Hyundai Kona: ISG (Idle Stop & Go) System / AGM Battery Repair procedures

Hyundai Kona (OS) 2018-2024 Service Manual / Engine Control / Fuel System / ISG (Idle Stop & Go) System / AGM Battery Repair procedures

Removal

1.	Turn the ignition switch OFF.

2.	Remove the air duct. (Refer to Engine Mechanical System - "Air Cleaner")

Disconnect the battery (-) terminal (A).

Battery (-) terminal mountingnuts :

7.8 - 9.8 N.m (0.8 - 1.0 kgf.m, 5.8 - 7.2 lb-ft)

Disconnect the battery positive (+) terminal (A).

Battery positive (+) terminal tightening nut :

7.8 - 9.8 N.m (0.8 - 1.0 kgf.m, 5.8 - 7.2 lb-ft)

5.	Remove the battery bracket (A).

Remove the battery insulation pad (B) and then remove the battery (C).

Battery bracket mounting bolt :

7.8 - 11.8 N.m (0.8 - 1.2 kgf.m, 5.8 - 8.7 lb-ft)

Inspection

Battery Voltage and Status

Check the battery voltage and status using the battery tester.

Battery Terminal

1.	Move back and forth to check that the battery terminals (A) are loose or corroded.If the terminals are corroded, clean them. If battery positive connection is loose, disconnect ground (GND) cable first before attempting to remove or tighten plus connection, to prevent personal injury.

If the battery clamp on battery positive (+) terminal is not seated securely :

(1)	Turn ignition switch OFF and disconnect the battery negative (-) terminal.

(2)

Tighten battery clamp (A) on battery positive (+) terminal

Battery positive (+) terminal :

7.8 - 9.8 N.m (0.8 - 1.0 kgf.m, 5.8 - 7.2 lb-ft)

If the battery clamp on battery negative (-) terminal is not seated securely :

(1)

Tighten battery clamp (A) on battery negative (-) terminal.

Battery negative (-) terminal :

4.0 - 6.0 N.m (0.4 - 0.6 kgf.m, 3.0 - 4.4 lb-ft)

Battery Condition

Check the battery for damage or deformation. If severe damage, deformation or leakage is found, replace the battery.

Vehicle parasitic current inspection

[Using the Ammeter]

1.	Turn the all electric devices OFF, and then turn the ignition switch OFF.

Close all doors except the engine hood, and then lock all doors.

(1)	Disconnect the hood switch connector.

(2)	Close the trunk lid.

(3)	Close the doors or remove the door switches.

Wait a few minutes until the vehicle's electrical systems go to sleep mode.

•	For an accurate measurement of a vehicle parasitic current, all electrical systems should go to sleep mode. (It takes at least one hour or at most one day.) However, an approximate vehicle parasitic current can be measured after 10-20 minutes.

Connect an ammeter in series between the battery (-) terminal and the ground cable, and then disconnect the clamp from the battery (-) terminal slowly.

•

Be careful that the lead wires of an ammeter do not come off from the battery (-) terminal and the ground cable to prevent the battery from being reset. In case the battery is reset, connect the battery cable again, and then start the engine or turn the ignition switch ON for more than 10 sec. Repeat the procedure from No. 1.

To prevent the battery from being reset during the inspection,

1)	Connect a jump cable between the battery (-) terminal and the ground cable.

2)	Disconnect the ground cable from the battery (-) terminal.

3)	Connect an ammeter between the battery (-) terminal and the ground cable.

4)	After disconnecting the jump cable, read the current value of the ammeter.

Read the current value of the ammeter.

•	If the parasitic current is over the limit value, search for abnormal circuit by removing a fuse one by one and checking the parasitic current.

•	Reconnect the suspected parasitic currentdraw circuit fuse only and search for suspectedunit by removing the component connected with thecircuit one by one until the parasitic draw dropsbelow limit value.

Limit value (after 10 - 20 min.) : Below 50 mA

[Using the Clamp type Ammeter]

6.	Turn the all electric devices OFF, and then turn the ignition switch OFF.

Close all doors except the engine hood, and then lock all doors.

(1)	Disconnect the hood switch connector.

(2)	Close the trunk lid.

(3)	Close the doors or remove the door switches.

Wait a few minutes until the vehicle's electrical systems go to sleep mode.

•	For an accurate measurement of a vehicle parasitic current, all electrical systems should go to sleep mode. (It takes at least one hour or at most one day.) However, an approximate vehicle parasitic current can be measured after 10-20 minutes.

9.	Install the clamp type ammerter on battery negative (-) terminal.

10.

Read the current value of the ammeter.

•	If the parasitic current is over the limit value, search for abnormal circuit by removing a fuse one by one and checking the parasitic current.

•	Reconnect the suspected parasitic currentdraw circuit fuse only and search for suspectedunit by removing the component connected with thecircuit one by one until the parasitic draw dropsbelow limit value.

Limit value (after 10 - 20 min.) : Below 50 mA

The Micro 570 Analyzer

The Micro 570 Analyzer provides the ability to test the charging and starting systems, including the battery, starter and alternator.

※ Because of the possibility of personal injury, always use extreme caution and appropriate eye protection when working with batteries.

※ When charging battery by test result, Battery must be fully charged.

To get accurate test result, battery surface voltage must have subsided ahead before test when you test battery after charged. (See following Battery Test Results)

Keypad

The Micro 570 button on the key pad provide the following functions :

Battery Test Procedure

Connect the tester to the battery.

–	Red clamp to battery positive (+) terminal.

–	Black clamp to battery negative (-) terminal.

•	Connect clamps securely. If "CHECK CONNECTION" message is displayed on the screen, reconnect clamps securely.

2.	The tester will ask if the battery is connected "IN-VEHICLE" or "OUT-OF-VEHICLE". Make your selection by pressing the arrow buttons; then press ENTER.

Select CCA and press the ENTER button.

•	CCA : Cold cranking amps, is an SAE specification for cranking batteried at -0.4°F (-18°C).

Set the CCA value displayed on the screen to the CCA value marked on the battery label by pressing up and down buttons and press ENTER.

•	The battery ratings (CCA) displayed on the tester must be identical to the ratings marked on battery label.

5.	The tester will conduct battery test.

The tester displays battery test results including voltage and battery ratings.

Refer to the following table and take the appropriate action as recommended by the Micro 570.

Battery Test Results

Result On Printer

Remedy

GOOD BATTERY

No action is required.

GOOD RECHARGE

Battery is in a good state.
Recharge the battery and use.
※ You have to follow instruction below when you charge battery and retest, otherwise test result can be inaccurate. (See 'Charge and Retest method after battery charge' below.)

CHARGE & RETEST

Battery is not charged properly.

–	Charge and test the battery again.

※ You have to follow instruction below when you charge battery and retest, otherwise test result can be inaccurate. (See 'Charge and Retest method after battery charge' below.)

REPLACE BATTERY

Replace battery and recheck the charging system.

–	Improper connection between battery and vehicle cables may cause "REPLACE BATTERY". Retest the battery after removing cables and connecting the tester to the battery terminal directly prior to replacing the battery.

BAD CELL-REPLACE

Charge and retest the battery.

–	If the Micro 570 recommends "REPLACE BATTERY", replace the battery and recheck the charging system.

[Charge and Retest method after battery charge]

Battery charge

Set battery charger to 'Auto Mode' (The Mode that charging current drops as the battery charges.) and charge battery until charging current down close to zero or the charger alerts you with an alarm when charge is complete.

(Minimum charging time recommended : More than 3 hours with Auto Mode that explained above)

•

If battery is not fully charged, battery surface voltage will be high while the amount of current charged (CCA) in battery is low. If you measure the battery under this condition, tester may misjudge that battery sulfation occurred because the amount of current in battery is too low in comparison with battery voltage.

* Surface voltage : When battery is charged electrolyte temperature increases and chemical reaction become active resulting in an excessive increase of battery voltage.

It is known that it takes approximate one day to subside this increased surface voltage completely.

Battery Test after charge

Do not test battery right after the charge. Test battery after battery surface voltage has subsided as instructed in the following procedure.

(1)	When battery charge is complete, install the battery in the vehicle.

(2)	Put IG key to ON position and turn on head lamp with low beam, and wait 5 minutes. (Discharge for 5 minutes)

(3)	Turn off the head lamp and IG key, and wait 5 minutes. (Waiting for 5 minutes)

(4)	Remove +, - cable from the battery and test battery.

•	Whenever filing a claim for battery, the print out of the battery test results must be attached.

Starter Test Procedure

7.	After the battery test, press ENTER immediately for the starter test.

8.	Start the engine.

Cranking voltage and starter test results will be displayed on the screen.

Refer to the following table and take the appropriate action as recommended by the Micro 570.

Starter Test Results

Result On Printer

Remedy

CRANKING VOLTAGE NORMAL

System shows a normal starter draw.

CRANKING VOLTAGE LOW

Cranking voltage is lower than normal level.

–	Check starter.

CHARGE BATTERY

The state of battery charge is too low to test.

–	Charge the battery and retest.

REPLACE BATTERY

Replace battery.

–	If the vehicle is not started though the battery condition of "GOOD BATTERY" is displayed, check wiring for open circuit, battery cable connection, starter and repair or replace as necessary.

–	If the engine does crank, check fuel system.

•	When testing the vehicle with old diesel engines, the test result will not be favorable if the glow plug is not heated. Conduct the test after warming up the engine for 5 minutes.

Charging System Test Procedure

10.	Press ENTER to begin charging system test.

11.	The tester displays the actual voltage of alternator. Press ENTER to continue.

12.	Turn off all electrical load and rev engine for 5 seconds with pressing the accelerator pedal. (Follow the instructions on the screen)

13.	The message that engine RPM is detected will be displayed on the screen. Press ENTER to continue.

14.	If the engine RPM is not detected, press ENTER after revving engine.

15.	The tester will conduct charging system test during loads off.

16.	Turn on electrical loads (air conditioner, lamps, audio and etc). Press ENTER to continue.

17.	The tester will conduct charging system test during loads on.

18.	Rev engine for 5 seconds with pressing the accelerator pedal. (Follow the instructions on the screen)

19.	The message that engine RPM is detected will be displayed on the screen. Press ENTER to continue.

20.	If the engine RPM is not detected, press ENTER after revving engine.

21.	Turn off electrical loads (air conditioner, lamps, audio and etc). Turn the engine off.

22.

Charging voltage and charging system test results will be displayed on the screen.

Shut off engine end disconnect the tester clamps from the battery. Refer to the following table and take the appropriate action as recommended by the Micro 570.

Charging System Test Results

Result On Printer

Remedy

CHARGING SYSTEM NORMAL / DIODE RIPPLE NORMAL

Charging system is normal.

NO CHARGING VOLTAGE

Alternator does not supply charging current to battery.

–	Check belts, connection between alternator and battery and replace belts or cable or alternator as necessary.

LOW CHARGING VOLTAGE

Alternator does not supply charging current to battery and electrical load to system fully.

–	Check belts and alternator and replace as necessary.

HIGH CHARGING VOLTAGE

The voltage from alternator to battery is higher than normal limit during voltage regulating.

–	Check connection and ground and replace regulator as necessary.

–	Check electrolyte level in the battery.

EXCESS RIPPLE DETECTED

One or more diodes in the alternator is not functioning properly.

–	Check alternator mounting and belts and replace as necessary.

The MDX-670P Analyzer

The MDX-670P battery conductance and electrical system analyzer tests batteries as well as starting and charging systems for vehicle.

It displays the test results in seconds and features a built-in printer to provide a copy of the results.

1)	Because of the possibility of personal injury, always use extreme caution and appropriate eye protection when working with batteries.

2)	When charging battery by test result, Battery must be fully charged. To get accurate test result, battery surface voltage must have subsided ahead before test when you test battery after charged. (See following Battery Test Results)

•	When testing the vehicle with old diesel engines, the test result will not be favorable if the glow plug is not heated. Conduct the test after warming up the engine for 5 minutes.

Connect the red clamp to the positive (+) terminal and the black clamp to the negative (-) terminal.

•	For a proper connection, rock the clamps back and forth. The tester requires that both sides of each clamp be firmly connected before testing. A poor connection will produce a CHECK CONNECTION or WIGGLE CLAMPS message. If the message appears, clean the terminals and reconnect the clamps.

Scroll to and select IN VEHICLE or OUT OF VEHICLE for a battery not connected to a vehicle.

•	Following an IN VEHICLE test you will be prompted to test the starting and charging systems.

Scroll to and select REGULAR FLOODED, AGM FLAT PLATE, or AGM SPIRAL where applicable.

•	If the vehicle equipped with ISG function, select the AGM FLAT PLATE.

Scroll to and select the battery's rating system.

•	Mostly, the CCA value is marked on the battery label, but sometimes marked EN or SEA value. Select one of them.

–	CCA : Cold Cranking Amps, as specified by SAE. The most common rating for cranking batteries at 0°F (-17.8°C).

–	EN : Europe-Norm

–	SAE : Society of Automotive Engineers, the European labeling of CCA

5.	Set the selected rating value displayed on the screen to the value marked on the battery label by pressing up and down arrow buttons.

6.	Press ENTER to start test.

After several seconds the tester displays the decision on the battery's condition and the measured voltage. The tester also displays your selected battery rating and the rating units.

Battery Test Results

Result On Printer

Remedy

GOOD BATTERY

No action is required.

GOOD RECHARGE

Battery is in a good state. Recharge the battery and use.
※ You have to follow instruction below when you charge battery and retest, otherwise test result can be inaccurate. (See 'Charge and Retest method after battery charge' below.)

CHARGE & RETEST

Battery is not charged properly.

–	Charge and test the battery again.

※ You have to follow instruction below when you charge battery and retest, otherwise test result can be inaccurate. (See 'Charge and retest method after battery charge' below.)

REPLACE BATTERY

Replace battery and recheck the charging system.

–	Improper connection between battery and vehicle cables may cause "REPLACE BATTERY", retest the battery after removing cables and connecting the tester to the battery terminal directly prior to replacing the battery.

BAD CELLREPLACE

Charge and retest the battery.

–	If recommends "REPLACE BATTERY", replace the battery and recheck the charging system.

[Charge and Retest method after battery charge]

Battery charge

•

* Surface voltage : When b attery is charged electrolyte temperature increases and chemical reaction become active resulting in an excessive increase of battery voltage.

It is known that it takes approximate one day to subside this increased surface voltage completely.

Battery Test after charge

Do not test battery right after the charge. Test battery after battery surface voltage has subsided as instructed in the following procedure.

(1)	When battery charge is complete, install the battery in the vehicle.

(2)	Put IG key to ON position and turn on head lamp with low beam, and wait 5 minutes. (Discharge for 5 minutes)

(3)	Turn off the head lamp and IG key, and wait 5 minutes. (Waiting for 5 minutes)

(4)	Remove +, - cable from the battery and test battery.

•	For an in-vehicle test, the display alternates between the test results and the message "PRESS FOR STARTER TEST".

•	Before starting the test, inspect the alternator drive belt. A belt that is glazed or worn, or lacks the proper tension, will prevent the en¬gine from achieving the rpm levels needed for the test.

8.	Press the ENTER button to proceed with the starter test.

9.	Start the engine when prompted.

10.

The tester displays the decision on the starter system, cranking voltage, and cranking time in milliseconds.

Starter Test Results

Result On Printer

Remedy

CRANKING VOLTAGE NORMAL

System shows a normal starter draw.

CRANKING VOLTAGE LOW

Cranking voltage is lower than normal level.

–	Check starter.

CHARGE BATTERY

The state of battery charge is too low to test.

–	Charge the battery and retest.

REPLACE BATTERY

Replace battery.

–	If the vehicle is not started though the battery condition of "GOOD BATTERY" is displayed, check wiring for open circuit, battery cable connection, starter and repair or replace as necessary.

–	If the engine does crank, check fuel system.

•	For an in-vehicle test, the display alternates between the test results and the message "PRESS FOR CHARGING TEST".

Step 3 : Charging System Test

11.	Press the ENTER button to proceed with the charging test.

12.	Rev the engine with loads off. (Following the on-screen prompts)

13.	The message that engine RPM is detected will be displayed on the screen, idle the engine.

14.	Turn on electrical loads (air conditioner, lamps, audio and etc). Press ENTER to continue.

15.	Turn on electrical loads (air conditioner, lamps, audio and etc). Press ENTER to continue.

16.	The message that engine RPM is detected will be displayed on the screen, idle the engine.

17.	Turn off loads and engine.

18.

The Charging System decision is displayed at the end of the procedure.

Result On Printer

Remedy

NO PROBLEMS

System is showing normal output from the alternator.

NO OUTPUT

No alternator output detected.

–	Check all connections to and from the alternator, especially the connection to the battery. If the connection is loose or heavily corroded, clean or replace the cable and retest.

–	If the belts and connections are in good working condition, replace the alternator. (Older vehicles use external voltage regulators, which may require only replacement of the voltage regulator.)

LOW OUTPUT

Alternator does not supply charging current to battery and electrical load to system fully.

–	Check belts and alternator and replace as necessary.

HIGH OUTPUT

The voltage from alternator to battery is higher than normal limit during voltage regulating.

–	Check connection and ground and replace regulator as necessary.

–	Check electrolyte level in the battery.

EXCESSIVE RIPPLE

The voltage from alternator to battery is higher than normal limit during voltage regulating.

–	Check alternator mounting and belts and replace as necessary.

CHARGE BATTERY

The starter voltage is low and the battery is discharged. Fully charge the battery and repeat the starter system test.

REPLACE BATTERY

Battery must be replaced before the starting system can be tested.

19.	Press the BACK/PRINT button to print the test results or MENU to return to the Options Menu.

Cleaning

1.	Make sure the ignition switch and all accessories are in the OFF position.

2.	Disconnect the battery cables (negative first).

Remove the battery from the vehicle.

•	Care should be taken in the event the battery case is cracked or leaking, to protect your skin from the electrolyte.

•	Heavy rubber gloves (not the household type) should be wore when removing the battery.

4.	Inspect the battery tray for damage caused by the loss of electrolyte. If acid damage is present, it will be necessary to clean the area with a solution of clean warm water and baking soda. Scrub the area with a stiff brush and wipe off with a cloth moistened with baking soda and water.

5.	Clean the top of the battery with the same solution as described above.

6.	Inspect the battery case and cover for cracks. If cracks are present, the battery must be replaced.

7.	Clean the battery posts with a suitable battery post tool.

8.	Clean the inside surface of the terminal clamps with a suitable battery cleaning tool. Replace damaged or frayed cables and broken terminal clamps.

9.	Install the battery in the vehicle.

10.	Connect the cable terminals to the battery post, making sure tops of the terminals are flush with the tops of the posts.

11.	Tighten the terminal nuts securely.

12.

Coat all connections with light mineral grease after tightening.

•	When batteries are being charged, an explosive gas forms beneath the cover of each cell. Do not smoke near batteries being charged or which have recently been charged. Do not break live circuit at the terminals of batteries being charged.

•	A spark will occur when the circuit is broken. Keep open flames away from battery.

Installation

Install in the reverse order of removal.

•	When installing the battery, fix the mounting bracket on the tray correctly.

•	ISG (Idle stop & go) system equipped vehicle always use the AGM battery only. If flooded battery has installed, this can potentially lead to engine electrical trouble or ISG system error.

•	Replace same capacity of the AGM battery.

•

Ensure the AGM battery is placed correctly on the battery tray. In all cases, an AGM battery must be installed and the battery sensor calibrated for the ISG system to function. After the battery has been changed or disconnected, the battery sensor must be calibrated. After connecting the battery, start the engine at least once.

Then park the car for at least 4 hours with the ignition off. After the 4 hours, the engine should be started two times. At this time the battery sensor will be calibrated.

•	Do not open the AGM battery.

•	The AGM battery must not be opened under any circumstances as the introduction of oxygen from the air will cause the battery to lose its chemical equilibrium and rendered non-operational.

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