Kia Optima Hybrid: Engine Control/Fuel System / High Voltage Shut-off Procedures

Kia Optima Hybrid (TF HEV) 2016-2020 Service Manual / Engine Control/Fuel System / High Voltage Shut-off Procedures

High Voltage Shut-off Procedures

Be sure to read and follow the “General Safety Information and Caution” before doing any work related with the high voltage system. Failure to follow the safety instructions may result in serious electrical injuries.

•	High voltage components: High Voltage Battery Pack Assembly, Power Relay Assembly (PRA), BMS ECU, Hybrid Power Control Unit (HPCU), Hybrid Drive Motor, HSG, Electric A/C Compressor, Low DC/DC Converter (LDC), Power Cable, Electric Compressor etc.

1.	Turn the ignition switch OFF and disconnect the auxiliary 12V battery negative (-) terminal.

Remove the safety plug.

(1)	Remove the safety plug cover (A).

(2)	Unfasten the hook (A) and then remove the safety plug (C) by pulling the lever (B) to the direction of arrow.

3.	Wait for more than 5 minutes so that the capacitor in the high voltage system can be fully discharged.

Measure the voltage between the inverter terminals to check that the capacitor in the inverter is discharged completely

(1)	Remove air cleaner assembly and air duct.(Refer to Engine Mechanical System – “Air Cleaner”)

(2)

Disconnect the inverter power cable (A).

Disconnect the inverter power cable as the procedures below.

(3)

Measure the voltage between the inverter (+) terminal and the inverter (-) terminal.

Less than 30V : High voltage circuit properly shut

More than 30V : Faulty on high voltage circuit

If measured more than 30V, check if the safety plug is removed completely.If measured more than 30V despite the safety plug is removed, it can be serious problems on the high voltage circuit. In this case, check DTC and never touch on the high voltage system.

General Safety Information and Caution

Safety Precaution Since hybrid vehicles contain a high voltage battery, if the high voltage system or vehicles are handled incorrectly, this might lead to a serious accidents like electric ...

Specifications

Specifications Fuel Delivery System ItemsSpecificationFuel TankCapacity65 lit. (17.2 U.S.gal., 68.7 U.S.qt., 57.2 Imp.qt.)Fuel FilterTypePaper typeFuel Pressure RegulatorRegulated Fuel Pressure333 ~ 353 ...

Other information:

Kia Optima Hybrid (TF HEV) 2016-2020 Service Manual: Cylinder Block Repair procedures

Disassembly • Use fender covers to avoid damaging painted surfaces. • To avoid damaging the cylinder head, wait until the engine coolant temperature drops below normal temperature before removing it. • When handling a metal gasket, take care not to fold the gasket or damage the contact ...

Kia Optima Hybrid (TF HEV) 2016-2020 Service Manual: Special Service Tools

Personal Protective Equipment NameIllustrationDescriptionInsulation gloveUsed when inspecting or working on the high voltage components[Insulation performance : 1000V / 300A or above]Insulation shoesUsed when inspecting or working on the high voltage componentsInsulation clothesInsulation helmetSafety ...