Kia Optima: Underdrive Brake Control Solenoid Valve (UD/B_VFS) Repair procedures - Automatic Transaxle Control System - Automatic Transaxle SystemKia Optima: Underdrive Brake Control Solenoid Valve (UD/B_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 (A).
(2)
Disconnect the air intake hose (B) and then remove the air cleaner assembly (C).

Tightening torque:
Hose clamp bolt:
2.9 ~ 4.9 N.m (0.3 ~ 0.5 kgf.m, 2.2 ~ 3.6 lb-ft)
Air cleaner assembly bolts:
7.8 ~ 9.8 N.m (0.8 ~ 1.0 kgf.m, 5.8 ~ 7.2 lb-ft)


   
   
When installing the air intake hose, the plate of the hose clamp must be in line with the stopper of the hose.
When installing the air intake hose, the center of the mark of hose must be in line with the throttle body rib.


4.
Remove the solenoid valve connector (A).


5.
Measure resistance between signal terminal and ground terminal.
6.
Check that the resistance is within the specification.
Removal
   
   
Replacing an on/off solenoid valve (SS-A, SS-B) does not require additional hydraulic pressure adjustment; however, the hydraulic pressure will need to be adjusted after replacing the VFS solenoid valve. If replacing the VFS solenoid valve; also replace the valve body assembly.
(Refer to Hydraulic System - "Valve Body")
Underdrive Brake Control Solenoid Valve (UD/B_VFS) Schematic Diagrams
Circuit Diagram ...

Overdrive Clutch Control Solenoid Valve (OD/C_VFS) Description and Operation
Description Overdrive clutch control solenoid valve(OD/C_VFS) is attached to the valve body. This variable force solenoid valve directly controls the hydraulic pressure to the overdrive clutch. ...

See also:

Seat Heater (Non-Air Ventilation) Schematic Diagrams
Circuit Diagram ...

Steering Gear box Repair procedures
Replacement 1. Remove the front wheel & tire. Tightening torque : 88.3 ~ 107.9N.m (9.0 ~ 11.0kgf.m, 65.1 ~ 79.6lb-ft)     Be careful not to damage to the hub ...

Specifications
Specification Ignition System ItemsSpecificationIgnition coilPrimary resistance0.62 ± 10 % (?)Secondary resistance7.0 ± 15 % (k?)Spark plugsTypeFXU16HR11Gap1.0 ~ 1.1 mm (0.0394 ~ 0.0433 in.) ...

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