Kia Stinger CK: Hydraulic System / 8LR Brake Control Solenoid Valve (8LR/B_VFS)

Kia Stinger (CK) 2018-2023 Service Manual / Automatic Transmission System / Hydraulic System / 8LR Brake Control Solenoid Valve (8LR/B_VFS)

Specifications
Specifications

Item
Specification
Control type
N/L (Normal Low)
Control pressure kpa (kgf/cm², psi)
0 - 1,569.06 (0 - 16, 0 - 227.57) 
Current (mA)
0 - 1,100 
Coil resistance (Ω)
5.3 ± 0.3

Components and components location
Components Location

1. 8LR brake control solenoid valve
2. Solenoid valve support bracket

Description and operation
Description
•

8LR brake control solenoid valve is a Variable Force Solenoid (VFS) type.

•

When TCM supplies variable current to solenoid valve, hydraulic pressure of 8LR brake is controlled directly by solenoid valve.

Solenoid Valve Operation Table


 Solenoid Valve
Brake
8LR/B_VFS
8LR/B
P


N
●
●
1
●
●
2


3


4


5


6


7


8
●
●
REV
●
●

Schematic diagrams
Circuit Diagram

Repair procedures
Inspection
1.

Switch "OFF" ignition
2.

Disconnect the main connector (A).
3.

Measure the resistance between power terminal (22) and signal terminal (23).

Specification : 5.3 ± 0.3 Ω

Removal
  
•

Maintain clean condition so that foreign substance does not get into the automatic transmission.
•

Use a coated apron, latex gloves, and stainless tray to prevent foreign substance from getting into the transmission.

1.

Remove the under cover.

(Refer to Engine Mechanical System - "Engine Room Under Cover").

2.

Remove the ATF drain plug (A), allow the fluid to drain out and then reinstall the drain plug.

Tightening torque :

22.6 - 24.5 N·m (2.3 - 2.5 kgf·m, 16.6 - 18.1 lb·ft)

  
•

ATF can be reused. Collect it in a clean beaker.

•

The existing ATF drain plug O-ring must be replaced with a new one. (Do not reuse it.)
3.

Disconnect the main connector (A).
4.

Remove the valve body cover.

(1)

Loosen the all valve body mounting bolts except for the bolts (A) in the corner.

Tightening torque :

13.7 - 15.7 N·m (1.4 - 1.6 kgf·m, 10.1 - 11.6 lb·ft)

(2)

Loosen the two bolts (A) in the corner after supporting the valve body cover on a jack and then remove the valve body cover by lowering the jack slowly.

  

Be careful when removing the valve body cover because the remaining ATF remains in the valve body cover.
5.

Remove the valve body assembly (A) after loosening the bolts.

Tightening torque :

9.8 - 11.8 N·m (1.0 - 1.2 kgf·m, 7.2 - 8.7 lb·ft)

6.

Remove the E-module (A) after loosening the bolts.

Tightening torque :

9.8 - 11.8 N·m (1.0 - 1.2 kgf·m, 7.2 - 8.7 lb·ft)

  

When installing, after mounting the E-module, lightly tap the connector part (A) to insert the connector certainly and then tighten the bolts.
7.

Remove the solenoid valve support bracket (A).

Tightening torque :

11.8 - 13.7 N·m (1.2 - 1.4 kgf·m, 8.7 - 10.1 lb·ft)

8.

Remove the pin (A).
9.

Remove the 8LR brake control solenoid valve (A).
Installation
1.

Install in the reverse order of removal.

  
•

Check the code (oil pressure characteristics value) at the first before installing the solenoid valve.

•

Check if the pipe (A) is inserted on the marked area before mounting the valve body assembly.
2.

Perform the procedures below after installing.

(1)

Refill the automatic transmission with fluid.

(Refer to Hydraulic System - "Fluid")

(2)

Clear the diagnostic trouble codes (DTC) using the KDS. Disconnecting the battery negative terminal will not clear the DTCs. Clear DTCs using the KDS at all times.
(3)

Reset the automatic transmission adaptive values using the KDS.
(4)

Perform the oil pressure characteristics input procedure using the KDS.

(Refer to Hydraulic System - "Oil pressure characteristics input")

(5)

Perform the TCM adaptive values learning procedure.

(Refer to Automatic Transmission Control System - "Repair procedures")

(6)

After installing, check for leakage of fluid from hose connection during engine start.

Valve Body

6 Clutch Control Solenoid Valve (6/C_VFS)

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