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Home >> Audi >> 2016 >> S5 Prestige, 2D Convertible >> Repair and Diagnosis >> External Pages >> Different variant/trim >> Section 36 (Steering (Coupe)) >> 48 Steering >> Power Steering Hydraulics >> Power Steering Pump Delivery Pressure, Checking, With/Without Dynamic Steering >> Power Steering Pump, Checking Delivery Pressure, 4-Cylinder TFSI >> Checking

Power Steering Pump, Checking Delivery Pressure, 4-Cylinder TFSI: Checking

WARNING: This page is about a different variant/trim than selected.

-- Clamp off the evacuation hose -1- and return hose -2- using the :3094  .

Fig 1: Locating Suction & Return Hose Clamping Location
GWWA48-10368Courtesy of AUDI OF AMERICA, LLC
CAUTION:
  • The :3094  must not be secured on the return hose -2- near the check valve area. Otherwise the check valve will be damaged.
  • The check valve is located in the return hose -2- between the hose clamps -arrows-.

Applies to vehicles that have a pressure line with a separating point. Refer to -item  ) OVERVIEW - HYDRAULIC LINE, RESERVOIR, 4-CYLINDER TFSI, WITHOUT DYNAMIC STEERING - PRESSURE LINE

Fig 2: Identifying Tester
GWWA48-10379Courtesy of AUDI OF AMERICA, LLC

-- Remove The Noise Insulation. Refer to NOISE INSULATION, REMOVING AND INSTALLING .

-- Engage the tester -3- on the control arm -1- using a hook -2-.

-- Position the :VAS6208  below to collect the hydraulic oil.

-- Loosen the union nut -5-. Counterhold at the hex head.

Fig 3: Identifying Pressurized Line To Crossbrace
GWWA48-10429Courtesy of AUDI OF AMERICA, LLC

-- Remove the nut -3-.

-- Mount the :VAG1402  as shown in illustration.

Fig 4: Installing V.A.G 1402
GWWA48-10582Courtesy of AUDI OF AMERICA, LLC
  1. Pressure line with separating point
  2. :VAG1402/6 
  3. :VAG1402 
  4. :VAG1402/6 
  5. :VAG1402/3 

-- Attach the :VAG1402  hoses to the open connections on the pressure hose as illustrated.

Applies to vehicles without a separating point. Refer to -item  ) OVERVIEW - HYDRAULIC LINE, RESERVOIR, 4-CYLINDER TFSI, WITHOUT DYNAMIC STEERING - PRESSURE LINE

Fig 5: Identifying Bolts -1- And Hose Clamp 3094
GWWA48-10617Courtesy of AUDI OF AMERICA, LLC

-- Remove the screws -1- and remove the pressure line from the power steering pump.

-- Mount the :VAG1402  as shown in illustration.

Fig 6: Identifying Power Steering Pump Delivery Pressure, V6 TDI, Generation I With SCR And V6 TDI, Generation II, Test Assembly
GWWA48-10620Courtesy of AUDI OF AMERICA, LLC
  1. Power Steering Pump
  2. :VAG1402/18-1  (refer to  POWER STEERING PUMP, CHECKING DELIVERY PRESSURE, 4-CYLINDER TFSI - REPLACE THE POWER STEERING TEST UNIT - ADAPTER 18-1) with Power Steering Test Unit - Adapter Set - Adapter 3:VAG1402/17-3 
  3. Screw for mounting the pressure line. Refer to -item  OVERVIEW - HYDRAULIC LINE, RESERVOIR, VEHICLES WITH 4-CYLINDER DIESEL ENGINE, VEHICLES WITHOUT DYNAMIC STEERING - BOLT
  4. :VAG1402/6 
  5. :VAG1402 
  6. Pressure Line
  7. :VAG1402/18-2  with :VAG1402/17-3 
  1. Replace the Power Steering Test Unit - Adapter 18-1:VAG1402/18-1  seal if it is damaged or leaking. Refer to -item  OVERVIEW - HYDRAULIC LINE, RESERVOIR, VEHICLES WITH 4-CYLINDER DIESEL ENGINE, VEHICLES WITHOUT DYNAMIC STEERING - SEAL Refer to the Parts Information..
NOTE:

Position the :VAG1402/17-3  on the :VAG1402/18-1  so that the hose from the :VAG1402/6  does not touch the pulley and/or ribbed belt.

Tighten the union nuts on the :VAG1402/17-3  and the :VAG1402/6  hoses hand-tight with an open-end wrench.

Continuation For All 

Fig 7: Ensuring Lever On Pressure Gauge Stands In Open/Closed Position
GWWA48-10121Courtesy of AUDI OF AMERICA, LLC

-- Make sure that lever on pressure gauge stands in position -2-.

-- Remove the :3094  .

-- Start engine without giving gas.

-- Turn the steering wheel from lock to lock about 10 times.

-- Switch off engine and, if needed, fill hydraulic fluid in reservoir.

NOTE:

To avoid damage to pump, observe the following:

Pressure gauge shut-off valve must not remained closed longer than 10 seconds during this test.

Start engine without giving gas and run at idle.

Read the pump pressure immediately after starting at idle speed (have it read by second technician, if necessary).

Because pressure falls over the course of the test, the highest pressure shown is the decisive measurement.

-- Now check delivery pressure.

-- Start the engine.

-- Close the shut-off valve to position -1- while the engine is idling and read the pressure (the lever must point away from pressure hose). Do not perform measurement longer than 10 seconds.

Fig 8: Ensuring Lever On Pressure Gauge Stands In Open/Closed Position
GWWA48-10121Courtesy of AUDI OF AMERICA, LLC

Delivery pressure target value - vehicles with and without dynamic steering: 110 to 130 bar (1595.41 to 1885.5 psi)

If the pressure is not at the specified value, replace the power steering pump. Refer to OVERVIEW - POWER STEERING PUMP, 4-CYLINDER TFSI, WITH DYNAMIC STEERING  or OVERVIEW - POWER STEERING PUMP, 4-CYLINDER TFSI, WITHOUT DYNAMIC STEERING .

-- Switch off engine.

-- Remove the :VAG1402 

Tightening Specifications. Refer to OVERVIEW - HYDRAULIC LINE, RESERVOIR, 4-CYLINDER TFSI, WITH DYNAMIC STEERING .

-- Note the line installation location when bolting the line connection. The markings -1 and 2- must be opposite each other.

Fig 9: Identifying Pressurized Line To Crossbrace
GWWA48-10429Courtesy of AUDI OF AMERICA, LLC

-- Tighten the union nut -1-. Counterhold at the hex head.

-- Tighten the nut -3- and the rubber bushing -4- if necessary.

-- Bleed the steering. Refer to STEERING, BLEEDING AFTER REPLACING .

-- Check power steering fluid level. Refer to POWER STEERING FLUID LEVEL, CHECKING .

-- Check all open line connections for leaks. Refer to STEERING, CHECKING FOR LEAKS .

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