Kia Optima: Oil Pump Uni t(OPU) Description and Operation - Hydraulic System - Automatic Transaxle SystemKia Optima: Oil Pump Uni t(OPU) Description and Operation

Description
The oil pump main relay is installed within the HEV fusible link box of the engine room. When the Oil Pump Unit (OPU) triggers the oil pump main relay, electric current needed to operate the Electric Oil Pump (EOP) passes through the Oil Pump Unit (OPU) and is supplied to the Electric Oil Pump (EOP).
In general, the Electric Oil Pump (EOP) operation is controlled by TCM via CAN communication, but in case of CAN communication failure, there is a back-up hard wiring between the TCM and Oil Pump Unit (OPU) as shown below.

Oil Pump Unit(OPU) Control System


Oil Pump Unit(OPU) Control System


Electric Oil Pump (EOP) Repair procedures
Removal 1. Disconnect the 12V battery negative (-) cable. 2. Remove the under cover (A). Tightening torque : 7.8 ~ 11.8 N.m (0.8 ~ 1.2 kgf.m, 5.8 ~ 8.7 lb-ft) 3. Remove the electric ...

Oil Pump Uni t(OPU) Specifications
Specifications Operating voltage (V)12 Current15 ~ 20A (normal), 45A (Max.) ...

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