Hyundai Santa Fe: Hydraulic System / Underdrive Brake Control Solenoid Valve (UD/B_VFS). Repair procedures
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Refer to the DTC manual for the check procedure.
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Be careful not to damage the parts located under the vehicle
(floor under cover, fuel filter, fuel tank and canister) when
raising the vehicle using the lift.
(Refer to General Information - "Lift and Support Points")
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When the solenoid valve Diagnostic Trouble Codes (DTC) is on,
perform the following procedure to replace it.
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Automatic transaxle is composed of delicate components. Be careful
not to cause any damage on the component in the course of assembly
and disassembly.
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Maintain clean condition so that foreign substance does not
get into the automatic transaxle.
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Use a coated apron, latex gloves, and stainless tray to prevent
foreign substance from getting into the transaxle.
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Automatic transaxle fluid (ATF) can be reused. Collect it using
a clean 10-liter beaker.
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1. |
Turn ignition switch OFF and disconnect the negative (-) battery cable.
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2. |
Remove the air duct and the air cleaner assembly.
(Refer to Engine Mechanical System - "Air Cleaner")
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3. |
Separate the air bleed hose (B) and then wiring bracket (A).
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4. |
Remove the under cover.
(Refer to Engine Mechanical System - "Engine Room Under Cover")
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5. |
Remove the drain plug (A) and reinstall the drain plug after draining
ATF totally.
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Drain plug tightening torque :
33.3 - 43.1 N.m (3.4 - 4.4 kgf.m, 24.6 - 31.8 lb-ft)
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Replace the gasket before reinstalling the drain plug.
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6. |
Loosen the mounting bolts (A) of the valve body cover.
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Tightening torque :
11.8 - 13.7 N.m (1.2 - 1.4 kgf.m, 8.7 - 10.1 lb-ft)
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Be careful when removing the valve body cover because
the remaining ATF remains in the valve body cover.
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Replace the gasket (A) before reinstalling the valve
body cover.
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After the installation, start the engine and then check
if there are any leakages from the valve body cover.
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7. |
Loosen the bolts and then removing the main harness (A).
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Tightening torque :
9.8 - 11.8 N.m (1.0 - 1.2 kgf·m, 7.2 - 8.7 lb-ft)
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8. |
Remove the support bracket (A).
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Tightening torque :
9.8 - 11.8N.m (1.0 - 1.2 kgf.m, 7.2 - 8.7 lb-ft)
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9. |
Remove the roller (A) and bolt (B).
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Tightening torque :
9.8 - 11.8N.m (1.0 - 1.2 kgf.m, 7.2 - 8.7 lb-ft)
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10. |
Remove the underdrive brake control solenoid valve (A).
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Note the value carefully and check the value again before assembly.
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Inputting an invalid value (A) may cause the abnormal shifting
shock while TCM learning.
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1. |
To install, reverse the removal procedure.
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2. |
Inject the automatic transaxle oil and inspect the oil level.
(Refer to Automatic Transaxle System - "Automatic Transaxle Fluid (ATF)")
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After ATF level check or exchange, be sure to remove
residual ATF on transaxle case.
(Be especially sure to remove residual ATF between automatic
transaxle case and valve body cover)
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After installing the valve body cover, make sure to
check the oil leakage at the connection area with the
engine ON
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3. |
Clear the diagnostic trouble codes (DTC) using the diagnostic tool.
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Even though disconnecting the battery negative terminal,
the DTCs will not be cleared. So, be sure to clear the
DTCs using the diagnostic tool.
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4. |
Reset the automatic transaxle adaptive values using the diagnostic tool.
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5. |
Input the oil pressure characteristics using the diagnostic tool.
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(1) |
Select ‘Oil-pressure Characteristics (Solenoid Valve Replacement)’
in the S/W Management.
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(2) |
Select the replaced solenoid valve.
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(3) |
Check the code marked on the solenoid valve.
(※ Caution : Check the code at first before replacement)
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(4) |
If the code is inputted 2 times correctly, the procedure is
completed.
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6. |
In order to prevent start delay and gear shift shock during acceleration
and start, perform TCM learning after replacing the solenoid valve.
(Refer to Automatic Transaxle Control System - "Repair Procedures")
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Specifications
▷ Control type : Normally high type
Shape
Items
Specifications
Control current [mA]
0 - 1100
Supply pressure [kpa (kgf/cm², psi)]
1569...
Description
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Overdrive clutch control solenoid valve(OD/C_VFS) is attached to the
valve body.
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This variable force solenoid valve directly controls the hydraulic pressure
inside the overdrive clutch...
Other information:
Component Location (1)_Valve
Body Cover
1. Valve Body
Cover
2. Valve Body Cover Gasket
3. Solenoid Valve Connector
Component Location (2)_Solenoid
Valve
1. 26 Brake
Control Solenoid Valve
2...
Description
Intake Air Temperature Sensor (IATS) is included inside Manifold Absolute Pressure
Sensor and detects the intake air temperature.
To calculate precise air quantity, correction of the air temperature is needed
because air density varies according to the temperature...
Categories
WARNING
To reduce the risk of an air bag deploying unexpectedly and causing serious
injury or death:
Do not hit or allow any objects to impact the locations where air
bags or sensors are installed.
Do not perform maintenance on or around the air bag sensors. If
the location or angle of the sensors is altered, the air bags may deploy when
they should not or may not deploy when they should.
Installing bumper guards with nongenuine Hyundai or non-equivalent
parts may adversely affect the collision and airbag deployment performance.
Press the Engine Start/Stop button to the OFF or ACC position and
wait for 3 minutes when the vehicle is being towed to prevent inadvertent air
bag deployment.
Have all air bag repairs performed by an authorized HYUNDAI dealer.
read more
Underdrive Brake Control Solenoid Valve (UD/B_VFS). Specifications
Overdrive Clutch Control Solenoid Valve (OD/C_VFS). Description and operation