Kia Optima Hybrid: Hydraulic System / ATF Warmer Description and Operation

Description
The ATF warmer is mounted on the valve body cover to reduce oil viscosity friction by increasing oil temperature under cold condition, which in turn improves fuel efficiency. It is serial mounted on the entry of the Electronic Throttle Controller (ETC), as shown in the diagram, and minimizes the effects of cabin heating system.
Engine coolant is used for circulating heat in order to heat and cool the transaxle oil.
Rapidly elevates the transaxle oil temperature during the initial cold start of the engine.
Prevents over heating of the transaxle oil while the vehicle is moving.
Transaxle oil warm-up and cooling can be done with a single system.
The water coolant and oil are separate in order to exchange heat.

Coolant Flow

Valve Body Repair procedures

Removal     • 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 ...

ATF Warmer Repair procedures

Removal 1. Remove the under cover (A). Tightening torque : 7.8 ~ 11.8N.m (0.8 ~ 1.2kgf.m, 5.8 ~ 8.7 lb-ft) 2. Drain the coolant of engine & transaxle cooling system. (Refer to Engine Mechanical System ...

Other information:

Kia Optima Hybrid (TF HEV) 2016-2020 Service Manual: SRS Control Module (SRSCM) Description and Operation


Description The primary purpose of the SRSCM (Supplemental Restraints System Control Module) is to discriminate between an event that warrants restraint system deployment and an event that does not. The SRSCM must decide whether to deploy the restraint system or not. After determining that pretensioners ...

Kia Optima Hybrid (TF HEV) 2016-2020 Service Manual: Turn Signal Lamp Repair procedures


Removal Door Mirror Turn Signal Lamp 1. Disconnect the negative (-) battery terminal. 2. Remove the mirror (C) after disconnecting the heater connector (A) and BSD warning connector (B). 3. Remove the door mirror housing (A) after loosening the mounting screw.     Take care not to damage the ...

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