Kia Niro: Charging System / Repair procedures

On-vehicle Inspection
  

Check that the auxiliary 12V battery cables are connected to the correct terminals.

Disconnect the auxiliary 12V battery cables when the battery is given a quick charge.

Never disconnect the auxiliary 12V battery while the engine is running.

Check The Auxiliary 12V Battery Terminals And Fuses

1.

Check that the auxiliary 12V battery terminals are not loose or corroded.

2.

Check the fuses for continuity.

Check Discharge Warning Light Circuit

1.

Warm up the engine and then turn it off.

2.

Turn off all accessories.

3.

Turn the ignition switch "ON". Check that the discharge warning light is lit.

4.

Start the engine and Check that the light goes off.

If the light does not go off as specified, then refer to the LDC diagnostics section for further diagnosis of auxiliary 12V battery charging system problem.

Charging System
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Auxiliary 12V 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. ...

Other information:

Kia Niro (DE HEV) Owners Manual: Recommended SAE viscosity number
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Kia Niro 2017 (DE HEV) Service Manual: Condenser Components and components location
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