Kia Optima Hybrid: Automatic Transaxle Control System / Underdrive Brake Control Solenoid Valve (UD/B_VFS) Description and Operation

Kia Optima Hybrid (TF HEV) 2016-2020 Service Manual / Automatic Transaxle System / Automatic Transaxle Control System / Underdrive Brake Control Solenoid Valve (UD/B_VFS) Description and Operation

Description
Underdrive brake control solenoid valve(UD/B_VFS) is attached to the valve body. This variable force solenoid valve directly controls the hydraulic pressure to the underdrive brake.

35R Clutch Control Solenoid Valve (35R/C_VFS) Repair procedures

Inspection 1. Turn ignition switch OFF. 2. Remove the air duct (A). Tightening torque: 7.8 ~ 9.8 N.m (0.8 ~ 1.0 kgf.m, 5.8 ~ 7.2 lb-ft) 3. Remove the air cleaner assembly. (1) Disconnect the breather hose ...

Underdrive Brake Control Solenoid Valve (UD/B_VFS) Specifications

Specifications Direct control VFS [UD/B] Control type : Normal high type Control Pressure kpa(kgf/cm?, psi)500.14 ~ 9.81(5.1 ~ 0.1, 72.54 ~ 1.42)Current value (mA)50 ~ 850 Internal resistance (?)5.1 ...

Other information:

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


Troubleshooting Vehicle inspection SYMPTOM CHART SymptomSuspect AreaRemedy (See page)Squeak or grunt-noise from the front suspension, occurs more in cold ambient temperatures-more noticeable over rough roads or when turningFront stabilizer barUnder these conditions, the noise is acceptable.Clunk-noise ...

Kia Optima Hybrid (TF HEV) 2016-2020 Service Manual: Knock Sensor (KS) Description and Operation


Description Knocking is a phenomenon characterized by undesirable vibration and noise and can cause engine damage. Knock Sensor (KS) is installed on the cylinder block and senses engine knocking. When knocking occurs, the vibration from the cylinder block is applied as pressure to the piezoelectric element. ...

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