Kia Optima Hybrid: Cruise Control System / Troubleshooting
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 brake system Check input and output signals at brake system
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 or malfunction of the brake stroke sensor or circuit Repair the harness or replace the brake pedal switch Malfunction of the brake signals or brake system Check input and output signals at HCU or brake system
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 TCU signals Check input and output signals at TCU
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 cluster signals Check input and output signals at cluster
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 cluster signals Check input and output signals at cluster
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 brake system Check input and output signals at brake system
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
System Block Diagram Component Parts And Function Outline Component partFunctionECUControls engine.MCUControls drive motor.ABSSends vehicle speed to HCU.HCUReceives signals from sensor and control switches.Cluster ...
Other information:
Special Service Tools Tool Name / NumberIllustrationDescriptionLower arm ball joint remover0K545-A9100Removal of front lower arm from front axle Personal Protective Equipment NameIllustrationDescriptionInsulation gloveUsed when inspecting or working on the high voltage components[Insulation performance ...
Description This transaxle has a standard Mechanical Oil Pump (MOP) linked to the input shaft to generates oil pressure when input shaft rotates. Being a hybrid, this transaxle also has an Electric Oil Pump (EOP). Because the hybrid features Auto-Stop which starts and stops the engine as needed. The ...
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