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Hyundai Equus: Battery Repair procedures - Charging System - Engine Electrical System - Hyundai Equus VI 2009-2026 Service ManualHyundai Equus: Battery Repair procedures

Second generation VI (2009–2026) / Hyundai Equus VI 2009-2026 Service Manual / Engine Electrical System / Charging System / Battery Repair procedures

Removal
1.
Disconnect the battery sensor connector (A), battery nagative terminal (B) and positive terminal (C).

2.
Disconnect the vent hose connector (A) from the battery air vent hole.

3.
Remove the mounting bracket (A) and then remove the battery (B).

Installation
1.
Install in the reverse order of removal.
Battery (-)terminal installation:
4.0 ~ 6.0 N.m (0.4 ~ 0.6 kgf.m, 3.0 ~ 4.4 lb-ft)
Battery (+)terminal installation:
7.8 ~ 9.8 N.m (0.8 ~ 1.0 kgf.m, 5.8 ~ 7.2 lb-ft)
Battery mounting bracket and the insulation pad installation:
8.8 ~ 13.7 N.m (0.9 ~ 1.4 kgf.m, 6.5 ~ 10.1 Ib-ft)
   
•
When installing the battery, fix the mounting bracket on the tray correctly.
Cleaning
1.
Make sure the ignition switch and all accessories are in the OFF position.
2.
Remove the battery from the vehicle.
(Refer to Charging System - "Battery")
   
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 worn when removing the battery.

3.
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.
4.
Clean the top of the battery with the same solution as described above.
5.
Inspect the battery case and cover for cracks. If cracks are present, the battery must be replaced.
6.
Clean the battery posts with a suitable battery post tool.
7.
Clean the inside surface of the terminal clamps with a suitable battery cleaning tool. Replace damaged or frayed cables and broken terminal clamps.
8.
Install the battery in the vehicle.
9.
Connect the cable terminals to the battery post, making sure tops of the terminals are flush with the tops of the posts.
10.
Tighten the terminal nuts securely.
11.
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.

Vehicle parasitic current inspection
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 electriacl 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.
A.
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.
B.
Reconnect the suspected parasitic current draw circuit fuse only and search for suspected unit by removing a compoconnected with the circuit one by one until the parasitic draw drops below limit value.
Limit value (after 10~20 min.) : Below 50mA
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