the left or right while your vehicle is reversing, and to warn you that a collision is imminent with a warning message and an audible warning. Braking may also be assisted ...

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