Subaru Outback manuals

Subaru Outback: VDC Control Module and Hydraulic Control Unit (VDCCM&H/U)

Subaru Outback (BR) 2010-2015 Service Manual / Chassis / Vehicle Dynamics Control (VDC) / VDC Control Module and Hydraulic Control Unit (VDCCM&H/U)

A: REMOVAL

1) Disconnect the ground cable from battery.

2) Remove the air intake boot.

3) Remove the VDC control module & hydraulic control unit (VDCCM&H/U).

  1. Remove any dirt from around the VDCCM&H/U.
  2. Push the lock button (a), pull down the lock lever (b) and disconnect the VDCCM&H/U connector.

CAUTION: Do not pull on the harness when disconnecting the connector.

Subaru Outback. Vehicle Dynamics Control (VDC)

  1. Using a flare nut wrench, disconnect each brake pipe from VDCCM&H/U.

CAUTION:

Subaru Outback. Vehicle Dynamics Control (VDC)

  1. Remove the bolt, and then remove the VDCCM&H/U from the bracket damper.

CAUTION:

Subaru Outback. Vehicle Dynamics Control (VDC)

B: INSTALLATION

CAUTION:

1) Install each part in the reverse order of removal.

Tightening torque: Refer to "COMPONENT" of "General Description". <Ref. to VDC-5, VDC CONTROL MODULE & HYDRAULIC CONTROL UNIT (VDCCM&H/U), COMPONENT, General Description.>

2) Bleed air from the brake system. <Ref. to BR-54, Air Bleeding.>

3) Perform parameter confirmation, selection, and registration.

NOTE:

  1. Check that the applied model and grade of the relevant vehicle are included. <Ref. to VDC(diag)-19, PARAMETER CHECK, OPERATION, Subaru Select Monitor.>
  2. If the applied model and grade of the target vehicle are not included on the {Confirm on parameter} display screen, perform parameter selection and registration. <Ref. to VDC(diag)-19, PARAMETER SELECTION, OPERATION, Subaru Select Monitor.>

4) Perform mode setting for each sensor.

C: INSPECTION

1) Check the identification label (a) of the VDC control unit & hydraulic control unit (VDCCM&H/U).

NOTE: For the identification label, refer to "SPECIFICATION" in "General Description". <Ref. to VDC-2, SPECIFICATION, General Description.>

Subaru Outback. Vehicle Dynamics Control (VDC)

2) Check the condition of connection and settlement of connector, and correct or replace if defective.

1. CHECKING THE HYDRAULIC UNIT ABS OPERATION BY PRESSURE GAUGE

1) Lift up the vehicle, and then remove the wheel.

2) Remove the air bleeder screws from FL and FR caliper bodies.

3) Connect two pressure gauges to FL and FR caliper bodies.

CAUTION:

NOTE: Wrap sealing tape around the pressure gauge.

Subaru Outback. Vehicle Dynamics Control (VDC)

4) Bleed air from the pressure gauges and the FL and FR caliper bodies.

5) Perform ABS sequence control. <Ref. to VDC-17, ABS Sequence Control.>

6) When the hydraulic unit begins to work, first the FL side performs decompression, hold and compression, and then the FR side performs decompression, hold and compression.

7) Read values indicated on the pressure gauge and check if the fluctuation of the values between decompression and compression meets the standard values. Depress the brake pedal and check that the kick-back is normal, and tightness is normal.

Subaru Outback. Vehicle Dynamics Control (VDC)

8) Disconnect the pressure gauges from FL and FR caliper bodies.

9) Install the air bleeder screws of FL and FR caliper bodies.

10) Remove the air bleeder screws from RL and RR caliper bodies.

11) Connect two pressure gauges to RL and RR caliper bodies.

12) Bleed air from RL and RR caliper bodies, and pressure gauge.

13) Perform ABS sequence control. <Ref. to VDC-17, ABS Sequence Control.>

14) When the hydraulic unit begins to work, first the RR side performs decompression, hold and compression, and then the RL side performs decompression, hold and compression.

15) Read values indicated on the pressure gauge and check if the fluctuation of the values between decompression and compression meets specification. Depress the brake pedal and check that the kick-back is normal, and tightness is normal.

16) Disconnect the pressure gauge from the RL and RR caliper bodies.

17) Install the air bleeder screws of RL and RR caliper bodies.

18) Bleed air from the brake system. <Ref. to BR-54, Air Bleeding.>

2. CHECKING THE HYDRAULIC UNIT ABS OPERATION WITH THE BRAKE TESTER

1) Set wheels other than the one to measure on free rollers.

2) Prepare for the ABS sequence control operation. <Ref. to VDC-17, ABS Sequence Control.>

3) Set the front wheels or rear wheels on the brake tester (a) and set the gear to neutral.

Subaru Outback. Vehicle Dynamics Control (VDC)

4) Operate the brake tester.

5) Perform ABS sequence control. <Ref. to VDC-17, ABS Sequence Control.>

6) When the hydraulic unit begins to work, check the following work sequence.

  1. The FL wheel performs decompression, hold and compression in sequence, and subsequently the FR wheel repeats the cycle.
  2. The RR wheel performs decompression, hold and compression in sequence, and subsequently the RL wheel repeats the cycle.

7) Read values indicated on the brake tester and check if the fluctuation of the values between decompression and compression meets specification.

Subaru Outback. Vehicle Dynamics Control (VDC)

8) After the inspection, depress the brake pedal and check that it is not abnormally hard, and tightness is normal.

3. CHECKING THE HYDRAULIC UNIT VDC OPERATION USING A PRESSURE GAUGE

1) Lift up the vehicle, and then remove the wheel.

2) Remove the air bleeder screws from FL and FR caliper bodies.

3) Connect two pressure gauges to FL and FR caliper bodies.

CAUTION:

NOTE: Wrap sealing tape around the pressure gauge.

Subaru Outback. Vehicle Dynamics Control (VDC)

4) Bleed air from the pressure gauge.

5) Perform VDC sequence control. <Ref. to VDC-20, VDC Sequence Control.>

6) When the hydraulic unit begins to work, first the FL side performs compression, hold, and decompression, and then the FR side performs compression, hold, and decompression.

7) Read values indicated on the pressure gauge and check if the fluctuation of the values between decompression and compression meets specification. Depress the brake pedal and check that it is not abnormally hard, and tightness is normal.

Subaru Outback. Vehicle Dynamics Control (VDC)

8) Disconnect the pressure gauges from FL and FR caliper bodies.

9) Install the air bleeder screws of FL and FR caliper bodies.

10) Remove the air bleeder screws from RL and RR caliper bodies.

11) Connect two pressure gauges to RL and RR caliper bodies.

12) Bleed air from RL and RR caliper bodies, and pressure gauge.

13) Perform VDC sequence control. <Ref. to VDC-20, VDC Sequence Control.>

14) When the hydraulic unit begins to work, first the RR side performs compression, hold, and decompression, and then the RL side performs compression, hold, and decompression.

15) Read the values indicated on the pressure gauges and check if it is within specification. Depress the brake pedal and check that it is not abnormally hard, and tightness is normal.

16) Disconnect the pressure gauge from the RL and RR caliper bodies.

17) Install the air bleeder screws of RL and RR caliper bodies.

18) Bleed air from the brake system. <Ref. to BR-54, Air Bleeding.>

4. CHECK HYDRAULIC UNIT VDC OPERATION WITH BRAKE TESTER

1) Set wheels other than the one to measure on free rollers.

2) Prepare to operate the VDC sequence control. <Ref. to VDC-20, VDC Sequence Control.>

3) Set the front wheels or rear wheels on the brake tester (a) and set the gear to neutral.

Subaru Outback. Vehicle Dynamics Control (VDC)

4) Operate the brake tester.

5) Perform VDC sequence control. <Ref. to VDC-20, VDC Sequence Control.>

6) When the hydraulic unit begins to work, check the following work sequence.

  1. The FL wheel performs compression, hold and decompression in sequence, and subsequently the FR wheel repeats the cycle.
  2. The RR wheel performs compression, hold and decompression in sequence, and subsequently the RL wheel repeats the cycle.

7) Read values indicated on the brake tester and check if the fluctuation of the values between decompression and compression meets specification.

Subaru Outback. Vehicle Dynamics Control (VDC)

8) After the inspection, depress the brake pedal and check that it is not abnormally hard, and tightness is normal.

D: ADJUSTMENT

1. SET UP MODE FOR NEUTRAL OF STEERING ANGLE SENSOR & LATERAL G SENSOR 0 POINT

After installing, replacing, or adjusting the following part, perform the Set up mode for Neutral of Steering Angle Sensor & Lateral G Sensor 0 point.

1) Set the steering wheel to the neutral position.

2) Connect the Subaru Select Monitor to data link connector.

  1. Run the "PC application for Subaru Select Monitor".
  2. On "Main Menu" display, select {Each System Check}.
  3. Select {Brake Control System}. When {VDC} is displayed, select the [OK] button.
  4. From {Current Data Display & Save}, select {Steer Angle Sensor Op}.

3) Check that the steering angle sensor output value is between -10 and 10 deg.

4) From {Function Check Sequence}, select {Set up mode for Neutral of Steering Angle Sensor & Lateral G Sensor 0 point}, and perform the setting according to the procedure displayed on the Subaru Select Monitor Screen.

5) Drive the vehicle for 10 minutes, and check that there is no system malfunction or the warning light illumination while driving.

6) Make sure that the DTC is not stored.

2. LONGITUDINAL G SENSOR & LATERAL G SENSOR 0 POINT SETTING MODE

After installing or replacing the following part, perform the longitudinal G sensor & lateral G sensor 0 point setting mode.

1) Park the vehicle on a level surface with all wheels aligned straight.

2) Connect the Subaru Select Monitor to data link connector.

  1. Run the "PC application for Subaru Select Monitor".
  2. On "Main Menu" display, select {Each System Check}.
  3. Select {Brake Control System}. When {VDC} is displayed, select the [OK] button.
  4. From {Current Data Display & Save}, select {Longitudinal G Sensor Output} and {Lateral G Sensor Output}.

3) Check that output values for the longitudinal G sensor and lateral G sensor are -2 - 2 m/s2.

4) From {Function Check Sequence}, select {Longitudinal G Sensor & Lateral G Sensor 0 Point Setting Mode}, and perform the setting according to the procedure displayed on the Subaru Select Monitor Screen.

5) Drive the vehicle for 10 minutes, and check that there is no system malfunction or the warning light illumination while driving.

6) Make sure that the DTC is not stored.

READ NEXT:

 ABS Sequence Control

A: OPERATION 1) While the ABS sequence control is being performed, the operation of the hydraulic unit can be checked using the brake tester or pressure gauge after the hydraulic unit solenoid valve

 Yaw Rate and G Sensor

A: NOTE Yaw rate & longitudinal G and lateral G sensor are integrated with the VDC control module & hydraulic control module (VDCCM&H/U). B: INSPECTION 1. YAW RATE & LONGITUDINAL G AN

 Front ABS Wheel Speed Sensor

A: REMOVAL 1) Disconnect the ground cable from battery. 2) Lift up the vehicle, and then remove the front wheels. 3) Remove the front ABS wheel speed sensor. CAUTION: Be careful not to damage the

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