Safety Warning
DIY auto repair can cause serious injury, fire, or vehicle damage. These guides are for informational purposes only. Always follow OEM torque specs, wear PPE, and consult a certified mechanic if you are unsure. You are solely responsible for your safety.
Operation Condition For The ISG function
2017 Kia Rio EX, 4D HatchbackSECTION Operation Condition For The ISG function
- (Auto stop or Auto start condition (If all of the below condition are satisfied)
Items State Remark Driving conditions ISG OFF Switch Off Switch (seat/door/hood) Closed Lever position D or N range Prohibit operation on gear 'P, R' Brake pedal Pressed Auto Stop Released Auto Start Vehicle speed Vehicle speed = 0 Mph After driving higher than 8 kph (5 Mph) Engine Coolant Temperature (ECT) Over 78 °C (172.4 °F) Brake Pressure Below -35 kpa Battery conditions SOC Over 77% To protect Battery Temperature 2 ~ 55 °C (35.6 ~ 131 °F) Steering wheel Operating angle Below 180° Parking condition Slope Up hill <12%, Down hill < 8% ISG related part error Sensor Error Brake Booster Pressure Sensor Brake Master Cylinder Pressure Sensor, Brake Pedal Sensor, APS, Battery Sensor Related System Error TM Electronic Auxiliary Pump ESC System Defect Mode CAN Communication Error Engine Limp Home Mode - (Forced re-start conditions (If any of the below condition is not satisfied)
Component Conditions State Remark Conditions for safety Low pressure for braking system Over -35 kpa Low battery voltage Below 12.1V for 180 sec Active defroster of front glass On When inertial speed reach 1Mph with (down hill) Over 1Mph (Kph) Inertial Speed Open the door or unfasten driver's seat belt Open Brake Pedal Pressed Elapsed much of stop time On the steep slope way Conditions for convenience Turn on the air-conditioner or max blower speed or bad performance of air conditioning and heating Active 'ISG OFF' button Sign of forced auto re-start Blinking of lamp for 5 second and indicating on cluster - Restriction conditions for Auto-Stop operation
* To protect system and safety auto-stop system is restricted below the conditions
Large steering angle when car is stop Low brake operating pressure Turn on the air conditioner with max blower When battery Condition is poor (low SOC) Active defroster of front or rear glass Unfasten driver's seat belt or open the door and hood On the steep slope way With ISG system errors, and other diagnosis - Restriction condition for auto Re-Start operation
Open hood (have to restart by key for repairman's safety)
- Restriction Condition for OBD Check & Emission Control
Auto Stop system will be limited During Canister purge monitoring During OBD check To restrict continuous Cranking (for Emission Control) Start Motor can operate for two seconds at the longest (just once) CAUTION: The ISG system is strongly networked with the power management. In the event of battery replacement, disconnection of the battery terminal or after changing the engine management system, the reference (Ω) data regarding the battery charge state and battery condition can be lost.
They are only available again a closed-circuit current measurement of approximate 4 hours in which the vehicle may not be wakened. In this time, the ISG system is inactive.
RENDER: 1.0x
NO RELATED
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When to See a Mechanic
Stop DIY work and contact a certified mechanic immediately if any of the following apply:
- • You smell fuel, burning insulation, or see smoke.
- • Brakes feel soft, pull hard to one side, or make grinding noises.
- • The engine overheats, stalls repeatedly, or misfires under load.
- • You are missing required tools, torque specs, or safe lifting equipment.
- • You are not confident in the next step or safety outcome.