Kia Optima: Charging System / Battery

Kia Optima DL3 2019-2020 Service and Repair Manual / Engine Electrical System / Charging System / Battery

Description and operation
Description
1.

The CMF(Closed Maintenance Free) battery is, as the name implies, totally maintenance free and has no removable battery cell caps.

2.

The CMF(Closed Maintenance Free) battery does not require water replenishment for the repair.

3.

The battery is completely sealed, except for small vent holes in the cover.

  

After disconnecting then reconnecting the battery negative cable, reset some parts that require the reset procedures.

(Refer to Body Electrical System - "General Information")

Specifications
Specification

▶CMF68L-DIN

Item
Specification
Model typeModel type
CMF68L-DIN
Capacity [20HR/5HR] (AH)
68 / 54
Cold Cranking Amperage (A)
600 (SAE / EN)
Reserve Capacity (Min)
113

  

Model type description

Cold Cranking Ampere (CCA): Cold Cranking Amps is a rating used in the battery industry to define a battery's ability to start an engine in cold temperatures.

The rating is the number of amps a new, fully charged battery can deliver at -18 °C(-0.4 °F) for 30 seconds, while maintaining a voltage of at least 7.2 volts for a 12 volt battery.

The higher the CCA rating, the greater the starting power of the battery.

RESERVE CAPACITY (RC) : Reserve Capacity is a battery industry rating, defining a battery's ability to power a vehicle with an inoperative alternator or fan belt.

The rating is the number of minutes a battery at 26.7 °C(80 °F) can be discharged at 25 amps and maintain a voltage of 10.5 volts for a 12 volt battery.

The higher the reserve rating, the longer your vehicle can operate should your alternator or fan belt fail.

  

BCI Type

Capacity
(5 hr / 20 hr)
Length
Width
Height
Total Height
L (mm)
W (mm)
H (mm)
TH (mm)
28/35
188 - 192
126 - 130
198 - 202
218 - 222
32/40
194 - 198
133 - 137
199 - 203
223 - 227
36/45
203 - 207
173 - 177
200 - 204
221 - 225
44/55
213 - 217
173 - 177
198 - 202
218 - 222
48/60
228 - 232
173 - 177
200 - 204
221 - 225
54/68
258 - 262
173 - 177
198 - 202
220 - 224
56/70
258 - 262
173 - 177
198 - 202
223 - 227
64/80
274 - 278
170 - 174
198 - 202
221 - 225
70/88
349 - 353
172 - 176
186 - 200
183 - 187
72/90
300 - 304
170 - 174
200 - 204
221 - 225
76/95
294 - 298
172 - 176
198 - 202
220 - 224
80/100
326 - 330
170 - 174
203 - 207
225 - 229

DIN Type

Capacity
(5 hr / 20 hr)
Length
Width
Height
Total Height
L (mm)
W (mm)
H (mm)
TH (mm)
36/45
205 - 207
173 - 175
164 - 168
188 - 190
48/60
240 - 242
173 - 175
164 - 168
188 - 190
54/68
276 - 278
173 - 175
164 - 168
188 - 190
64/80
313 - 315
173 - 175
164 - 168
188 - 190
72/90
351 - 353
173 - 175
164 - 168
188 - 190
80/100
351 - 353
173 - 175
164 - 168
188 - 190
88/110
392 - 394
173 - 175
164 - 168
188 - 190

AGM DIN Type

Capacity
(5 hr / 20 hr)
Length
Width
Height
Total Height
L (mm)
W (mm)
H (mm)
TH (mm)
40/50
205 - 207
173 - 175
164 - 168
188 - 190
48/60
227 - 229
173 - 175
164 - 168
188 - 190
56/70
276 - 278
173 - 175
164 - 168
188 - 190
64/80
312 - 314
173 - 175
164 - 168
188 - 190
72/90
351 - 353
173 - 175
164 - 168
188 - 190
84/105
392 - 394
173 - 175
164 - 168
188 - 190

Repair procedures
Removal

Battery

1.

Turn the ignition switch OFF.

2.

Disconnect the battery (-) terminal (A).

Tightening torque :

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

3.

Remove the battery (+) terminal (A).

Tightening torque :

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

4.

Remove the battery mouting bracket (A).

5.

Remove the battery insulation pad after removing the battery (B).

Tightening torque :

19.6 - 29.4 N.m (1.9 - 3.0 kgf.m, 13.7 - 30.4 Ib-ft)

Battery tray

1.

Remove the battery.

(Refer to "Removal")

2.

Remove the air cleaner assembly.

(Refer to Engine Mechanical System - "Air Cleaner")

3.

Remove the ECM.

(Refer to Engine Control / Fuel System - "Engine Control Module (ECM)")

4.

Remove the battery tray (A) after loosening the nuts.

Tightening torque :

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

Installation
1.

Install in the reverse order of removal.

  

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

  

After disconnecting then reconnecting the battery negative cable, reset some parts that require the reset procedures.

(Refer to Body Electrical System - "General Information")

Inspection

Battery Voltage and Status

Check the battery voltage and status by using a battery tester.

Battery Terminal

1.

Move back and forth to check if the battery terminals (A) are loose or corroded. Clean any corroded terminals.

If the battery positive connection is loose, disconnect the ground (GND) cable first before attempting to remove or tighten the positive connection to prevent personal injury.

2.

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

(1)

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

(2)

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

Tightening torque :

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

3.

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

(1)

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

Tightening torque :

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.

2.

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.

3.

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.

4.

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.

5.

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]

1.

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

2.

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.

3.

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.

4.

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

5.

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

Cleaning
1.

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

2.

Disconnect the battery cables (negative first).

3.

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.

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