Idle Stop & Go (Isg) System - 2.0L: Overview Kia Soul I рестайлинг

Description

Idle Stop & Go (ISG) function automatically switches off the engine when the car is at a standstill if the and starts it again as soon as the brake pedal is released. This not only reduces fuel consumption, it also lowers emissions. Idle Stop & Go (ISG) function also has a built-in sensitivity to driving safety and comfort.

The engine is not switched off if certain conditions relating to safety and comfort have not been fulfilled (For example, when the engine oil is still cold, when the battery is running low or when the outside temperature is below 3°C). It can be deactivated by pressing the ISG OFF switch on the crash pad lower panel.

Sample scenario: switching off the engine at a standstill at a red traffic light or in stop-and-go traffic.

How to use

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1. Engine Auto-Stop: D-range + brake pedal is pressed.
2. Engine Auto-Start: Brake pedal is released. N-range + brake pedal is pressed.

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1. Vehicle moving.
2. The transmission lever position is D-range. The brake pedal is released.
3. The engine is running. (Vehicle moving).
4. The driver brakes until the vehicle comes to a standstill.
5. The transmission lever position is D-range. The brake pedal is pressed
6. The engine stops. The symbol "AUTO STOP" lights up in the instrument cluster.
7. The driver wants to continue the journey.
8. The transmission lever position is D-range. The brake pedal is released.
9. The engine is running again. The symbol goes out.

Operation Condition for the ISG function

1. 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 8kph (5 Mph) Air conditioning system Ambient temperature is between -2 ~ 35 °C (28.4 ~ 95 °F) Engine Coolant Temperature (ECT) Over 78 °C (172.4 °F) Brake Pressure Below -35kpa 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
2. 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 -35kpa 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
3. 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
4. Restriction condition for auto Re-Start operation Open hood (have to restart by key for repairman's safety)
5. 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 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. CAUTION: ISG system deactivation by fault. Fault in communication line (LIN/CAN) Fault Electric oil pump Fault ESC System Fault Limp home mode Fault brake booster vacuum pressure sensor Fault Brake master cylinder pressure sensor Fault Brake pedal switch Fault Battery sensor When the ISG related sensors or system error occurs, the ISG OFF switch lights up. Especially when the battery sensor is replaced or reinstalled, the vehicle must be placed in the ignition switch OFF for about 4 hours for recalibration. The ISG function is operated about 4 hours later normally. But in the case of first 25 times, the ISG function can be operated regardless of recalibration. WARNING: When the engine is in Idle stop mode, it's possible to restart the engine without the driver taking any action. Before leaving the car or doing anything in the engine room area, stop the engine by turning the ignition key to the LOCK position or removing it.

Vehicles have many control units that use more electricity. These units control their own system based on information from diverse sensors. It is important to have a stable power supply as there diverse sensors giving a variety of information. Battery sensor is mounted on battery (-) terminal. It transmits battery voltage, current, temperature information to ECM. ECM controls generating voltage by duty cycle based on these signals.

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Note. It takes a few hours for a new battery sensor to detect the battery state correctly. Perform the following process after replacing the battery sensor. Ignition switch ON/OFF. Park the vehicle about 4 hours. After 4 hours later, check that the SOC (State of charge) of battery is displayed on GDS properly. After engine start ON/OFF 2 times or more, check the SOF (State of function) of battery using GDS.

Note. Refer to DTC manual code " U1111 BATTERY SENSOR FAULT DETECTED BY ECU , U1112 LIN COMMUNICATION ERROR " to inspect the battery sensor. Must replace the engine wiring assembly to replace the battery sensor. Battery sensor doesn't be replaced as a part only.

In order to ensure adequate brake power assistance in every situation, the brake booster is equipped with a partial vacuum sensor. The brake booster vacuum pressure sensor is located beside the brake booster.

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1. Check installation status of BBVPS and Vacuum hose or damage of vacuum hose.
2. Connect GDS to DLC (Data Link Cable).
3. Warm up the engine to normal operating temperature.
4. Monitor "BBVPS" parameter on GDS. NOTE: With a brake partial vacuum that is too low, the ISG function also starts without activity on the part of the driver. Insufficient brake partial vacuum can lead to safety risks during braking maneuvers, when rolling on an incline. To prevent this, the engine is started. (Refer to "DTC «P0557 BRAKE BOOSTER PRESSURE SENSOR CIRCUIT LOW»(ref-537225-S23127139042013032200000) , «P0558 BRAKE BOOSTER PRESSURE SENSOR CIRCUIT HIGH»(ref-537225-S16919184912013032200000) " in DTC manual)

AGM battery is used for especially heavy load on the vehicle network depending on equipment and requirements. AGM stands for Absorbent Glass Material Battery; that is absorbent glass fibre fleece. AGM batteries are fitted in models with electrical loads/consumers which have a high energy demand.

The constantly increasing energy demand of modern vehicle electrical systems calls for ever more powerful battery solutions.

The power consumption is considerable even when the vehicle is parked.

The somewhat higher price compared with a battery of similar size is fully balanced by the following benefits

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1. Significantly longer service life
2. Increased starting reliability at low temperatures
3. 100 % freedom from maintenance
4. Low risk in event of an accident (reduced risk to the environment)

Due to the considerably more frequent occurrence of starting operations, the electrical load that occurs often leads to voltage dips in the vehicle network. In order to stabilize the power supply for certain voltage-sensitive electrical components, a DC/DC converter is used in conjunction with the ISG function.

The DC DC converter supplies the relay with a voltage that also remains constant during the starting operation.

The DC/DC converter is fitted at the behind of the glove box and luggage side trim RH.

Via the test leads for input voltage and the start relay, the electronics decide whether the power is supplied to the output via the bypass or the DC/DC converter.

In the bypass mode, the on-board supply voltage is not fed across the DC/DC converter, rather is transferred directly to the outputs. In the booster phase, the vehicle voltage is adapted.

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Note. In the ISG mode, if the power of an audio system turnsOFF by drawdown while "Auto Starting" or "Idle Starting" function operates, replace the DC/DC converter.

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1. Disconnect the battery negative terminal.
2. Remove the glove box housing. (Refer to " «CRASH PAD»(ref-537227-S36224571332013032200000) " in BD group)
3. Disconnect the connector (A) and then remove the DC/DC converter (B). NOTE: After disconnecting then reconnecting the battery negative cable, the ISG function dose not operates until the system is stabilized, about 4 hours.

Scheme 184

1. Disconnect the battery negative terminal.
2. Remove the rear seat (Refer to " «REAR SEAT»(ref-537223-S26496345532013032200000) " in BD group).
3. Remove the luggage side trim RH (Refer to " «INTERIOR TRIM»(ref-537227-S30621835772013032200000) " in BD group).
4. Disconnect the connector (A) and then remove the DC/DC converter (B). NOTE: After disconnecting then reconnecting the battery negative cable, the ISG function dose not operates until the system is stabilized, about 4 hours.

The ISG OFF switch on the crash pad lower panel can be used to deactivate the ISG function.

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1. Remove the crash pad side switch assembly (A) from the switch panel on the crash pad of the driver's side.
2. Disconnect the ISG OFF switch connector (A).
3. Check the continuity between the switch 1 and 4 terminals as the ISG OFF switch is engaged.

The charging system included a battery, an alternator with a built-in regulator, and the charging indicator light and wire.

The Alternator has eight built-in diodes, each rectifying AC current to DC current.

Therefore, DC current appears at alternator "B" terminal.

In addition, the charging voltage of this alternator is regulated by the battery voltage detection system.

The alternator is regulated by the battery voltage detection system. The main components of the alternator are the rotor, stator, rectifier, capacitor brushes, bearings and OAD (Overrunning Alternator Decoupler) pulley. The brush holder contains a built-in electronic voltage regulator.

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The starting system includes the battery, starter, solenoid switch, inhibitor switch (A/T), ignition switch, ignition lock switch, connection wires and the battery cable.

When the ignition key is turned to the start position, current flows and energizes the starter motor's solenoid coil.

The solenoid plunger and clutch shift lever are activated, and the clutch pinion engages the ring gear.

The contacts close and the starter motor cranks. In order to prevent damage caused by excessive rotation of the starter armature when the engine starts, the clutch pinion gear overruns.

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In conjunction with the ISG function, the starter motor must do a great deal more work. The starter motor is therefore configured for a significantly higher number of start cycles. The components of the starter motor have been adapted to the higher requirements.

Note. There are two kinds of starter, ISG type starter and the other. When replace the starter, confirm that the part number and connector shape.

This transaxle has a standard Mechanical Oil Pump (MOP) linked to the input shaft to generates oil pressure when input shaft rotates.

But, this transaxle equipped with ISG system also has an Electric Oil Pump (EOP). Because the ISG system features Auto-Stop which starts and stops the engine as needed. The Auto-Stop feature prevents the Mechanical Oil Pump (MOP) from operating and building enough pressure for the transaxle to operate. When the vehicle comes to a stop with the engine off, Mechanical Oil Pump (MOP) cannot generate sufficient oil pressure during the initial startup or during low speed driving. For these reasons, the Electric Oil Pump (EOP) takes on this role as an additional device that can generate the required oil pressure when the vehicle comes to a stop or during low speed driving. The Electric Oil Pump (EOP) supplies oil pressure to the Under Drive Brake (UD/B).

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1. Disconnect the negative (-) battery terminal.
2. Disconnect the Electric Oil Pump (EOP) connector (A).
3. Remove the under cover (A) after lifting the vehicle with lift. Tightening torque: 6.9 ~ 10.8 N.m (0.7 ~ 1.1 kgf.m, 5.1 ~ 8.0 lb-ft)
4. Remove the Electric Oil Pump (B) after removing the bolts (A-4ea). Tightening torque: 19.6 ~ 25.5 N.m (2.0 ~ 2.6 kgf.m, 14.4 ~ 18.8 lb-ft)

The present brake switch is used as an input variable for the ISG function to detect brake operation.

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1. Connect a circuit tester to the connector of stop lamp switch, and check whether or not there is continuity when the plunger of the stop lamp switch is pushed in and when it is released.
2. The stop lamp switch is in good condition if there is no continuity when plunger (A) is pushed.

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1. Turn ignition switch OFF.
2. Remove the crash pad lower panel. (Refer to the " «CRASH PAD»(ref-537227-S36224571332013032200000) ")
3. Disconnect the stop lamp switch connector (A).

Via the seat belt/Door switch, the ISG function can detect that the driver has fastened the seat belt/door. If the driver has not fastened the seat belt/door, the ISG function reacts as follows. If the seat belt or door is opened, the engine must not be started or stopped by the ISG function for safety reasons.

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1. Remove the door switch and check for continuity between the terminals.

Scheme 200

1. Remove the door switch (A) after loosening the bolt.

Via the seat belt/Door switch, the ISG function can detect that the driver has fastened the seat belt/door. If the driver has not fastened the seat belt/door, the ISG function reacts as follows. If the seat belt or door is opened, the engine must not be started or stopped by the ISG function for safety reasons.

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1. Remove the connector from the switch.
2. Check for continuity between terminals. Seat belt condition Continuity Fastened Non-conductive (infinityohms) Not fastened Conductive (ohms)

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1. Remove the front seat.
2. After loosening the mounting bolt, then remove the front seat belt buckle (A).

The hood switch is included as the influencing factors in the calculation of the ISG function. If the hood is open, the engine must not be started or stopped by the ISG function for safety reasons.

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1. Disconnect the hood switch connector (A).
2. Check for continuity between terminals

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1. After loosening the mounting bolts and connector (A), then remove the hood switch (B).