| TUCSON(LM) >2012 > G 2.4 DOHC > Engine Electrical System > Cruise Control System>Troubleshooting |

Trouble Symptom Charts
Trouble Symptom 1
Trouble Symptom 2
Trouble symptom | Probable cause | Remedy
The set vehicle speed varies greatly upward or downward "Surging" (repeated alternating acceleration and deceleration) occurs after setting | Malfunction of the vehicle speed sensor circuit | Repair the vehicle speed sensor system, or replace the part
Malfunction of ECM | Check input and output signals at ECM
Trouble Symptom 3
Trouble symptom | Probable cause | Remedy
The CC system is not canceled when the brake pedal is depressed | Damaged or disconnected wiring of the brake pedal switch | Repair the harness or replace the brake pedal switch
Malfunction of the ECM signals | Check input and output signals at ECM
Trouble Symptom 4
Trouble symptom | Probable cause | Remedy
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 circuit | Repair the harness or repair or replace the inhibitor switch
Improper adjustment of inhibitor switch
Malfunction of the ECM signals | Check input and output signals at ECM
Trouble Symptom 5
Trouble symptom | Probable cause | Remedy
Cannot decelerate (coast) by using the "SET/–" switch | Temporary damaged or disconnected wiring of "SET/–" switch input circuit | Repair the harness or replace the "SET/–" switch
Malfunction of the ECM signals | Check input and output signals at ECM
Trouble Symptom 6
Trouble symptom | Probable cause | Remedy
Cannot accelerate or resume speed by using the "RES/+" switch | Damaged or disconnected wiring, or short circuit, or "RES/+" switch input circuit | Repair the harness or replace the "RES/+" switch
Malfunction of the ECM signals | Check input and output signals at ECM
Trouble Symptom 7
Trouble symptom | Probable cause | Remedy
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 speed | Malfunction of the vehicle-speed sensor circuit | Repair the vehicle speed sensor system, or replace the part
Malfunction of the ECM signals | Check input and output signals at ECM
Trouble Symptom 8
Trouble symptom | Probable cause | Remedy
The cruise main switch indicator lamp does not illuminate (But CC system is normal) | Damaged or disconnected bulb of cruise main switch indicator lamp | Repair the harness or replace the part.
Harness damaged or disconnected