Hyundai Accent (HC): Cruise Control System / 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 (although CC system is normal)Damaged or disconnected bulb of cruise main switch indicator lampRepair the harness or replace the part.
Harness damaged or disconnected

Other information:

Hyundai Accent (HC) (2017 - 2022) Service Manual: Troubleshooting

- Troubleshooting SymptomPossible CauseRemedy One lamp does not light(all exterior)Bulb burned outReplace bulb Socket, wiring or ground faultyRepair if necessary Head lamps do not lightBulb burned outReplace bulb Ignition fuse (LOW:10A, HIGH:20A) blownCheck for short and replace fuse Head lamp fuse (15A) blownCheck for short and replace fuse Head lamp relay faultyCheck relay Lighting switch faultyCheck switch Wiring or ground faultyRepair if necessary Tail lamps and license plate lamp

Hyundai Accent (HC) (2017 - 2022) Service Manual: A/C Pressure Transducer

- Description The A/C Pressure Transducer (APT) converts the pressure value of high pressure line into voltage value after measuring it. By converted voltage value, engine ECU controls the cooling fan by operating it high speed or low speed. Engine ECU stops the operation of the compressor when the temperature of refrigerant line is very high or very low irregularly to optimize air conditioning system.

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