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Home >> Kia >> 2020 >> Optima Hybrid EX >> Repair and Diagnosis >> Transmission >> Transmission Control Systems >> Automatic Transaxle Control System (HEV) >> Transaxle Oil Temperature Sensor >> Repair Procedures >> Inspection

Repair Procedures: Inspection

WARNING:
  • Be sure to read and follow the "GENERAL SAFETY INFORMATION & CAUTION " before doing any work related with the high voltage system. Failure to follow the safety instructions may result in serious electrical injuries.
  • Be sure to shut off the high voltage circuit according to the "HIGH VOLTAGE SHUT-OFF PROCEDURES " before doing any work related with the high voltage system to avoid serious electrical injuries.
  1. Shut off the high voltage circuit.

    (Refer to Automatic Transaxle System - "HIGH VOLTAGE SHUT-OFF PROCEDURE ")

  2. Remove the hybrid power control unit (HPCU) assembly.

    (Refer to Hybrid Control System - "HYBRID POWER CONTROL UNIT ")

  3. Remove the high voltage cable (A) and HPCU tray (B).

    Tightening torque: 

    19.6 - 29.4 N.m (2.0 - 3.0 kgf.m, 14.5 - 21.7 lb.ft)

    G13388271Courtesy of KIA MOTORS AMERICA, INC.
  4. Disconnect the solenoid valve connector (A).
    G13388272Courtesy of KIA MOTORS AMERICA, INC.
  5. Measure the resistance between + terminal (9) and - terminal (13).
    G13388273Courtesy of KIA MOTORS AMERICA, INC.
  6. Check that the resistance is within the specification.
Item Specification
Temp.[(°C)°F]/Resistance (kΩ) (-40)-40/48.1
(-20)-4.0/15.6
(0) 32.0/5.88
(20) 68.0/2.51
(40) 104.0/1.19
(60) 140.0/0.61
(80) 176.0/0.32
(100) 212.0/0.18
(120) 248.0/0.10
(140) 284.0/0.06
(150) 302.0/0.05