Vehicle Dynamics Control (Vdc): Other Subaru Forester SH рестайлинг

CAUTION

1. Wear appropriate work clothing, including a cap, protective goggles and protective shoes when performing any work.
2. Remove contamination including dirt and corrosion before removal, installation or disassembly.
3. Keep the disassembled parts in order and protect them from dust and dirt.
4. Before disconnecting connectors of sensors or units, be sure to disconnect the ground cable from battery.
5. Before removal, installation or disassembly, be sure to clarify the failure. Avoid unnecessary removal, installation, disassembly and replacement.
6. Vehicle components are extremely hot after driving. Be wary of receiving burns from heated parts.
7. Be sure to tighten fasteners including bolts and nuts to the specified torque.
8. Place shop jacks or rigid racks at the specified points.

GENERAL TOOL

GENERAL TOOL DESCRIPTION CHART

Scheme 60

Scheme 61

1. Disconnect the ground cable from battery.
2. Use compressed air to remove moisture and dust around the VDCCM&H/U. NOTE: If the terminals become dirty, it may cause improper contact.
3. Lift the lock lever and Disconnect the VDCCM&H/U connector. CAUTION: Do not pull on the harness when disconnecting the connector.
4. Disconnect the brake pipes from the VDCCM&H/U.
5. Wrap the brake pipe with a vinyl bag so as not to spill the brake fluid on the vehicle body. CAUTION: If brake fluid is spilled on the vehicle body, wash it off immediately with water and wipe clean.
6. Remove the nuts and remove the VDCCM&H/U. CAUTION: Do not drop or bump the VDCCM&H/U. Do not turn the VDCCM&H/U upside down or place it sideways for storage. Be careful not to let foreign matter enter the VDCCM&H/U. Be careful that no water enters the connectors.
7. Remove the VDCCM&H/U bracket.

Scheme 62

Scheme 63

1. Install the VDCCM&H/U bracket. Tightening torque: 33 N.m (3.36 kgf-m, 24.3 ft-lb)
2. Install the VDCCM&H/U with a new nut (Part No. 023506000) by aligning the damper groove of the VDCCM&H/U to the bracket side claw. Tightening torque: 7.5 N.m (0.76 kgf-m, 5.5 ft-lb)
3. Connect the brake pipes to their correct VDCCM&H/U positions. Tightening torque: T1: 15 N.m (1.53 kgf-m, 11.1 ft-lb) T2: 19 N.m (1.94 kgf-m, 14 ft-lb)
4. Connect the VDCCM&H/U connector. NOTE: Be sure to remove all foreign matter from inside the connector before connecting. Make sure the VDCCM&H/U connector is securely locked.
5. Bleed air from the brake system. < Ref. to «PROCEDURE»(ref-465400-S28290080402012042000000) , Air Bleeding. >
6. Check the parameter to confirm that the applied models and grades of the relevant vehicle are included. < Ref. to «PARAMETER CHECK»(ref-465420-S39279974242012042000000) , OPERATION, Subaru Select Monitor. >
7. 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 «PARAMETER SELECTION»(ref-465420-S32718710582012042000000) , OPERATION, Subaru Select Monitor. > NOTE: When the VDCCM&H/U is replaced with a new part, be sure to perform the selection. registration operation. For the selection and registration of parameter, the Subaru Select Monitor is required. When the registration has not been performed, the DTC code "Parameter selection error" is detected together with the ABS/EBD/VDC warning light illumination.

Scheme 64

1. Check the condition of connection and settlement of connector.
2. Check the mark used for VDCCM&H/U identification. Refer to "SPECIFICATION" for identification mark. < Ref. to «SPECIFICATION»(ref-465437-S29271424922012042000000) , General Description. >

Scheme 65

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: Use a pressure gauge used exclusively for brake fluid measurement. Do not use the pressure gauge used for the measurement of transmission oil. Doing so will cause the piston seal to expand and deform. NOTE: Wrap sealing tape around the pressure gauge.
4. Bleed air from the pressure gauges and the FL and FR caliper bodies.
5. Perform ABS sequence control. < Ref. to «ABS SEQUENCE CONTROL»(ref-465437-S01812074852012042000000) . >
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. WHEEL SPECIFICATION CHART Front wheel Rear wheel Initial value 3, 500 kPa (36 kgf/cm 2 , 511 psi) 3, 500 kPa (36 kgf/cm 2 , 511 psi) When depressurized 500 kPa (5 kgf/cm 2 , 73 psi) or less 500 kPa (5 kgf/cm 2 , 73 psi) or less When pressurized 3, 500 kPa (36 kgf/cm 2 , 511 psi) or more 3, 500 kPa (36 kgf/cm 2 , 511 psi) or more
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 the brake system. < Ref. to «PROCEDURE»(ref-465400-S28290080402012042000000) , Air Bleeding. >
13. Bleed air from RL and RR caliper bodies, and pressure gauge.
14. Perform ABS sequence control. < Ref. to «ABS SEQUENCE CONTROL»(ref-465437-S01812074852012042000000) . >
15. 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.
16. 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.
17. Disconnect the pressure gauge from the RL and RR caliper bodies.
18. Install the air bleeder screws of RL and RR caliper bodies.
19. Bleed air from the brake system. < Ref. to «PROCEDURE»(ref-465400-S28290080402012042000000) , Air Bleeding. >

Scheme 66

Scheme 67

1. Set wheels other than the one to measure on free rollers.
2. Prepare for the ABS sequence control operation. < Ref. to «ABS SEQUENCE CONTROL»(ref-465437-S01812074852012042000000) . >
3. Set the front wheels or rear wheels on the brake tester and set the gear to neutral.
4. Operate the brake tester.
5. Perform ABS sequence control. < Ref. to «ABS SEQUENCE CONTROL»(ref-465437-S01812074852012042000000) . >
6. When the hydraulic unit begins to work, check the following work sequence. The FL wheel performs decompression, hold and compression in sequence, and subsequently the FR wheel repeats the cycle. 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. WHEEL SPECIFICATION CHART Front wheel Rear wheel Initial value 1, 000 N (102 kgf, 225 lb) 1, 000 N (102 kgf, 225 lb) When depressurized 500 N (51 kgf, 112 1b) or less 500 N (51 kgf, 112 lb) or less When pressurized 1, 000 N (102 kgf, 225 lb) or more 1, 000 N (102 kgf, 225 lb) or more
8. After the inspection, depress the brake pedal and check that it is not abnormally hard, and tightness is normal.

Scheme 68

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: Use a pressure gauge used exclusively for brake fluid measurement. Do not use a pressure gauge used for the measuring transmission oil pressure, as the piston seal may expand and deform. NOTE: Wrap sealing tape around the pressure gauge.
4. Bleed air from the pressure gauge.
5. Perform VDC sequence control. < Ref. to «VDC SEQUENCE CONTROL»(ref-465437-S39793392662012042000000) . >
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. WHEEL SPECIFICATION CHART Front wheel Rear wheel When pressurized 3, 000 kPa (31 kgf/cm 2 , 441 psi) or more 3, 000 kPa (31 kgf/cm 2 , 441 psi) or more When depressurized 500 kPa (5 kgf/cm 2 , 73 psi) or less 500 kPa (5 kgf/cm 2 , 73 psi) or less
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 SEQUENCE CONTROL»(ref-465437-S39793392662012042000000) . >
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 «PROCEDURE»(ref-465400-S28290080402012042000000) , Air Bleeding. >

Scheme 69

Scheme 70

1. Set wheels other than the one to measure on free rollers.
2. Prepare to operate the VDC sequence control. < Ref. to «VDC SEQUENCE CONTROL»(ref-465437-S39793392662012042000000) . >
3. Set the front wheels or rear wheels on the brake tester and set the gear to neutral.
4. Operate the brake tester.
5. Perform VDC sequence control. < Ref. to «VDC SEQUENCE CONTROL»(ref-465437-S39793392662012042000000) . >
6. When the hydraulic unit begins to work, check the following work sequence. The FL wheel performs compression, hold and decompression in sequence, and subsequently the FR wheel repeats the cycle. 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. WHEEL SPECIFICATION CHART Front wheel Rear wheel When pressurized 2, 000 N (204 kgf, 450 lbf) or more 2, 000 N (204 kgf, 450 lbf) or more When depressurized 500 N (51 kgf, 112 lbf) or less 500 N (51 kgf, 112 lbf) or less
8. After the inspection, depress the brake pedal and check that it is not abnormally hard, and tightness is normal.

ABS SEQUENCE CONTROL WITH SUBARU SELECT MONITOR

Note. In the event of any trouble, the ABS sequence control will not operate.

1. Connect the Subaru Select Monitor to data link connector under the driver's side instrument panel lower cover.
2. Turn the ignition switch to ON.
3. Run the "PC application for Subaru Select Monitor".
4. Set the Subaru Select Monitor to "Brake Control System" mode.
5. When the "Function Check Sequence" is selected, the "ABS sequence control" will start.
6. Execute the following operations when the message "Press the brake pedal so that the brake pedal force is between 100 and 150 kgf is displayed". When using a brake tester, press the brake pedal pad with a force of 1, 000 N (102 kgf, 225 lbf). When using a pressure gauge, press the brake pedal so that the pressure gauge indicates 3, 500 kPa (36 kgf/cm 2 , 511 psi).
7. Press "OK" after "Press OK" is displayed.
8. The brake system being operated is displayed on the Subaru Select Monitor.

Scheme 71

Note. The control operation starts at point A.

CONDITIONS FOR COMPLETION OF ABS SEQUENCE CONTROL

When the following conditions develop, the ABS sequence control stops and ABS operation is returned to the normal control mode.

1. When the speed of at least one wheel reaches 10 km/h (6 MPH).
2. When the brake pedal is released during ABS sequence control and the stop light switch is becomes OFF.
3. After completion of ABS sequence control.
4. When a malfunction is detected.

VDC SEQUENCE CONTROL WITH SUBARU SELECT MONITOR

Note. In the event of any trouble, sequence control will not operate.

1. Connect the Subaru Select Monitor to data link connector under the driver's side instrument panel lower cover.
2. Turn the ignition switch to ON.
3. Run the "PC application for Subaru Select Monitor".
4. Set the Subaru Select Monitor to "Brake Control System" mode.
5. When the "VDC Inspection Mode" is selected from the "Function Check Sequence" menu, the "VDC sequence control" will start.
6. Press "OK" after "Press OK" is displayed.
7. Operation points will be displayed on Subaru Select Monitor.

Scheme 72

Note. The control operation starts at point A.

CONDITIONS FOR COMPLETION OF VDC SEQUENCE CONTROL

When the following conditions develop, the VDC sequence control stops and VDC operation is returned to the normal control mode.

1. When the speed of at least one wheel reaches 10 km/h (6 MPH).
2. When the brake pedal is pressed during sequence control and the stop light switch is set to ON.
3. After completion of VDC sequence control.
4. When a malfunction is detected.

Scheme 73

1. Disconnect the ground cable from battery.
2. Remove the console box. < Ref. to «CONSOLE BOX»(ref-465406-S22345520842012042000000) . >
3. Disconnect the connector from yaw rate & G sensor.
4. Remove the nut and remove the yaw rate & G sensor. CAUTION: Do not drop or hit the yaw rate & G sensor.

YAW RATE & G SENSOR SIGNAL

DIAGNOSIS PROCEDURE

CHECK WITH SUBARU SELECT MONITOR

1. Connect the Subaru Select Monitor to the data link connector.
2. Select {Current Data Display & Save}. Check if the speed indicated on the display changes in the same manner as the speedometer reading during acceleration/deceleration when the steering wheel is in the straight-ahead position.
3. If the speed indicated on the display does not change, check the ABS wheel speed sensor. < Ref. to «ABS WHEEL SPEED SENSOR»(ref-465437-S41968105402012042000000) , INSPECTION, Front ABS Wheel Speed Sensor. >

Scheme 74

1. Check the tip of the ABS wheel speed sensor for foreign particles or damage. If necessary, clean the tip or replace the ABS wheel speed sensor.
2. Check the ABS wheel speed sensor cable for discontinuity. If defective, replace the ABS wheel speed sensor.
3. Connect a 12 V power supply to No. 2 terminal of sensor connector as shown in the illustration, then attach resistance to the No. 1 terminal. Rotate the wheel at about 2.75 km/h (2 MPH), and measure the voltage using an oscilloscope. Standard value of output voltage: 0.7 - 1.4 V
4. Replace the ABS wheel speed sensor if the inspection result is not within the standard value.

Scheme 75

Scheme 76

Scheme 77

Scheme 78

1. Disconnect the ground cable from battery.
2. Disconnect the connector from the rear ABS wheel speed sensor.
3. Remove the sensor harness clamp of the rear sub frame.
4. Remove the bolts and then remove the sensor harness bracket from the upper arm.
5. Remove the bolts, and remove the rear ABS wheel speed sensor from the rear axle. CAUTION: Be careful not to damage the sensor. Do not apply excessive force to the sensor harness.

ABS WHEEL SPEED SENSOR

Refer to "INSPECTION" in "Front ABS Wheel Speed Sensor". < Ref. to ABS WHEEL SPEED SENSOR , INSPECTION, Front ABS Wheel Speed Sensor. >