Vehicle Dynamics Control System (Diagnostics) (Except Wrx): Other Subaru XV GP

PROCEDURE

Note. To check the harness for open or short circuits, shake problem spot or connector. Refer to "Check List for Interview". CHECK LIST FOR INTERVIEW. >

CHECK

Check the following item about the vehicle's state.

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SUPPLEMENTAL RESTRAINT SYSTEM "AIRBAG"

Airbag system wiring harness is routed near the ABS wheel speed sensor and VDCCM&H/U.

BATTERY

Measure the battery voltage and check electrolyte.

Standard voltage: 12 V or more

Specific gravity: 1.260 or more

GROUND

Check the tightening torque of ground (GB-5) bolt of VDC.

Tightening torque: 13 N.m (1.3 kgf-m, 9.6 ft-lb)

HYDRAULIC UNIT

Check the hydraulic unit.

1. When using the brake tester < Refer to «CHECKING THE HYDRAULIC UNIT ABS OPERATION WITH THE BRAKE TESTER»(ref-560389-S31056511052013061300000) , INSPECTION, VDC Control Module and Hydraulic Control Unit (VDCCM&H/U). >
2. When not using the brake tester < Refer to «CHECKING THE HYDRAULIC UNIT ABS OPERATION BY PRESSURE GAUGE»(ref-560389-S22592323932013061300000) , INSPECTION, VDC Control Module and Hydraulic Control Unit (VDCCM&H/U). >

BRAKE DRAG

Check for brake drag.

BRAKE PAD AND ROTOR

Check the brake pad and rotor.

1. Front < Refer to «INSPECTION»(ref-560364-S32738095282013061300000) , Front Brake Pad. > < Refer to «INSPECTION»(ref-560364-S25208074652013061300000) , Front Disc Rotor. >
2. Rear < Refer to «INSPECTION»(ref-560364-S00847442602013061300000) , Rear Brake Pad. > < Refer to BR-34, INSPECTION, Rear Disc Rotor. >

TIRES

Check the tire specifications, tire wear and air pressure. < Refer to SPECIFICATION , General Description. >

GENERAL TOOL

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Note. Terminal numbers in VDCCM&H/U connector are shown in the figure. When the connector is removed from the VDCCM&H/U, the brake warning light (EBD warning light), ABS warning light, VDC warning light & VDC indicator light, VDC OFF indicator light, and the hill start assist warning light illuminate.

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1. Prepare the Subaru Select Monitor kit. < Refer to «SPECIAL TOOL»(ref-560382-S10484198622013061300000) , PREPARATION TOOL, General Description. >
2. Prepare PC with Subaru Select Monitor installed.
3. Connect the USB cable to SDI (Subaru Diagnosis Interface) and USB port on the personal computer (dedicated port for the Subaru Select Monitor). NOTE: The dedicated port for the Subaru Select Monitor means the USB port which was used to install the Subaru Select Monitor.
4. Connect the diagnosis cable to SDI.
5. Connect SDI to data link connector located in the lower portion of the instrument panel (on the driver's side). CAUTION: Do not connect scan tools other than the Subaru Select Monitor.
6. Start the PC.
7. Turn the ignition switch to ON (engine OFF) and run the "PC application for Subaru Select Monitor". NOTE: For detailed operation procedures, refer to "PC application help for Subaru Select Monitor".
8. If VDC and Subaru Select Monitor cannot communicate, check the communication circuit. < Refer to «COMMUNICATION FOR INITIALIZING IMPOSSIBLE»(ref-560382-S26512583012013061300000) , INSPECTION, Subaru Select Monitor. >
9. Record the DTC and data.

READ CURRENT DATA

1. On «Main Menu» display, select {Each System Check}.
2. On «System Selection Menu» display, select {Brake Control System}.
3. When {VDC} is displayed, select the [OK] button.
4. On «Brake Control Diagnosis» display, select {Current Data Display & Save}.
5. On «Data Display Menu» display, select the data display method.
6. Using the scroll key, scroll the display screen up or down until necessary data is shown.

1. A list of the support data is shown in the following table. Display Contents to be displayed Unit of measure FR Wheel Speed Wheel speed detected by front ABS wheel speed sensor RH is displayed. km/h or MPH FL Wheel Speed Wheel speed detected by front ABS wheel speed sensor LH is displayed. km/h or MPH RR Wheel Speed Wheel speed detected by rear ABS wheel speed sensor RH is displayed. km/h or MPH RL Wheel Speed Wheel speed detected by rear ABS wheel speed sensor LH is displayed. km/h or MPH Steering Angle Sensor Steering angle detected by steering angle sensor is displayed. deg Yaw Rate Sensor Vehicle angular speed detected by yaw rate sensor is displayed. deg/s Pressure Sensor Brake fluid pressure detected by pressure sensor is displayed. bar Longitudinal G Sensor Vehicle longitudinal acceleration detected by longitudinal G sensor is displayed. m/s 2 Lateral G Sensor Vehicle lateral acceleration detected by lateral G sensor is displayed. m/s 2 Voltage of IGN Voltage supplied to VDCCM&H/U is displayed. V M. Relay monitor Voltage Voltage applied to the motor relay is displayed. V Motor Relay Signal Motor relay operation signal is displayed. ON or OFF Valve Relay Signal Valve relay operation signal is displayed. ON or OFF EBD Warning Light ON operation of the EBD warning light is displayed. ON or OFF ABS Warning Lamp ON operation of the ABS warning light is displayed. ON or OFF VDC Warning Lamp ON operation of the VDC warning light is displayed. ON or OFF EBD Control Flag EBD operation condition is displayed. ON or OFF ABS Control Flag ABS operation condition is displayed. ON or OFF TCS Control Flag TCS operation condition is displayed. ON or OFF VDC Control Flag VDC operation condition is displayed. ON or OFF E/G Control Stop Flag Engine control command signal is displayed. 1 or 0 VDC-OFF Light ON/OFF condition of VDC OFF indicator light is displayed. ON or OFF OFF SW Signal Operation condition of VDC OFF switch is displayed. ON or OFF Brake Light Switch Brake ON/OFF is displayed. ON or OFF Clutch Switch Clutch ON/OFF is displayed. (For MT model only. Fixed to OFF on AT model.) ON or OFF Reverse Signal Reverse gear ON/OFF is displayed. (For MT model only. Fixed to OFF on AT model.) ON or OFF NOTE: For detailed operation procedures, refer to "PC application help for Subaru Select Monitor".

FUNCTION CHECK

FREEZE FRAME DATA

Note. Data stored at the time of trouble occurrence is shown on display. Each time a trouble occurs, the latest information is stored in the freeze frame data in memory. If a freeze frame data is not properly stored in memory (due to a drop in VDCCM power supply, etc.), a DTC suffixed with a question mark "?" appears on the Subaru Select Monitor display. This shows it may be an unreliable reading.

PARAMETER SELECTION

Note. When the VDCCM&H/U is replaced with a replacement part, be sure to perform the parameter selection/registration to the VDCCM&H/U using this function. To confirm the applied model, refer to the "model number plate" attached on the vehicle. < Refer to IDENTIFICATION , Identification. > When the applied model is entered wrong, re-entry is possible. When the registration has not been performed, the DTC code "Parameter" is detected together with the ABS/EBD/VDC warning light illumination.

1. Connect the Subaru Select Monitor.
2. On «Main Menu» display, select {Each System Check}.
3. On «System Selection Menu» display, select {Brake Control System}.
4. When {VDC} is displayed, select the [OK] button.
5. On «Brake Control Diagnosis» display, select {Work Support}.
6. On «Work Support» display, select {Select Parameter}.
7. Check the applied model and option code indicated in the "Model number plate". < Refer to «IDENTIFICATION»(ref-560349-S29965919652013061300000) , Identification. >
8. Enter the applied model of 7-digit alphanumeric characters and press the [Enter] key.
9. When the option code input screen appears after entering the applied model, enter the option code consisting of 4-digit alphanumeric characters, and press the [Enter] key When the option code is 3 digits, add "0" (zero) in front and enter the code as 4 digits.
10. When the confirmation screen indicating the vehicle information appears, check that the correct applied model and grade are displayed and click the [OK] button. NOTE: When the displayed applied model and grade are different from those of the vehicle, perform registration operations again after clicking the [OK] button.
11. Execute the Clear Memory Mode after parameter selection and registration operations because the DTC for "Parameter selection error" is memorized. < Refer to «CLEAR MEMORY MODE»(ref-560382-S12286105572013061300000) . >

PARAMETER CHECK

Note. The parameter data registered in the VDCCM is shown on the display.

1. Connect the Subaru Select Monitor.
2. On «Main Menu» display, select {Each System Check}.
3. On «System Selection Menu» display, select {Brake Control System}.
4. When {VDC} is displayed, select the [OK] button.
5. On «Brake Control Diagnosis» display, select {Work Support}.
6. On «Work Support» display, select {Confirm on parameter}.
7. On the {Confirm on parameter} display screen, check that the applied model and grade of the target vehicle are included, and click the [OK] button.
8. 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". < Refer to «PARAMETER SELECTION»(ref-560382-S21820547042013061300000) , OPERATION, Subaru Select Monitor. >

DETECTING CONDITION

Defective harness connector

Reproduce the malfunction occurrence condition as much as possible.

Drive the vehicle at least ten minutes.

Note. Make sure the vehicle is not dragged to one side under usual driving condition.

Defective combination meter

Defective combination meter

1. Defective combination meter
2. Defective CAN communication

1. Defective combination meter
2. Defective engine
3. Defective CAN communication

1. Defective combination meter
2. Defective CAN communication
3. VDC OFF switch is shorted.

1. Defective combination meter
2. Defective CAN communication

1. Brake warning light circuit is shorted.
2. Defective sensor/connector
3. Defective CAN communication

LIST

Illumination condition

While the vehicle speed is 10 km/h (6 MPH) or above, and the clutch switch signal ON (depressed) condition continues five minutes or more, if the vehicle speed lowers to 10 km/h (6 MPH) or below, the module judge as abnormal (clutch switch stuck ON), and then turn on the warning light.

Turning off condition

If the clutch switch signal OFF (foot released) condition continues for 2 second, the module turns off the warning light.

The hill start assist function does not operate, while the warning light illuminates.