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Contents Section: Anti-Lock/traction Control All sections

Vehicle Dynamics Control (Vdc) System (Diagnostics): Diagnosis Subaru Outback BR рестайлинг

Anti-Lock/traction Control ~1069 words

INSPECTION

Before performing diagnosis, check the following items which might affect VDC problems.

TROUBLE SYMPTOM

Communication is impossible between VDC and Subaru Select Monitor.

When the ignition switch is turned to ON (engine OFF), ABS warning light, VDC OFF indicator light, and VDC warning light & VDC indicator light do not illuminate.

Note. When pressing the VDC OFF switch for 10 seconds or more, the VDC OFF indicator light goes off and cannot operate any more. When turning the ignition switch from OFF to ON, the OFF operation enabled status is restored.

StepCheckYesNo
1 CHECK OTHER INDICATOR LIGHT. Turn the ignition switch to ON.Does other indicator light illuminate soon after "ON"?Go to step 2 .Perform the self-diagnosis of combination meter. < Refer to SELF-DIAGNOSIS DISPLAY MODE , OPERATION, Combination Meter System. >
2 CHECK LAN SYSTEM. Perform the diagnosis for LAN system. < Refer to BASIC DIAGNOSTIC PROCEDURE . >Is there any fault in LAN system?Perform the diagnosis according to DTC for LAN system. < Refer to LIST OF DIAGNOSTIC TROUBLE CODE (DTC) . >Go to step 3 .
3 CHECK VDCCM. When the engine does not start, display the current data of VDCCM using Subaru Select Monitor.Is the «EBD Warning Light» output ON?Go to step 4 .Replace the VDCCM&H/U. < Refer to VDC CONTROL MODULE AND HYDRAULIC CONTROL UNIT (VDCCM&H/U) . >
4 CHECK VDCCM. When the engine does not start, display the current data of VDCCM using Subaru Select Monitor.Is the «ABS Warning Light» output ON?Go to step 5 .Replace the VDCCM&H/U. < Refer to VDC CONTROL MODULE AND HYDRAULIC CONTROL UNIT (VDCCM&H/U) . >
5 CHECK VDCCM. When the engine does not start, display the current data of VDCCM using Subaru Select Monitor.Is the «VDC Warning Light» output ON?Go to step 6 .Replace the VDCCM&H/U. < Refer to VDC CONTROL MODULE AND HYDRAULIC CONTROL UNIT (VDCCM&H/U) . >
6 CHECK COMBINATION METER. Check the combination meter. < Refer to SELF-DIAGNOSIS DISPLAY MODE , OPERATION, Combination Meter System. >Is combination meter OK?Replace the VDCCM&H/U. < Refer to VDC CONTROL MODULE AND HYDRAULIC CONTROL UNIT (VDCCM&H/U) . >Replace the combination meter. < Refer to COMBINATION METER . >

When starting the engine, the ABS warning light is kept ON.

StepCheckYesNo
1 READ DTC. Read the DTC. < Refer to READ DIAGNOSTIC TROUBLE CODE (DTC) . >Is DTC displayed?Perform the diagnosis according to DTC. < Refer to LIST OF DIAGNOSTIC TROUBLE CODE (DTC) . >Go to step 2 .
2 CHECK LAN SYSTEM. Perform the diagnosis for LAN system. < Refer to BASIC DIAGNOSTIC PROCEDURE . >Is there any fault in LAN system?Perform the diagnosis according to DTC for LAN system. < Refer to LIST OF DIAGNOSTIC TROUBLE CODE (DTC) . >Go to step 3 .
3 CHECK COMBINATION METER. Check the combination meter. < Refer to SELF-DIAGNOSIS DISPLAY MODE , OPERATION, Combination Meter System. >Is combination meter OK?Replace the VDCCM&H/U. < Refer to VDC CONTROL MODULE AND HYDRAULIC CONTROL UNIT (VDCCM&H/U) . >Replace the combination meter. < Refer to COMBINATION METER . >

When starting the engine, the VDC warning light & VDC indicator light remains lit.

StepCheckYesNo
1 READ DTC. Read the DTC. < Refer to READ DIAGNOSTIC TROUBLE CODE (DTC) . >Is DTC displayed?Perform the diagnosis according to DTC. < Refer to LIST OF DIAGNOSTIC TROUBLE CODE (DTC) . >Go to step 2 .
2 CHECK ENGINE.Does the malfunction indicator light illuminate?Repair the engine. < Refer to READ DIAGNOSTIC TROUBLE CODE (DTC) . > < Refer to READ DIAGNOSTIC TROUBLE CODE (DTC) . >Go to step 3 .
3 CHECK ENGINE COOLANT TEMPERATURE. Warm up the engine, and check if the VDC warning light & VDC indicator light illumination condition changes.When the engine coolant temperature is too low, the VDC warning light & VDC indicator light illuminates. Do the lights go off when the engine is warmed up?Normal If DTC is recorded, clear the memory. < Refer to CLEAR MEMORY MODE . >Go to step 4 .
4 CHECK LAN SYSTEM. Perform the diagnosis for LAN system. < Refer to BASIC DIAGNOSTIC PROCEDURE . >Is there any fault in LAN system?Perform the diagnosis according to DTC for LAN system. < Refer to LIST OF DIAGNOSTIC TROUBLE CODE (DTC) . >Go to step 5 .
5 CHECK COMBINATION METER. Check the combination meter. < Refer to SELF-DIAGNOSIS DISPLAY MODE , OPERATION, Combination Meter System. >Is combination meter OK?Replace the VDCCM&H/U. < Refer to VDC CONTROL MODULE AND HYDRAULIC CONTROL UNIT (VDCCM&H/U) . >Replace the combination meter. < Refer to COMBINATION METER . >

When starting the engine, VDC OFF indicator light is kept ON.

Note. When pressing the VDC OFF switch for 10 seconds or more, the VDC OFF indicator light goes off and cannot operate any more. When turning the ignition switch from OFF to ON, the OFF operation enabled status is restored.

StepCheckYesNo
1 READ DTC. Read the DTC. < Refer to READ DIAGNOSTIC TROUBLE CODE (DTC) . >Is DTC displayed?Perform the diagnosis according to DTC. < Refer to LIST OF DIAGNOSTIC TROUBLE CODE (DTC) . >Go to step 2 .
2 CHECK VDC OFF SWITCH. Remove and check VDC OFF switch. < Refer to VDC OFF SWITCH . >Is the VDC OFF switch normal?Go to step 3 .Replace the VDC OFF switch.
3 CHECK LAN SYSTEM. Perform the diagnosis for LAN system. < Refer to BASIC DIAGNOSTIC PROCEDURE . >Is there any fault in LAN system?Perform the diagnosis according to DTC for LAN system. < Refer to LIST OF DIAGNOSTIC TROUBLE CODE (DTC) . >Go to step 4 .
4 CHECK COMBINATION METER. Check the combination meter. < Refer to SELF-DIAGNOSIS DISPLAY MODE , OPERATION, Combination Meter System. >Is combination meter OK?Replace the VDCCM&H/U. < Refer to VDC CONTROL MODULE AND HYDRAULIC CONTROL UNIT (VDCCM&H/U) . >Replace the combination meter. < Refer to COMBINATION METER . >

After starting the engine, the brake warning light remains lit though the parking lever is released.

Note. When brake warning light blinks, check the parking brake system. < Refer to BASIC DIAGNOSTIC PROCEDURE . >

DTC DETECTING CONDITION

  1. Defective ABS wheel speed sensor (broken wire, input voltage too high)
  2. Defective harness connector
  1. ABS does not operate.
  2. VDC does not operate.
  3. Hill start assist does not operate.
  4. EyeSight does not operate. (EyeSight model only)

DIAGNOSTIC PROCEDURE

StepCheckYesNo
1 CHECK POOR CONTACT OF CONNECTOR. Check if there is poor contact between VDCCM&H/U and ABS wheel speed sensor.Is there poor contact?Repair the connector.Go to step 2 .
2 CHECK HARNESS CONNECTOR BETWEEN VDCCM&H/U AND ABS WHEEL SPEED SENSOR. Disconnect the connector (B310) from the VDCCM&H/U. Disconnect the connector from ABS wheel speed sensor. Measure the resistance between VDCCM&H/U connector and ABS wheel speed sensor connector. Connector & terminal DTC C0021 (B310) No. 18 - (B6) No. 1: (B310) No. 19 - (B6) No. 2: DTC C0023 (B310) No. 22 - (B15) No. 1: (B310) No. 21 - (B15) No. 2: DTC C0025 (B310) No. 25 - (R72) No. 1: (B310) No. 24 - (R72) No. 2: DTC C0027 (B310) No. 15 - (R73) No. 1: (B310) No. 16 - (R73) No. 2Is the resistance less than 1 ohms?Go to step 3 .Repair the harness connector between VDCCM&H/U and ABS wheel speed sensor.
3 CHECK GROUND SHORT OF HARNESS. Measure the resistance between VDCCM&H/U connector and chassis ground. Connector & terminal DTC C0021 (B310) No. 19 - Chassis ground: DTC C0023 (B310) No. 21 - Chassis ground: DTC C0025 (B310) No. 25 - Chassis ground: DTC C0027 (B310) No. 15 - Chassis groundIs the resistance 1 Mohms or more?Go to step 4 .Repair the harness connector between VDCCM&H/U and ABS wheel speed sensor.
4 CHECK ABS WHEEL SPEED SENSOR POWER SUPPLY CIRCUIT. Connect the VDCCM&H/U connector. Turn the ignition switch to ON. Measure the voltage between ABS wheel speed sensor connector and chassis ground. Connector & terminal DTC C0021 (B6) No. 1 (+) - Chassis ground (-): DTC C0023 (B15) No. 1 (+) - Chassis ground (-): DTC C0025 (R72) No. 2 (+) - Chassis ground (-): DTC C0027 (R73) No. 2 (+) - Chassis ground (-)Is the voltage 5 - 16 V?Go to step 6 .Go to step 5 .
5 CHECK VDCCM&H/U POWER SUPPLY CIRCUIT. Turn the ignition switch to OFF. Disconnect the VDCCM&H/U connector. Turn the ignition switch to ON. Measure the voltage between VDCCM&H/U connector terminals. Connector & terminal (B310) No. 7 (+) - (B310) No. 13 (-): (B310) No. 14 (+) - (B310) No. 13 (-): (B310) No. 1 (+) - (B310) No. 13 (-)Is the voltage 10 - 15 V?Go to step 6 .Check the generator, battery and VDCCM&H/U power supply circuit.
6 CHECK ABS WHEEL SPEED SENSOR SIGNAL. Install the ABS wheel speed sensor. Prepare an oscilloscope. Check the ABS wheel speed sensor. < Refer to CHECK ABS WHEEL SPEED SENSOR UNIT , INSPECTION, Front ABS Wheel Speed Sensor. >Does the oscilloscope indicate the waveform pattern as shown in the figure?Go to step 7 .Replace the ABS wheel speed sensor. < Refer to FRONT ABS WHEEL SPEED SENSOR . >
7 CHECK VDCCM&H/U. Connect all connectors. Clear the memory. < Refer to CLEAR MEMORY MODE . > Perform the Inspection Mode. < Refer to INSPECTION MODE . > Read the DTC.Is the same DTC displayed?Replace the VDCCM&H/U. < Refer to VDC CONTROL MODULE AND HYDRAULIC CONTROL UNIT (VDCCM&H/U) . >Go to step 8 .
8 CHECK OTHER DTC DETECTION.Is any other DTC displayed?Perform the diagnosis according to DTC. < Refer to LIST OF DIAGNOSTIC TROUBLE CODE (DTC) . >It results from a temporary noise interference.

DIAGNOSTIC PROCEDURE

  1. Defective ABS wheel speed sensor signal (noise, irregular signal, etc.)
  2. Defective harness connector
  1. ABS does not operate.
  2. VDC does not operate.
  3. Hill start assist does not operate.
  4. EyeSight does not operate. (EyeSight model only)
StepCheckYesNo
1 CHECK OUTPUT OF ABS WHEEL SPEED SENSOR USING SUBARU SELECT MONITOR. Select "Current Data Display & Save" on the Subaru Select Monitor. Read the defective ABS wheel speed sensor output.Does the speed indicated on the display change in response to the speedometer reading during acceleration/deceleration when the steering wheel is in the straight-ahead position?Go to step 2 .Go to step 7 .
2 CHECK POOR CONTACT OF CONNECTOR. Turn the ignition switch to OFF.Is there poor contact of connectors between VDCCM&H/U and ABS wheel speed sensor?Repair the connector.Go to step 3 .
3 CHECK CAUSE OF SIGNAL NOISE. Make sure the radio wave devices and electronic components are installed correctly.Are the radio wave devices and electronic components installed correctly?Go to step 4 .Install the radio wave devices and electronic components properly.
4 CHECK CAUSE OF SIGNAL NOISE. Check if the noise sources (such as an antenna) are installed near the sensor harness.Are noise sources installed?Install the noise sources apart from sensor harness.Go to step 5 .
5 CHECK VDCCM&H/U. Connect all connectors. Clear the memory. < Refer to CLEAR MEMORY MODE . > Perform the Inspection Mode. < Refer to INSPECTION MODE . > Read the DTC.Is the same DTC displayed?Replace the VDCCM&H/U. < Refer to VDC CONTROL MODULE AND HYDRAULIC CONTROL UNIT (VDCCM&H/U) . >Go to step 6 .
6 CHECK OTHER DTC DETECTION.Is any other DTC displayed?Perform the diagnosis according to DTC. < Refer to LIST OF DIAGNOSTIC TROUBLE CODE (DTC) . >It results from a temporary noise interference.
7 CHECK INSTALLATION OF ABS WHEEL SPEED SENSOR.Is the ABS wheel speed sensor installation bolt tightened to 7.5 N.m (0.76 kgf-m, 5.5 ft-lb)?Go to step 8 .Tighten the ABS wheel speed sensor installation bolts.
8 CHECK ABS WHEEL SPEED SENSOR SIGNAL. Install the ABS wheel speed sensor. Prepare an oscilloscope. Check the ABS wheel speed sensor. < Refer to CHECK ABS WHEEL SPEED SENSOR UNIT , INSPECTION, Front ABS Wheel Speed Sensor. >Does the oscilloscope indicate the waveform pattern like shown in the figure when the tire is slowly turned? Does the oscilloscope indication repeat the waveform pattern like shown in the figure when the tire is slowly turned in equal speed for one rotation or more?Go to step 10 .Go to step 9 .
9 CHECK ABS WHEEL SPEED SENSOR OR MAGNETIC ENCODER.Are there foreign matter, breakage or damage at the tip of ABS wheel speed sensor or magnetic encoder?Remove dirt thoroughly. Also replace the ABS wheel speed sensor or magnetic encoder as a unit with hub unit bearing if it is broken or damaged.Go to step 10 .
10 CHECK CAUSE OF SIGNAL NOISE. Make sure the radio wave devices and electronic components are installed correctly.Are the radio wave devices and electronic components installed correctly?Go to step 11 .Install the radio wave devices and electronic components properly.
11 CHECK CAUSE OF SIGNAL NOISE. Check if the noise sources (such as an antenna) are installed near the sensor harness.Are noise sources installed?Install the noise sources apart from sensor harness.Go to step 12 .
12 CHECK VDCCM&H/U. Connect all connectors. Clear the memory. < Refer to CLEAR MEMORY MODE . > Perform the Inspection Mode. < Refer to INSPECTION MODE . > Read the DTC.Is the same DTC displayed?Replace the VDCCM&H/U. < Refer to VDC CONTROL MODULE AND HYDRAULIC CONTROL UNIT (VDCCM&H/U) . >Go to step 13 .
13 CHECK OTHER DTC DETECTION.Is any other DTC displayed?Perform the diagnosis according to DTC. < Refer to LIST OF DIAGNOSTIC TROUBLE CODE (DTC) . >It results from a temporary noise interference. NOTE: Though the ABS warning light, and the VDC warning light & VDC indicator light remain lit at this point, this is normal. Drive the vehicle at 12 km/h (7 MPH) or more in order to turn off the ABS warning light, and the VDC warning light & VDC indicator light. Be sure to drive the vehicle and check that the warning light goes off.
NOTE
Though the ABS warning light, and the VDC warning light & VDC indicator light remain lit at this point, this is normal. Drive the vehicle at 12 km/h (7 MPH) or more in order to turn off the ABS warning light, and the VDC warning light & VDC indicator light. Be sure to drive the vehicle and check that the warning light goes off.

DIAGNOSTIC PROCEDURE

  1. Defective harness connector
  2. Defective VDCH/U solenoid valve
  1. ABS does not operate.
  2. EBD does not operate.
  3. VDC does not operate.
  4. Hill start assist does not operate.
  5. EyeSight does not operate. (EyeSight model only)
StepCheckYesNo
1 CHECK VDCCM&H/U INPUT VOLTAGE. Turn the ignition switch to OFF. Disconnect the connector from the VDCCM&H/U. Run the engine at idle. Measure the voltage between VDCCM&H/U connector and chassis ground. Connector & terminal (B310) No. 7 (+) - Chassis ground (-): (B310) No. 14 (+) - Chassis ground (-): (B310) No. 1 (+) - Chassis ground (-)Is the voltage 10 - 15 V?Go to step 2 .Repair the power supply circuit.
2 CHECK VDCCM&H/U GROUND CIRCUIT. Turn the ignition switch to OFF. Measure the resistance between VDCCM&H/U connector and chassis ground. Connector & terminal (B310) No. 13 - Chassis groundIs the resistance less than 10 ohms?Go to step 3 .Repair the VDCCM&H/U ground harness.
3 CHECK POOR CONTACT OF CONNECTORS.Is there poor contact of connector between generator, battery and VDCCM&H/U?Repair the connector.Go to step 4 .
4 CHECK VDCCM&H/U. Connect all connectors. Clear the memory. < Refer to CLEAR MEMORY MODE . > Perform the Inspection Mode. < Refer to INSPECTION MODE . > Read the DTC.Is the same DTC displayed?Replace the VDCCM&H/U. < Refer to VDC CONTROL MODULE AND HYDRAULIC CONTROL UNIT (VDCCM&H/U) . >Go to step 5 .
5 CHECK OTHER DTC DETECTION.Is any other DTC displayed?Perform the diagnosis according to DTC. < Refer to LIST OF DIAGNOSTIC TROUBLE CODE (DTC) . >Temporary poor contact occurs.

DIAGNOSTIC PROCEDURE

Defective VDCCM&H/U

  1. ABS does not operate.
  2. EBD does not operate.
  3. VDC does not operate.
  4. Hill start assist does not operate.
  5. EyeSight does not operate. (EyeSight model only)
StepCheckYesNo
1 CHECK VDCCM&H/U GROUND CIRCUIT. Turn the ignition switch to OFF. Disconnect the connector from the VDCCM&H/U. Measure the resistance between VDCCM&H/U and chassis ground. Connector & terminal (B310) No. 13 - Chassis groundIs the resistance less than 10 ohms?Go to step 2 .Repair the VDCCM&H/U ground harness.
2 CHECK POOR CONTACT OF CONNECTORS.Is there poor contact of the connector between the battery, ignition switch and VDCCM&H/U?Repair the connector.Go to step 3 .
3 CHECK CAUSE OF SIGNAL NOISE.Are the radio wave devices and electronic components installed correctly?Go to step 4 .Install the radio wave devices and electronic components properly.
4 CHECK CAUSE OF SIGNAL NOISE.Is there a noise source (such as an antenna) installed near the sensor harness and VDCCM?Install the noise sources apart from sensor harness and VDCCM.Go to step 5 .
5 CHECK VDCCM&H/U. Connect all connectors. Clear the memory. < Refer to CLEAR MEMORY MODE . > Perform the Inspection Mode. < Refer to INSPECTION MODE . > Read the DTC.Is the same DTC displayed?Replace the VDCCM&H/U. < Refer to VDC CONTROL MODULE AND HYDRAULIC CONTROL UNIT (VDCCM&H/U) . >Go to step 6 .
6 CHECK OTHER DTC DETECTION.Is any other DTC displayed?Perform the diagnosis according to DTC. < Refer to LIST OF DIAGNOSTIC TROUBLE CODE (DTC) . >Temporary poor contact occurs.

DIAGNOSTIC PROCEDURE

VDCCM parameter selection error

  1. ABS does not operate.
  2. EBD does not operate.
  3. VDC does not operate.
  4. Hill start assist does not operate.
  5. EyeSight does not operate. (EyeSight model only)

Note. When the VDCCM&H/U is replaced, this DTC may be stored.

StepCheckYesNo
1 CHECK VDCCM&H/U IDENTIFICATION SYMBOL. Check the identification symbol attached on the H/U. < Refer to SPECIFICATION , General Description. >Is the identification symbol correct?Go to step 2 .Replace the VDCCM&H/U. < Refer to VDC CONTROL MODULE AND HYDRAULIC CONTROL UNIT (VDCCM&H/U) . >
2 CHECK PARAMETER SELECTED IN VDCCM. < Refer to PARAMETER CHECK , OPERATION, Subaru Select Monitor. >Does the parameter registered in the VDCCM match the relevant vehicle?Replace the VDCCM&H/U. < Refer to VDC CONTROL MODULE AND HYDRAULIC CONTROL UNIT (VDCCM&H/U) . >Select and register the correct parameter. < Refer to PARAMETER SELECTION , OPERATION, Subaru Select Monitor. >

DIAGNOSTIC PROCEDURE

Improper VDCCM&H/U power supply voltage

  1. ABS does not operate.
  2. EBD may not operate.
  3. VDC does not operate.
  4. Hill start assist does not operate.
  5. EyeSight does not operate. (EyeSight model only)

Note. Warning lights go off if voltage returns.

StepCheckYesNo
1 CHECK GENERATOR. Start the engine. Run the engine at idle after warming up. Measure the voltage between generator terminal B and chassis ground. Terminals Generator terminal B (+) - Chassis ground (-)Is the voltage 10 - 15 V?Go to step 2 .Repair the generator.
2 CHECK BATTERY TERMINAL. Turn the ignition switch to OFF.Are the positive and negative battery terminals clamped tightly?Go to step 3 .Tighten the terminal.
3 CHECK VDCCM&H/U INPUT VOLTAGE. Disconnect the connector from the VDCCM&H/U. Run the engine at idle. Operate devices such as headlights, air conditioner, defogger, etc. which produce an electrical load. Measure the voltage between VDCCM&H/U connector and chassis ground. Connector & terminal (B310) No. 7 (+) - Chassis ground (-): (B310) No. 14 (+) - Chassis ground (-): (B310) No. 1 (+) - Chassis ground (-)Is the voltage 10 - 15 V?Go to step 4 .Repair the power supply circuit.
4 CHECK VDCCM&H/U GROUND CIRCUIT. Turn the ignition switch to OFF. Measure the resistance between VDCCM&H/U connector and chassis ground. Connector & terminal (B310) No. 13 - Chassis groundIs the resistance less than 10 ohms?Go to step 5 .Repair the VDCCM&H/U ground harness.
5 CHECK POOR CONTACT OF CONNECTORS.Is there poor contact of connector between generator, battery and VDCCM&H/U?Repair the connector.Go to step 6 .
6 CHECK VDCCM&H/U. Connect all connectors. Clear the memory. < Refer to CLEAR MEMORY MODE . > Perform the Inspection Mode. < Refer to INSPECTION MODE . > Read the DTC.Is the same DTC displayed?Replace the VDCCM&H/U. < Refer to VDC CONTROL MODULE AND HYDRAULIC CONTROL UNIT (VDCCM&H/U) . >Go to step 7 .
7 CHECK OTHER DTC DETECTION.Is any other DTC displayed?Perform the diagnosis according to DTC. < Refer to LIST OF DIAGNOSTIC TROUBLE CODE (DTC) . >Temporary poor contact occurs.

DIAGNOSTIC PROCEDURE

No CAN signal from TCM.

  1. ABS does not operate.
  2. VDC does not operate.
  3. Hill start assist does not operate.
  4. EyeSight does not operate. (EyeSight model only)
StepCheckYesNo
1 CHECK LAN SYSTEM. Perform the diagnosis for LAN system. < Refer to BASIC DIAGNOSTIC PROCEDURE . >Is there any fault in LAN system?Perform the diagnosis according to DTC for LAN system. < Refer to LIST OF DIAGNOSTIC TROUBLE CODE (DTC) . >Go to step 2 .
2 CHECK POOR CONTACT OF CONNECTORS.Is there poor contact of TCM connector?Repair the connector.Go to step 3 .
3 CHECK TCM. Refer to the basic diagnostic procedure for each transmission (diagnostics).Is the TCM normal?Go to step 4 .Replace the TCM. < Refer to 5AT-56, Transmission Control Module (TCM). > < Refer to TRANSMISSION CONTROL MODULE (TCM) . >
4 CHECK VDCCM&H/U. Connect all connectors. Clear the memory. < Refer to CLEAR MEMORY MODE . > Perform the Inspection Mode. < Refer to INSPECTION MODE . > Read the DTC.Is the same DTC displayed?Replace the VDCCM&H/U. < Refer to VDC CONTROL MODULE AND HYDRAULIC CONTROL UNIT (VDCCM&H/U) . >Go to step 5 .
5 CHECK OTHER DTC DETECTION.Is any other DTC displayed?Perform the diagnosis according to DTC. < Refer to LIST OF DIAGNOSTIC TROUBLE CODE (DTC) . >It results from a temporary noise interference.

DIAGNOSTIC PROCEDURE

Defective TCM

  1. ABS does not operate.
  2. VDC does not operate.
  3. Hill start assist does not operate.
  4. EyeSight does not operate. (EyeSight model only)
StepCheckYesNo
1 CHECK AT SYSTEM OR CVT SYSTEM. Start the engine. Check the DTC in AT system or CVT system.Is DTC of AT system or CVT system displayed?Repair the AT system or CVT system. < Refer to LIST OF DIAGNOSTIC TROUBLE CODE (DTC) . > < Refer to LIST OF DIAGNOSTIC TROUBLE CODE (DTC) . >Go to step 2 .
2 CHECK VDCCM&H/U. Connect all connectors. Clear the memory. < Refer to CLEAR MEMORY MODE . > Perform the Inspection Mode. < Refer to INSPECTION MODE . > Read the DTC.Is the same DTC displayed?Replace the VDCCM&H/U. < Refer to VDC CONTROL MODULE AND HYDRAULIC CONTROL UNIT (VDCCM&H/U) . >Go to step 3 .
3 CHECK OTHER DTC DETECTION.Is any other DTC displayed?Perform the diagnosis according to DTC. < Refer to LIST OF DIAGNOSTIC TROUBLE CODE (DTC) . >It results from a temporary noise interference.

DIAGNOSTIC PROCEDURE

Different control module specification

  1. ABS does not operate.
  2. VDC does not operate.
  3. Hill start assist does not operate.
  4. EyeSight does not operate. (EyeSight model only)

Note. When parameter selection for VDCCM is improper, this DTC may be memorized.

StepCheckYesNo
1 CHECK VDCCM&H/U IDENTIFICATION SYMBOL. Check the identification symbol attached on the H/U. < Refer to SPECIFICATION , General Description. >Is the identification symbol correct?Go to step 2 .Replace the VDCCM&H/U. < Refer to VDC CONTROL MODULE AND HYDRAULIC CONTROL UNIT (VDCCM&H/U) . >
2 CHECK PARAMETER SELECTED IN VDCCM. < Refer to PARAMETER CHECK , OPERATION, Subaru Select Monitor. >Does the parameter registered in the VDCCM match the relevant vehicle?Go to step 3 .Select and register the correct parameter. < Refer to PARAMETER SELECTION , OPERATION, Subaru Select Monitor. >
3 CHECK TCM SPECIFICATION. Check the TCM specification.Is the specification of TCM same as vehicle specification?Go to step 4 .Replace the TCM. < Refer to 5AT-56, Transmission Control Module (TCM). > < Refer to TRANSMISSION CONTROL MODULE (TCM) . >
4 CHECK AT SYSTEM OR CVT SYSTEM. Start the engine. Check the DTC in AT system or CVT system.Is DTC of AT system or CVT system displayed?Repair the AT system or CVT system. < Refer to 5AT(diag)-33, List of Diagnostic Trouble Code (DTC). > < Refer to LIST OF DIAGNOSTIC TROUBLE CODE (DTC) . >Go to step 5 .
5 CHECK ECM SPECIFICATION. Check the ECM specification.Is the specification of ECM same as vehicle specification?Go to step 6 .Replace the ECM. < Refer to ENGINE CONTROL MODULE (ECM) . > < Refer to ENGINE CONTROL MODULE (ECM) . >
6 CHECK VDCCM&H/U. Connect all connectors. Clear the memory. < Refer to CLEAR MEMORY MODE . > Perform the Inspection Mode. < Refer to INSPECTION MODE . > Read the DTC.Is the same DTC displayed?Replace the VDCCM&H/U. < Refer to VDC CONTROL MODULE AND HYDRAULIC CONTROL UNIT (VDCCM&H/U) . >Go to step 7 .
7 CHECK OTHER DTC DETECTION.Is any other DTC displayed?Perform the diagnosis according to DTC. < Refer to LIST OF DIAGNOSTIC TROUBLE CODE (DTC) . >It results from a temporary noise interference.

DIAGNOSTIC PROCEDURE

No CAN signal received from body integrated unit.

  1. VDC may not operate.
  2. Hill start assist does not operate. (MT model only)
StepCheckYesNo
1 CHECK LAN SYSTEM. Perform the diagnosis for LAN system. < Refer to BASIC DIAGNOSTIC PROCEDURE . >Is there any fault in LAN system?Perform the diagnosis according to DTC for LAN system. < Refer to LIST OF DIAGNOSTIC TROUBLE CODE (DTC) . >Go to step 2 .
2 CHECK POOR CONTACT OF CONNECTORS.Is there poor contact of body integrated unit connector?Repair the connector.Go to step 3 .
3 CHECK BODY INTEGRATED UNIT. Perform the diagnosis for body integrated unit. < Refer to BASIC DIAGNOSTIC PROCEDURE . >Is the body integrated unit normal?Go to step 4 .Perform the diagnosis according to DTC for the body integrated unit. < Refer to LIST OF DIAGNOSTIC TROUBLE CODE (DTC) . >
4 CHECK VDCCM&H/U. Connect all connectors. Clear the memory. < Refer to CLEAR MEMORY MODE . > Perform the Inspection Mode. < Refer to INSPECTION MODE . > Read the DTC.Is the same DTC displayed?Replace the VDCCM&H/U. < Refer to VDC CONTROL MODULE AND HYDRAULIC CONTROL UNIT (VDCCM&H/U) . >Go to step 5 .
5 CHECK OTHER DTC DETECTION.Is any other DTC displayed?Perform the diagnosis according to DTC. < Refer to LIST OF DIAGNOSTIC TROUBLE CODE (DTC) . >It results from a temporary noise interference.

DIAGNOSTIC PROCEDURE

CAN communication line circuit is open or shorted.

  1. VDC does not operate.
  2. Hill start assist does not operate.
  3. EyeSight does not operate. (EyeSight model only)
StepCheckYesNo
1 CHECK LAN SYSTEM. Perform the diagnosis for LAN system. < Refer to BASIC DIAGNOSTIC PROCEDURE . >Is there any fault in LAN system?Perform the diagnosis according to DTC for LAN system. < Refer to LIST OF DIAGNOSTIC TROUBLE CODE (DTC) . >Go to step 2 .
2 CHECK POOR CONTACT OF CONNECTORS.Is there poor contact of VDCCM&H/U connector?Repair the connector.Go to step 3 .
3 CHECK OUTPUT OF STEERING ANGLE SENSOR WITH SUBARU SELECT MONITOR. Select "Current Data Display & Save" on the Subaru Select Monitor. Check the «Steer Angle Sensor Op».Does the output signal change?Go to step 4 .Check output of the steering angle sensor. < Refer to DTC C0071 STEER ANGLE SENSOR OP , Diagnostic Procedure with Diagnostic Trouble Code (DTC). >
4 CHECK VDCCM&H/U. Connect all connectors. Clear the memory. < Refer to CLEAR MEMORY MODE . > Perform the Inspection Mode. < Refer to INSPECTION MODE . > Read the DTC.Is the same DTC displayed?Replace the VDCCM&H/U. < Refer to VDC CONTROL MODULE AND HYDRAULIC CONTROL UNIT (VDCCM&H/U) . >Temporary poor contact occurs.

DIAGNOSTIC PROCEDURE

No CAN signal from parking brake control module.

  1. VDC may not operate.
  2. Hill start assist does not operate.
StepCheckYesNo
1 CHECK LAN SYSTEM. Perform the diagnosis for LAN system. < Refer to BASIC DIAGNOSTIC PROCEDURE . >Is there any fault in LAN system?Perform the diagnosis according to DTC for LAN system. < Refer to LIST OF DIAGNOSTIC TROUBLE CODE (DTC) . >Go to step 2 .
2 CHECK POOR CONTACT OF CONNECTORS.Is there poor contact of the parking brake control module connector?Repair the connector.Go to step 3 .
3 CHECK PARKING BRAKE SYSTEM. Perform the diagnosis for the parking brake system. < Refer to BASIC DIAGNOSTIC PROCEDURE . >Is the parking brake system normal?Go to step 4 .Perform the diagnosis according to DTC for the parking brake system. < Refer to LIST OF DIAGNOSTIC TROUBLE CODE (DTC) . >
4 CHECK VDCCM&H/U. Connect all connectors. Clear the memory. < Refer to CLEAR MEMORY MODE . > Perform the Inspection Mode. < Refer to INSPECTION MODE . > Read the DTC.Is the same DTC displayed?Replace the VDCCM&H/U. < Refer to VDC CONTROL MODULE AND HYDRAULIC CONTROL UNIT (VDCCM&H/U) . >Go to step 5 .
5 CHECK OTHER DTC DETECTION.Is any other DTC displayed?Perform the diagnosis according to DTC. < Refer to LIST OF DIAGNOSTIC TROUBLE CODE (DTC) . >It results from a temporary noise interference.

DIAGNOSTIC PROCEDURE

Faulty signal is received from the stereo camera.

  1. VDC may not operate.
  2. Hill start assist does not operate.
  3. EyeSight does not operate. (EyeSight model only)
StepCheckYesNo
1 CHECK LAN SYSTEM. Perform the diagnosis for LAN system. < Refer to BASIC DIAGNOSTIC PROCEDURE . >Is there any fault in LAN system?Perform the diagnosis according to DTC for LAN system. < Refer to LIST OF DIAGNOSTIC TROUBLE CODE (DTC) . >Go to step 2 .
2 CHECK POOR CONTACT OF CONNECTORS.Is there poor contact of the stereo camera connector?Repair the connector.Go to step 3 .
3 CHECK STEREO CAMERA. Perform the diagnosis for the EyeSight system. < Refer to BASIC DIAGNOSTIC PROCEDURE . >Is the stereo camera normal?Go to step 4 .Perform the diagnosis according to DTC of the stereo camera. < Refer to LIST OF DIAGNOSTIC TROUBLE CODE (DTC) . >
4 CHECK VDCCM&H/U. Connect all connectors. Clear the memory. < Refer to CLEAR MEMORY MODE . > Perform the Inspection Mode. < Refer to INSPECTION MODE . > Read the DTC.Is the same DTC displayed?Replace the VDCCM&H/U. < Refer to VDC CONTROL MODULE AND HYDRAULIC CONTROL UNIT (VDCCM&H/U) . >Go to step 5 .
5 CHECK OTHER DTC DETECTION.Is any other DTC displayed?Perform the diagnosis according to DTC. < Refer to LIST OF DIAGNOSTIC TROUBLE CODE (DTC) . >It results from a temporary noise interference.

DIAGNOSTIC PROCEDURE

Defective valve relay

  1. ABS does not operate.
  2. EBD does not operate.
  3. VDC does not operate.
  4. Hill start assist does not operate.
  5. EyeSight does not operate. (EyeSight model only)
StepCheckYesNo
1 CHECK VDCCM&H/U INPUT VOLTAGE. Turn the ignition switch to OFF. Disconnect the connector from the VDCCM&H/U. Run the engine at idle. Measure the voltage between VDCCM&H/U connector and chassis ground. Connector & terminal (B310) No. 7 (+) - Chassis ground (-): (B310) No. 14 (+) - Chassis ground (-)Is the voltage 10 - 15 V?Go to step 2 .Repair the power supply circuit.
2 CHECK VDCCM&H/U INPUT VOLTAGE. Calculate the voltage difference measured in step 1. (B310) No. 7 (+) - Chassis ground (-): (B310) No. 14 (+) - Chassis ground (-)Is the voltage difference between A and B 2 V or more?Repair the power supply circuit.Go to step 3 .
3 CHECK INSTALLATION OF VDCCM&H/U GROUND.Is the VDCCM&H/U ground terminal installation bolt tightened to 13 N.m (1.3 kgf-m, 9.6 ft-lb)?Go to step 4 .Tighten the VDCCM&H/U ground terminal installation bolt.
4 CHECK VDCCM&H/U GROUND CIRCUIT. Turn the ignition switch to OFF. Measure the resistance between VDCCM&H/U connector and chassis ground. Connector & terminal (B310) No. 13 - Chassis groundIs the resistance less than 10 ohms?Go to step 5 .Repair the VDCCM&H/U ground harness.
5 CHECK VDCCM&H/U VALVE RELAY. Measure the resistance between VDCCM&H/U connector terminals. Connector & terminal (B310) No. 14 - (B310) No. 13Is the resistance 1 Mohms or more?Go to step 6 .Replace the VDCCM&H/U. < Refer to VDC CONTROL MODULE AND HYDRAULIC CONTROL UNIT (VDCCM&H/U) . >
6 CHECK POOR CONTACT OF CONNECTORS.Is there poor contact of connector between generator, battery and VDCCM&H/U?Repair the connector.Go to step 7 .
7 CHECK VDCCM&H/U. Connect all connectors. Clear the memory. < Refer to CLEAR MEMORY MODE . > Perform the Inspection Mode. < Refer to INSPECTION MODE . > Read the DTC.Is the same DTC displayed?Replace the VDCCM&H/U. < Refer to VDC CONTROL MODULE AND HYDRAULIC CONTROL UNIT (VDCCM&H/U) . >Go to step 8 .
8 CHECK OTHER DTC DETECTION.Is any other DTC displayed?Perform the diagnosis according to DTC. < Refer to LIST OF DIAGNOSTIC TROUBLE CODE (DTC) . >Temporary poor contact occurs.

DIAGNOSTIC PROCEDURE

  1. Defective motor and motor relay
  2. Defective harness connector
  1. ABS does not operate.
  2. VDC does not operate.
  3. EBD may not operate.
  4. Hill start assist does not operate.
  5. EyeSight does not operate. (EyeSight model only)
StepCheckYesNo
1 CHECK VDCCM&H/U INPUT VOLTAGE. Turn the ignition switch to OFF. Disconnect the connector from the VDCCM&H/U. Turn the ignition switch to ON. Measure the voltage between VDCCM&H/U connector and chassis ground. Connector & terminal (B310) No. 1 (+) - Chassis ground (-): (B310) No. 7 (+) - Chassis ground (-)Is the voltage 10 - 15 V?Go to step 2 .Repair the VDCCM&H/U power supply circuit.
2 CHECK VDCCM&H/U INPUT VOLTAGE. Calculate the voltage difference measured in step 1. (B310) No. 1 (+) - Chassis ground (-): (B310) No. 7 (+) - Chassis ground (-)Is the voltage difference between A and B 2 V or more?Repair the power supply circuit.Go to step 3 .
3 CHECK INSTALLATION OF VDCCM&H/U GROUND.Is the VDCCM&H/U ground terminal installation bolt tightened to 13 N.m (1.3 kgf-m, 9.6 ft-lb)?Go to step 4 .Tighten the VDCCM&H/U ground terminal installation bolt.
4 CHECK VDCCM&H/U GROUND CIRCUIT. Turn the ignition switch to OFF. Measure the resistance between VDCCM&H/U connector and chassis ground. Connector & terminal (B310) No. 13 - Chassis groundIs the resistance less than 10 ohms?Go to step 5 .Repair the VDCCM&H/U ground harness.
5 CHECK VDCCM&H/U MOTOR RELAY. Measure the resistance between VDCCM&H/U connector terminals. Connector & terminal (B310) No. 1 - (B310) No. 13Is the resistance 1 Mohms or more?Go to step 6 .Replace the VDCCM&H/U. < Refer to VDC CONTROL MODULE AND HYDRAULIC CONTROL UNIT (VDCCM&H/U) . >
6 CHECK POOR CONTACT OF CONNECTORS. Turn the ignition switch to OFF.Is there poor contact of connector between generator, battery and VDCCM&H/U?Repair the connector.Go to step 7 .
7 CHECK VDCCM&H/U. Connect all connectors. Clear the memory. < Refer to CLEAR MEMORY MODE . > Perform the Inspection Mode. < Refer to INSPECTION MODE . > Read the DTC.Is the same DTC displayed?Replace the VDCCM&H/U. < Refer to VDC CONTROL MODULE AND HYDRAULIC CONTROL UNIT (VDCCM&H/U) . >Go to step 8 .
8 CHECK OTHER DTC DETECTION.Is any other DTC displayed?Perform the diagnosis according to DTC. < Refer to LIST OF DIAGNOSTIC TROUBLE CODE (DTC) . >Temporary poor contact occurs. NOTE: Though the ABS warning light, and the VDC warning light & VDC indicator light remain lit at this point, this is normal. Drive the vehicle at 12 km/h (7 MPH) or more in order to turn off the ABS warning light, and the VDC warning light & VDC indicator light. Be sure to drive the vehicle and check that the warning light goes off.
NOTE
Though the ABS warning light, and the VDC warning light & VDC indicator light remain lit at this point, this is normal. Drive the vehicle at 12 km/h (7 MPH) or more in order to turn off the ABS warning light, and the VDC warning light & VDC indicator light. Be sure to drive the vehicle and check that the warning light goes off.

DIAGNOSTIC PROCEDURE

Defective stop light switch

  1. VDC does not operate.
  2. Hill start assist does not operate.
  3. EyeSight does not operate. (EyeSight model only)
StepCheckYesNo
1 CHECK STOP LIGHT SWITCH. Turn the ignition switch to OFF. Disconnect the stop light switch connector. Measure the resistance of stop light switch terminals. Connector & terminal (B65) No. 2 - No. 3Is the resistance 1 ohms or less when the switch is ON (when pedal is depressed)?Go to step 2 .Replace the stop light switch. < Refer to STOP LIGHT SWITCH . >
2 CHECK STOP LIGHT POWER SUPPLY. Measure the voltage between stop light switch terminal and chassis ground. Connector & terminal (B65) No. 2 (+) - Chassis ground (-)Is the voltage 10 - 15 V?Go to step 3 .Repair the stop light power supply circuit.
3 CHECK STOP LIGHT SWITCH HARNESS. Disconnect the connector from the VDCCM&H/U. Measure the resistance between VDCCM&H/U and stop light switch. Connector & terminal (B65) No. 3 - (B310) No. 3Is the resistance less than 1 ohms?Go to step 4 .Repair the stop light switch circuit.
4 CHECK POOR CONTACT OF CONNECTORS.Is there poor contact of connector between stop light switch and VDCCM&H/U?Repair the connector.Go to step 5 .
5 CHECK VDCCM&H/U. Connect all connectors. Clear the memory. < Refer to CLEAR MEMORY MODE . > Perform the Inspection Mode. < Refer to INSPECTION MODE . > Read the DTC.Is the same DTC displayed?Replace the VDCCM&H/U. < Refer to VDC CONTROL MODULE AND HYDRAULIC CONTROL UNIT (VDCCM&H/U) . >Go to step 6 .
6 CHECK OTHER DTC DETECTION.Is any other DTC displayed?Perform the diagnosis according to DTC. < Refer to LIST OF DIAGNOSTIC TROUBLE CODE (DTC) . >Temporary poor contact occurs.

DIAGNOSTIC PROCEDURE

Defective stop light switch

  1. VDC does not operate.
  2. Hill start assist does not operate.
  3. EyeSight does not operate. (EyeSight model only)
StepCheckYesNo
1 CHECK STOP LIGHT SWITCH. Turn the ignition switch to OFF. Disconnect the stop light switch connector. Measure the resistance of stop light switch terminals. Connector & terminal (B65) No. 2 - No. 3Is the resistance 1 Mohms or more when switch is OFF (when pedal is not depressed)?Go to step 2 .Replace the stop light switch. < Refer to STOP LIGHT SWITCH . >
2 CHECK STOP LIGHT SWITCH HARNESS. Disconnect the connector from the VDCCM&H/U. Measure the resistance between VDCCM&H/U connector and chassis ground. Connector & terminal (B310) No. 3 - Chassis groundIs the resistance less than 1 Mohms?Go to step 3 .Repair the stop light switch circuit.
3 INTERVIEW CUSTOMERS. Make sure that the operation was performed in which accelerator pedal and brake pedal were depressed simultaneously (with depressing brake pedal with left foot).Were the acceleration pedal and brake pedal depressed simultaneously?System is normal. (DTC may be recorded while brake is applied during driving.)Go to step 4 .
4 CHECK VDCCM&H/U. Connect all connectors. Clear the memory. < Refer to CLEAR MEMORY MODE . > Perform the Inspection Mode. < Refer to INSPECTION MODE . > Read the DTC.Is the same DTC displayed?Replace the VDCCM&H/U. < Refer to VDC CONTROL MODULE AND HYDRAULIC CONTROL UNIT (VDCCM&H/U) . >Go to step 5 .
5 CHECK OTHER DTC DETECTION.Is any other DTC displayed?Perform the diagnosis according to DTC. < Refer to LIST OF DIAGNOSTIC TROUBLE CODE (DTC) . >Temporary poor contact occurs.

DIAGNOSTIC PROCEDURE

Longitudinal G sensor signal failure

  1. ABS does not operate.
  2. VDC does not operate.
  3. Hill start assist does not operate.
  4. EyeSight does not operate. (EyeSight model only)

Note. For the diagnostic procedure, < Refer to DTC C0056 G SENSOR SIGNAL , Diagnostic Procedure with Diagnostic Trouble Code (DTC). >

Longitudinal G sensor signal failure

  1. ABS does not operate.
  2. VDC does not operate.
  3. Hill start assist does not operate.
  4. EyeSight does not operate. (EyeSight model only)
StepCheckYesNo
1 CHECK INSTALLATION OF VDCCM&H/U.Is VDCCM&H/U installed properly without being tilted? Is the bracket deformation-free? Are the VDCCM&H/U installation bolts installed without missing or getting loose?Go to step 2 .Repair the defective part. Go to step 2 . Install VDCCM&H/U properly. Replace the bracket if faulty. Tighten the VDCCM&H/U installation bolt. < Refer to VDC CONTROL MODULE AND HYDRAULIC CONTROL UNIT (VDCCM&H/U) , COMPONENT, General Description. >
2 CHECK OUTPUT OF LONGITUDINAL G SENSOR USING SUBARU SELECT MONITOR. Park the vehicle on a level surface. Connect Subaru Select Monitor, and select "Current Data Display & Save". Read the «Fr Rr G sensor Output» displayed on display.Is the indicated reading of the longitudinal G sensor on the monitor display -2 - 2 m/s 2 ?Go to step 3 .Recheck from step 1, and if the problem is not solved, go to next. Go to step 6 .
3 SET 0 POINT FOR LONGITUDINAL G SENSOR USING SUBARU SELECT MONITOR. Select "Function Check Sequence" on Subaru Select Monitor. Perform the "Longitudinal G sensor & lateral G sensor 0 point setting mode". < Refer to LONGITUDINAL G SENSOR & LATERAL G SENSOR 0 POINT SETTING MODE , ADJUSTMENT, VDC Control Module and Hydraulic Control Unit (VDCCM&H/U). >Is the 0 point setting successful?Go to step 4 .Recheck from step 1, and when the 0 point setting is not possible, replace the VDCCM&H/U. < Refer to VDC CONTROL MODULE AND HYDRAULIC CONTROL UNIT (VDCCM&H/U) . >
4 PERFORM DRIVING TEST. Drive approximately 10 minutes, and check if the warning lights illuminate or improperly operate during driving. In a safe place, drive the vehicle while alternating acceleration and deceleration as much as possible. Did the ABS warning light or VDC warning light remain off?Does ABS or VDC operate without malfunction?Go to step 5 .Recheck from step 1, and when the warning lights illuminate or improperly operate, replace the VDCCM&H/U. < Refer to VDC CONTROL MODULE AND HYDRAULIC CONTROL UNIT (VDCCM&H/U) . >
5 CHECK OUTPUT OF LONGITUDINAL G SENSOR USING SUBARU SELECT MONITOR. Park the vehicle on a level surface. Connect Subaru Select Monitor, and select "Current Data Display & Save". Read the «Fr Rr G sensor Output» displayed on display.Is the indicated reading of the longitudinal G sensor on the monitor display -1.5 - 1.5 m/s 2 ?End. It results from a temporary noise interference.Recheck from step 1, and if the problem is not solved, replace the VDCCM&H/U. < Refer to VDC CONTROL MODULE AND HYDRAULIC CONTROL UNIT (VDCCM&H/U) . >
6 CHECK OUTPUT OF LONGITUDINAL G SENSOR USING SUBARU SELECT MONITOR. Remove the VDCCM&H/U installation bolt and bracket. Keep VDCCM&H/U in a horizontal position. Connect Subaru Select Monitor, and select "Current Data Display & Save". Read the «Fr Rr G sensor Output» displayed on display.When the VDCCM&H/U is in a horizontal position, is the indicated reading of the longitudinal G sensor on the monitor display -1.5 - 1.5 m/s 2 ?Check the bracket and brake pipe, and install VDCCM&H/U in a horizontal position to the vehicle.Replace the VDCCM&H/U. < Refer to VDC CONTROL MODULE AND HYDRAULIC CONTROL UNIT (VDCCM&H/U) . >

DIAGNOSTIC PROCEDURE

No CAN signal from ECM.

  1. VDC does not operate.
  2. Hill start assist does not operate.
  3. EyeSight does not operate. (EyeSight model only)
StepCheckYesNo
1 CHECK LAN SYSTEM. Perform the diagnosis for LAN system. < Refer to BASIC DIAGNOSTIC PROCEDURE . >Is there any fault in LAN system?Perform the diagnosis according to DTC for LAN system. < Refer to LIST OF DIAGNOSTIC TROUBLE CODE (DTC) . >Go to step 2 .
2 CHECK POOR CONTACT OF CONNECTORS.Is there poor contact of ECM connector?Repair the connector.Go to step 3 .
3 CHECK ECM. Refer to the basic diagnostic procedure for each engine (diagnostics).Is ECM normal?Go to step 4 .Replace the ECM. < Refer to ENGINE CONTROL MODULE (ECM) . > < Refer to ENGINE CONTROL MODULE (ECM) . >
4 CHECK VDCCM&H/U. Connect all connectors. Clear the memory. < Refer to CLEAR MEMORY MODE . > Perform the Inspection Mode. < Refer to INSPECTION MODE . > Read the DTC.Is the same DTC displayed?Replace the VDCCM&H/U. < Refer to VDC CONTROL MODULE AND HYDRAULIC CONTROL UNIT (VDCCM&H/U) . >Go to step 5 .
5 CHECK OTHER DTC DETECTION.Is any other DTC displayed?Perform the diagnosis according to DTC. < Refer to LIST OF DIAGNOSTIC TROUBLE CODE (DTC) . >It results from a temporary noise interference.

DIAGNOSTIC PROCEDURE

ECM malfunctioning

  1. VDC does not operate.
  2. Hill start assist does not operate.
  3. EyeSight does not operate. (EyeSight model only)
StepCheckYesNo
1 CHECK COOPERATION CONTROL FEASIBILITY OF ECM USING SUBARU SELECT MONITOR. Start the engine, and run the engine at idle approximately 5 minutes. Connect Subaru Select Monitor, and select "Current Data Display & Save". Check the «E/G Control Stop Flag» displayed on screen.Is the «E/G Control Stop Flag» "1"?Go to step 4 .Go to step 2 .
2 CHECK WARNING LIGHT. Check whether the VDC warning light illuminates after driving for 1 minute or more at a speed of 10 km/h or more.Does the VDC warning light illuminate?Go to step 3 .VDC is normal. Perform the Clear Memory Mode. NOTE: DTC may be recorded if cranking is performed during driving.
3 CHECK POOR CONTACT OF CONNECTORS.Is there poor contact of ECM connector?Repair the connector.Go to step 4 .
4 CHECK ECM. Refer to the basic diagnostic procedure for each engine (diagnostics).Is ECM normal?Go to step 5 .Replace the ECM. < Refer to ENGINE CONTROL MODULE (ECM) . > < Refer to ENGINE CONTROL MODULE (ECM) . >
5 CHECK VDCCM&H/U. Connect all connectors. Clear the memory. < Refer to CLEAR MEMORY MODE . > Perform the Inspection Mode. < Refer to INSPECTION MODE . > Read the DTC.Is the same DTC displayed?Replace the VDCCM&H/U. < Refer to VDC CONTROL MODULE AND HYDRAULIC CONTROL UNIT (VDCCM&H/U) . >Go to step 6 .
6 CHECK OTHER DTC DETECTION.Is any other DTC displayed?Perform the diagnosis according to DTC. < Refer to LIST OF DIAGNOSTIC TROUBLE CODE (DTC) . >It results from a temporary noise interference.
NOTE
DTC may be recorded if cranking is performed during driving.

DIAGNOSTIC PROCEDURE

ECM prohibits the cooperation control.

  1. VDC does not operate.
  2. Hill start assist does not operate.
  3. EyeSight does not operate. (EyeSight model only)

Note. For the diagnostic procedure, < Refer to DTC C0057 ECM CONTROL SYSTEM , Diagnostic Procedure with Diagnostic Trouble Code (DTC). > Warning lights go off if the cooperation control of ECM returns.

Communication from steering angle sensor is faulty.

  1. VDC does not operate.
  2. Hill start assist does not operate.
  3. EyeSight does not operate. (EyeSight model only)
StepCheckYesNo
1 CHECK POWER SUPPLY FOR STEERING ANGLE SENSOR. Turn the ignition switch to OFF. Disconnect the connector from steering angle sensor. Turn the ignition switch to ON. Measure the voltage between steering angle sensor and chassis ground. Connector & terminal (B231) No. 4 (+) - Chassis ground (-)Is the voltage 10 - 15 V?Go to step 2 .Repair the steering angle sensor power supply circuit.
2 CHECK GROUND CIRCUIT OF STEERING ANGLE SENSOR. Measure the resistance between steering angle sensor and chassis ground. Connector & terminal (B231) No. 1 - Chassis groundIs the resistance less than 10 ohms?Go to step 3 .Repair ground circuit in the steering angle sensor.
3 CHECK STEERING ANGLE SENSOR. Turn the ignition switch to OFF. Connect all connectors. Clear the memory. < Refer to CLEAR MEMORY MODE . > Perform the Inspection Mode. < Refer to INSPECTION MODE . > Read the DTC.Is the same DTC displayed?Go to step 4 .Go to step 5 .
4 CHECK VDCCM&H/U. Turn the ignition switch to OFF. Replace the steering angle sensor. < Refer to STEERING ANGLE SENSOR . > Clear the memory. < Refer to CLEAR MEMORY MODE . > Perform the Inspection Mode. < Refer to INSPECTION MODE . > Read the DTC.Is the same DTC displayed?Replace the VDCCM&H/U. < Refer to VDC CONTROL MODULE AND HYDRAULIC CONTROL UNIT (VDCCM&H/U) . >Go to step 6 .
5 CHECK OTHER DTC DETECTION.Is any other DTC displayed?Perform the diagnosis according to DTC. < Refer to LIST OF DIAGNOSTIC TROUBLE CODE (DTC) . >Temporary poor contact occurs. Though VDC warning light may remain lit, this is normal. Warning light goes off when the vehicle is driven at 12 km/h (7 MPH) or more.
6 CHECK OTHER DTC DETECTION.Is any other DTC displayed?Perform the diagnosis according to DTC. < Refer to LIST OF DIAGNOSTIC TROUBLE CODE (DTC) . >Original steering angle sensor malfunction

DIAGNOSTIC PROCEDURE

Steering angle sensor output is faulty.

  1. VDC does not operate.
  2. Hill start assist does not operate.
  3. EyeSight does not operate. (EyeSight model only)
StepCheckYesNo
1 CHECK POWER SUPPLY FOR STEERING ANGLE SENSOR. Turn the ignition switch to OFF. Disconnect the connector from steering angle sensor. Turn the ignition switch to ON. Measure the voltage between steering angle sensor and chassis ground. Connector & terminal (B231) No. 4 (+) - Chassis ground (-)Is the voltage 10 - 15 V?Go to step 2 .Repair the steering angle sensor power supply circuit.
2 CHECK GROUND CIRCUIT OF STEERING ANGLE SENSOR. Measure the resistance between steering angle sensor and chassis ground. Connector & terminal (B231) No. 1 - Chassis groundIs the resistance less than 10 ohms?Go to step 3 .Repair ground circuit in the steering angle sensor.
3 CHECK STEERING ANGLE SENSOR HARNESS. Disconnect the connector from the VDCCM&H/U. Measure the resistance between VDCCM&H/U and steering angel sensor. Connector & terminal (B231) No. 2 - (B310) No. 8: (B231) No. 3 - (B310) No. 10Is the resistance less than 1 ohms?Go to step 4 .Repair the harness between the steering angle sensor and VDCCM&H/U.
4 CHECK GROUND SHORT CIRCUIT OF STEERING ANGLE SENSOR HARNESS. Measure the resistance between steering angle sensor and chassis ground. Connector & terminal (B231) No. 2 - Chassis ground: (B231) No. 3 - Chassis groundIs the resistance 1 Mohms or more?Go to step 5 .Repair the harness between the steering angle sensor and VDCCM&H/U.
5 CHECK STEERING WHEEL. Drive the vehicle on a flat road. Park the vehicle straight. Check the steering wheel for deviation from center.Is the deviation from the center of steering wheel less than 5°?Go to step 6 .Perform the centering adjustment of steering wheel, and perform Set up mode for Neutral of Steering Angle Sensor & Lateral G Sensor 0 point. < Refer to SET UP MODE FOR NEUTRAL OF STEERING ANGLE SENSOR & LATERAL G SENSOR 0 POINT , ADJUSTMENT, VDC Control Module and Hydraulic Control Unit (VDCCM&H/U). >
6 CHECK OUTPUT OF STEERING ANGLE SENSOR USING SUBARU SELECT MONITOR. Adjust steering wheel to the center position. Connect Subaru Select Monitor, and select "Current Data Display & Save". Read the «Steer Angle Sensor Op» displayed on display.Is the indicated reading of the «Steer Angle Sensor Op» on the monitor display -10° - 10°?Perform Set up mode for Neutral of Steering Angle Sensor & Lateral G Sensor 0 point. Go to step 7. < Refer to SET UP MODE FOR NEUTRAL OF STEERING ANGLE SENSOR & LATERAL G SENSOR 0 POINT , ADJUSTMENT, VDC Control Module and Hydraulic Control Unit (VDCCM&H/U). >Check the installation of the steering wheel and steering angle sensor.
7 CHECK STEERING ANGLE SENSOR USING SUBARU SELECT MONITOR. Turn the ignition switch to OFF. Connect all connectors. Clear the memory. < Refer to CLEAR MEMORY MODE . > Perform the Inspection Mode. < Refer to INSPECTION MODE . > Read the DTC.Is the same DTC displayed?Go to step 8 .Go to step 9 .
8 CHECK VDCCM&H/U. Turn the ignition switch to OFF. Replace the steering angle sensor. < Refer to STEERING ANGLE SENSOR . > Clear the memory. < Refer to CLEAR MEMORY MODE . > Perform the Inspection Mode. < Refer to INSPECTION MODE . > Read the DTC.Is the same DTC displayed?Replace the VDCCM&H/U. < Refer to VDC CONTROL MODULE AND HYDRAULIC CONTROL UNIT (VDCCM&H/U) . >Go to step 10 .
9 CHECK OTHER DTC DETECTION.Is any other DTC displayed?Perform the diagnosis according to DTC. < Refer to LIST OF DIAGNOSTIC TROUBLE CODE (DTC) . >Temporary poor contact occurs. Though VDC warning light may remain lit, this is normal. Warning light goes off when the vehicle is driven at 12 km/h (7 MPH) or more.
10 CHECK OTHER DTC DETECTION.Is any other DTC displayed?Perform the diagnosis according to DTC. < Refer to LIST OF DIAGNOSTIC TROUBLE CODE (DTC) . >Original steering angle sensor malfunction

DIAGNOSTIC PROCEDURE

Defective yaw rate sensor

  1. VDC does not operate.
  2. Hill start assist does not operate.
  3. EyeSight does not operate. (EyeSight model only)
StepCheckYesNo
1 INTERVIEW CUSTOMERS. Check if the vehicle ran the road with banks or sandy surface (which does not mean a dirt road).Did the vehicle run the road with banks or sandy surface (which does not mean a dirt road)?VDCCM&H/U may record DTC when the vehicle ran the road with banks or sandy surface (which does not mean a dirt road).Go to step 2 .
2 CHECK INSTALLATION OF VDCCM&H/U.Is VDCCM&H/U installed properly without being tilted? Is the bracket deformation-free? Are the VDCCM&H/U installation bolts installed without missing or getting loose?Go to step 3 .Repair the defective part. Go to step 3 . Install VDCCM&H/U properly. Replace the bracket if faulty. Tighten the VDCCM&H/U installation bolt. < Refer to VDC CONTROL MODULE AND HYDRAULIC CONTROL UNIT (VDCCM&H/U) , COMPONENT, General Description. >
3 CHECK OUTPUT OF YAW RATE & G SENSOR WITH SUBARU SELECT MONITOR. Drive the vehicle on a flat road. Park the vehicle straight. Select "Current Data Display & Save" on the Subaru Select Monitor. Read the «Yaw Rate Sensor Output» displayed on display.Is the reading indicated on monitor display -4 - 4 deg/s?Go to step 4 .Replace the VDCCM&H/U. < Refer to VDC CONTROL MODULE AND HYDRAULIC CONTROL UNIT (VDCCM&H/U) . >
4 CHECK OUTPUT OF STEERING ANGLE SENSOR WITH SUBARU SELECT MONITOR. Drive the vehicle on a flat road. Park the vehicle straight. Select "Current Data Display & Save" on the Subaru Select Monitor. Read the «Steer Angle Sensor Op» displayed on display.Is the reading indicated on monitor display -5 - 5°?Go to step 5 .Perform the centering adjustment of steering wheel.
5 CHECK VDCCM&H/U. Turn the ignition switch to OFF. Clear the memory. < Refer to CLEAR MEMORY MODE . > Perform the Inspection Mode. < Refer to INSPECTION MODE . > Read the DTC.Is the same DTC displayed?Replace the VDCCM&H/U. < Refer to VDC CONTROL MODULE AND HYDRAULIC CONTROL UNIT (VDCCM&H/U) . >Go to step 6 .
6 CHECK OTHER DTC DETECTION.Is any other DTC displayed?Perform the diagnosis according to DTC. < Refer to LIST OF DIAGNOSTIC TROUBLE CODE (DTC) . >It results from a temporary noise interference. Though VDC warning light may remain lit, this is normal. Warning light goes off when the vehicle is driven at 12 km/h (7 MPH) or more.

DIAGNOSTIC PROCEDURE

Defective lateral G sensor

  1. VDC does not operate.
  2. Hill start assist does not operate.
  3. EyeSight does not operate. (EyeSight model only)
StepCheckYesNo
1 CHECK INSTALLATION OF VDCCM&H/U.Is VDCCM&H/U installed properly without being tilted? Is the bracket deformation-free? Are the VDCCM&H/U installation bolts installed without missing or getting loose?Go to step 2 .Repair the defective part. Go to step 2 . Install VDCCM&H/U properly. Replace the bracket if faulty. Tighten the VDCCM&H/U installation bolt. < Refer to VDC CONTROL MODULE AND HYDRAULIC CONTROL UNIT (VDCCM&H/U) , COMPONENT, General Description. >
2 CHECK OUTPUT OF STEERING ANGLE SENSOR USING SUBARU SELECT MONITOR. Park the vehicle straight on a level surface. Connect Subaru Select Monitor, and select "Current Data Display & Save". Read the «Steer Angle Sensor Op» displayed on display.Is the indicated reading of the steering angle sensor on the monitor display -10° - 10°?Go to step 3 .Check the installation of steering angle sensor.
3 CHECK OUTPUT OF LATERAL G SENSOR WITH SUBARU SELECT MONITOR. Park the vehicle straight on a level surface. Connect Subaru Select Monitor, and select "Current Data Display & Save". Read the «Lateral G sensor Output» displayed on display.Is the indicated reading of the lateral G sensor on the monitor display -2 - 2 m/s 2 ?Go to step 4 .Recheck from step 1, and if the problem is not solved, go to next. Go to step 7 .
4 SET 0 POINT FOR LATERAL G SENSOR USING SUBARU SELECT MONITOR. Select "Function Check Sequence" on Subaru Select Monitor. Perform Set up mode for Neutral of Steering Angle Sensor & Lateral G Sensor 0 point. < Refer to SET UP MODE FOR NEUTRAL OF STEERING ANGLE SENSOR & LATERAL G SENSOR 0 POINT , ADJUSTMENT, VDC Control Module and Hydraulic Control Unit (VDCCM&H/U). >Is the 0 point setting successful?Go to step 5 .Recheck from step 1, and when the 0 point setting is not possible, replace the VDCCM&H/U. < Refer to VDC CONTROL MODULE AND HYDRAULIC CONTROL UNIT (VDCCM&H/U) . >
5 PERFORM DRIVING TEST. Drive approximately 10 minutes, and check if the warning lights illuminate or improperly operate during driving. In a safe place, drive the vehicle while alternating acceleration and deceleration as much as possible.Did the ABS warning light or VDC warning light remain off? Does ABS or VDC operate without malfunction?Go to step 6 .Recheck from step 1, and when the warning lights illuminate or improperly operate, replace the VDCCM&H/U. < Refer to VDC CONTROL MODULE AND HYDRAULIC CONTROL UNIT (VDCCM&H/U) . >
6 CHECK OUTPUT OF LATERAL G SENSOR WITH SUBARU SELECT MONITOR. Park the vehicle on a level surface. Connect Subaru Select Monitor, and select "Current Data Display & Save". Read the «Lateral G sensor Output» displayed on display.Is the indicated reading of the lateral G sensor on the monitor display -1.5 - 1.5 m/s 2 ?End. It results from a temporary noise interference. Though VDC warning light may remain lit, this is normal. Warning light goes off when the vehicle is driven at 12 km/h (7 MPH) or more.Recheck from step 1, and if the problem is not solved, replace the VDCCM&H/U. < Refer to VDC CONTROL MODULE AND HYDRAULIC CONTROL UNIT (VDCCM&H/U) . >
7 CHECK OUTPUT OF LATERAL G SENSOR WITH SUBARU SELECT MONITOR. Remove the VDCCM&H/U installation bolt and bracket. Keep VDCCM&H/U in a horizontal position. Connect Subaru Select Monitor, and select "Current Data Display & Save". Read the «Lateral G sensor Output» displayed on display.When the VDCCM&H/U is in a horizontal position, is the indicated reading of the lateral G sensor on the monitor display -1.5 - 1.5 m/s 2 ?Check the bracket and brake pipe, and install VDCCM&H/U in a horizontal position to the vehicle.Replace the VDCCM&H/U. < Refer to VDC CONTROL MODULE AND HYDRAULIC CONTROL UNIT (VDCCM&H/U) . >

DIAGNOSTIC PROCEDURE

Defective pressure sensor

  1. ABS does not operate.
  2. VDC does not operate.
  3. Hill start assist does not operate.
  4. EyeSight does not operate. (EyeSight model only)
StepCheckYesNo
1 CHECK STOP LIGHT SWITCH CIRCUIT. Check stop light switch open circuit.Is the stop light switch circuit OK?Go to step 2 .Repair the stop light switch circuit. NOTE: If there is malfunction in the stop light circuit, DTC may be recorded in the memory.
2 CHECK OUTPUT OF PRESSURE SENSOR WITH SUBARU SELECT MONITOR. Select "Current Data Display & Save" in Subaru Select Monitor. Read the master cylinder output displayed on display.With the brake pedal released, is the displayed value 0 - 11 bar?Go to step 3 .Replace the VDCCM&H/U. < Refer to VDC CONTROL MODULE AND HYDRAULIC CONTROL UNIT (VDCCM&H/U) . >
3 CHECK OUTPUT OF PRESSURE SENSOR WITH SUBARU SELECT MONITOR. Select "Current Data Display & Save" in Subaru Select Monitor. Read the master cylinder output displayed on display.When the brake pedal is operated, does the master cylinder output value displayed on the display change in accordance with the brake pedal?Go to step 4 .Replace the VDCCM&H/U. < Refer to VDC CONTROL MODULE AND HYDRAULIC CONTROL UNIT (VDCCM&H/U) . >
4 CHECK PRESSURE SENSOR. Clear the memory. < Refer to CLEAR MEMORY MODE . > Perform the Inspection Mode. < Refer to INSPECTION MODE . > Read the DTC.Is the same DTC displayed?Replace the VDCCM&H/U. < Refer to VDC CONTROL MODULE AND HYDRAULIC CONTROL UNIT (VDCCM&H/U) . >Go to step 5 .
5 CHECK OTHER DTC DETECTION.Is any other DTC displayed?Perform the diagnosis according to DTC. < Refer to LIST OF DIAGNOSTIC TROUBLE CODE (DTC) . >It results from a temporary noise interference.
NOTE
If there is malfunction in the stop light circuit, DTC may be recorded in the memory.

DIAGNOSTIC PROCEDURE

Defective pressure sensor

EyeSight does not operate. (EyeSight model only)

StepCheckYesNo
1 CHECK STOP LIGHT SWITCH CIRCUIT. Check stop light switch open circuit.Is the stop light switch circuit OK?Go to step 2 .Repair the stop light switch circuit. NOTE: If there is malfunction in the stop light circuit, DTC may be recorded in the memory.
2 CHECK OUTPUT OF PRESSURE SENSOR WITH SUBARU SELECT MONITOR. Select "Current Data Display & Save" in Subaru Select Monitor. Read the FL wheel cylinder output and FR wheel cylinder output displayed on display.With the brake pedal released, is the displayed value 0 - 11 bar?Go to step 3 .Replace the VDCCM&H/U. < Refer to VDC CONTROL MODULE AND HYDRAULIC CONTROL UNIT (VDCCM&H/U) . >
3 CHECK OUTPUT OF PRESSURE SENSOR WITH SUBARU SELECT MONITOR. Select "Current Data Display & Save" in Subaru Select Monitor. Read the FL wheel cylinder output and FR wheel cylinder output displayed on display.When the brake pedal is operated, do the FL wheel cylinder output and FR wheel cylinder output displayed on the screen change in accordance with the brake pedal? In addition, is the difference between FR and FL wheel cylinder output values less than 10 bar?Go to step 4 .Replace the VDCCM&H/U. < Refer to VDC CONTROL MODULE AND HYDRAULIC CONTROL UNIT (VDCCM&H/U) . >
4 CHECK PRESSURE SENSOR. Clear the memory. < Refer to CLEAR MEMORY MODE . > Perform the Inspection Mode. < Refer to INSPECTION MODE . > Read the DTC.Is the same DTC displayed?Replace the VDCCM&H/U. < Refer to VDC CONTROL MODULE AND HYDRAULIC CONTROL UNIT (VDCCM&H/U) . >Go to step 5 .
5 CHECK OTHER DTC DETECTION.Is any other DTC displayed?Perform the diagnosis according to DTC. < Refer to LIST OF DIAGNOSTIC TROUBLE CODE (DTC) . >It results from a temporary noise interference.
NOTE
If there is malfunction in the stop light circuit, DTC may be recorded in the memory.

DIAGNOSTIC PROCEDURE

VDC long time sequential control

  1. VDC does not operate.
  2. Hill start assist does not operate.
  3. EyeSight does not operate. (EyeSight model only)
StepCheckYesNo
1 CHECK INSTALLATION OF VDCCM&H/U.Is VDCCM&H/U installed properly without being tilted? Is the bracket deformation-free? Are the VDCCM&H/U installation bolts installed without missing or getting loose?Go to step 2 .Repair the defective part. Go to step 2 . Install VDCCM&H/U properly. Replace the bracket if faulty. Tighten the VDCCM&H/U installation bolt. < Refer to VDC CONTROL MODULE AND HYDRAULIC CONTROL UNIT (VDCCM&H/U) , COMPONENT, General Description. >
2 CHECK STEERING WHEEL. Drive the vehicle on a flat road. Park the vehicle straight. Check the steering wheel for deviation from center.Is the deviation from the center of steering wheel less than 5°?Go to step 3 .Perform the centering adjustment of steering wheel, and perform Set up mode for Neutral of Steering Angle Sensor & Lateral G Sensor 0 point. Go to step 3. < Refer to SET UP MODE FOR NEUTRAL OF STEERING ANGLE SENSOR & LATERAL G SENSOR 0 POINT , ADJUSTMENT, VDC Control Module and Hydraulic Control Unit (VDCCM&H/U). >
3 CHECK OUTPUT OF STEERING ANGLE SENSOR USING SUBARU SELECT MONITOR. Adjust steering wheel to the center position. Connect Subaru Select Monitor, and select "Current Data Display & Save". Read the «Steer Angle Sensor Op» displayed on display.Is the indicated reading of the «Steer Angle Sensor Op» on the monitor display -10° - 10°?Go to step 4 .Check the installation of the steering wheel and steering angle sensor, and replace the parts if necessary.
4 CHECK OUTPUT OF SENSORS USING SUBARU SELECT MONITOR. Drive the vehicle on a flat road. Park the vehicle straight. Connect Subaru Select Monitor, and select "Current Data Display & Save". Read output of sensors displayed on display.Are the indicated reading of sensor outputs following values? Lateral G sensor Output: -2 - 2 m/s 2 Longitudinal G sensor output: -2 - 2 m/s 2 Yaw Rate Sensor Output: -4 - 4 deg/sGo to step 5 .Recheck from step 1, and if the problem is not solved, go to next. Go to step 8 .
5 SET 0 POINT FOR LONGITUDINAL G SENSOR USING SUBARU SELECT MONITOR. Select "Function Check Sequence" on Subaru Select Monitor. Perform Set up mode for Neutral of Steering Angle Sensor & Lateral G Sensor 0 point. < Refer to SET UP MODE FOR NEUTRAL OF STEERING ANGLE SENSOR & LATERAL G SENSOR 0 POINT , ADJUSTMENT, VDC Control Module and Hydraulic Control Unit (VDCCM&H/U). >Is the 0 point setting successful?Go to step 6 .Recheck from step 1, and when the 0 point setting is not possible, replace the VDCCM&H/U and steering angle sensor. < Refer to VDC CONTROL MODULE AND HYDRAULIC CONTROL UNIT (VDCCM&H/U) . > < Refer to STEERING ANGLE SENSOR . >
6 PERFORM DRIVING TEST. Drive approximately 10 minutes, and check if the warning lights illuminate or improperly operate during driving.Did the ABS warning light or VDC warning light remain off? Does ABS or VDC operate without malfunction?Go to step 7 .Recheck from step 1, and when the warning lights illuminate or improperly operate, replace the VDCCM&H/U. < Refer to VDC CONTROL MODULE AND HYDRAULIC CONTROL UNIT (VDCCM&H/U) . >
7 CHECK OUTPUT OF SENSORS USING SUBARU SELECT MONITOR. Park the vehicle on a level surface. Connect Subaru Select Monitor, and select "Current Data Display & Save". Read output of sensors displayed on display.Are the indicated reading of sensor outputs following values? Lateral G sensor Output: -1.5 - 1.5 m/s 2 Longitudinal G sensor output: -1.5 - 1.5 m/s 2 Yaw Rate Sensor Output: -4 - 4 deg/sIt results from a temporary noise interference.Replace the VDCCM&H/U. < Refer to VDC CONTROL MODULE AND HYDRAULIC CONTROL UNIT (VDCCM&H/U) . >
8 CHECK OUTPUT OF SENSORS USING SUBARU SELECT MONITOR. Remove the VDCCM&H/U installation bolt and bracket. Keep VDCCM&H/U in a horizontal position. Connect Subaru Select Monitor, and select "Current Data Display & Save". Read output of sensors displayed on display.When VDCCM&H/U is in a horizontal position, are the indicated reading of sensor outputs following values? Lateral G sensor Output: -1.5-1.5 m/s 2 Longitudinal G sensor output: -1.5 - 1.5 m/s 2 Yaw Rate Sensor Output: -4 - 4 deg/sCheck the bracket and brake pipe, and install VDCCM&H/U in a horizontal position to the vehicle.Replace the VDCCM&H/U. < Refer to VDC CONTROL MODULE AND HYDRAULIC CONTROL UNIT (VDCCM&H/U) . >

DIAGNOSTIC PROCEDURE

SymptomsMain probable causeOther probable cause
Poor brake performanceLong braking/stopping distanceVDCCM&H/U Brake pad Aeration to brake line Tire specifications, tire wear and air pressures Incorrect wiring or piping connectionsDefective ABS wheel speed sensor or sensor gap Defective steering angle sensor or improper neutral position Defective yaw rate & G sensor or improper installation of VDCCM&H/U. Master cylinder Brake caliper Disc rotor Brake pipe Brake booster
Wheel lockVDCCM&H/U Defective ABS wheel speed sensor or sensor gap Incorrect wiring or piping connectionsDefective steering angle sensor or improper neutral position Defective yaw rate & G sensor or improper installation of VDCCM&H/U. Brake caliper Brake pipe
Brake dragVDCCM&H/U Defective ABS wheel speed sensor or sensor gap Master cylinder Brake caliper Parking brake Axle and wheels Brake pedal playDefective steering angle sensor or improper neutral position Defective yaw rate & G sensor or improper installation of VDCCM&H/U. Brake pad Brake pipe
Long brake pedal strokeAeration to brake line Brake pedal playVDCCM&H/U Master cylinder Brake caliper Brake pad Brake pipe Brake booster
Vehicle vertical pitchingVDCCM&H/U Road surface (uneven) Suspension play or fatigue (reduced damping) Incorrect wiring or piping connectionsDefective ABS wheel speed sensor or sensor gap Defective steering angle sensor or improper neutral position Defective yaw rate & G sensor or improper installation of VDCCM&H/U.
Poor brake performanceUnstable or uneven brakingVDCCM&H/U Defective ABS wheel speed sensor or sensor gap Brake caliper Brake pad Road surface (uneven) Tire specifications, tire wear and air pressures Incorrect wiring or piping connectionsDefective ABS wheel speed sensor or sensor gap Defective steering angle sensor or improper neutral position Defective yaw rate & G sensor or improper installation of VDCCM&H/U. Master cylinder Disc rotor Brake pipe Axle and wheels Road with crowns or banks Suspension play or fatigue (reduced damping)
Vibration or noise When braking suddenly When accelerating suddenly While driving on a slippery roadExcessive brake pedal vibrationRoad surface (uneven) Incorrect wiring or piping connectionsVDCCM&H/U Brake booster Suspension play or fatigue (reduced damping)
Noise from VDCH/UVDCCM&H/U (mount bushing) Defective ABS wheel speed sensor or sensor gap Brake pipeVDCCM&H/U Defective steering angle sensor or improper neutral position Defective yaw rate & G sensor or improper installation of VDCCM&H/U.
Noise from the front side of vehicleVDCCM&H/U (mount bushing) Defective ABS wheel speed sensor or sensor gap Master cylinder Brake caliper Brake pad Disc rotor Brake pipe Brake booster Suspension play or fatigue (reduced damping)Axle and wheels Tire specifications, tire wear and air pressures
Noise from the rear side of vehicleDefective ABS wheel speed sensor or sensor gap Brake caliper Brake pad Disc rotor Parking brake Brake pipe Suspension play or fatigue (reduced damping)Axle and wheels Tire specifications, tire wear and air pressures
Engine does not accelerate or goes into a stall when accelerating suddenly or driving on a slippery surface.VDCCM&H/U Defective ABS wheel speed sensor or sensor gap Master cylinder Brake caliper Parking brake Incorrect wiring or pipingDefective steering angle sensor or improper neutral position Defective yaw rate & G sensor or improper installation of VDCCM&H/U. Brake pad Brake pipe
Poor change-direction-operation stability of TCSDeviation to right or left directionVDCCM&H/U Defective ABS wheel speed sensor or sensor gap Defective steering angle sensor or improper neutral position Defective yaw rate & G sensor or improper installation of VDCCM&H/U. Brake caliper Brake pad Wheel alignment Road surface (uneven) Road with crowns or banks Tire specifications, tire wear and air pressures Incorrect wiring or piping connectionsDisc rotor Brake pipe Axle and wheels Suspension play or fatigue (reduced damping)
Vehicle spinVDCCM&H/U Defective ABS wheel speed sensor or sensor gap Defective steering angle sensor or improper neutral position Defective yaw rate & G sensor or improper installation of VDCCM&H/U. Brake pad Tire specifications, tire wear and air pressures Incorrect wiring or piping connectionsBrake caliper Brake pipe
Steering wheel drag while drivingVDCCM&H/U Defective ABS wheel speed sensor or sensor gap Defective steering angle sensor or improper neutral position Defective yaw rate & G sensor or improper installation of VDCCM&H/U. Incorrect wiring or piping connections Power steering systemBrake caliper Brake pad Disc rotor Wheel alignment Road surface (uneven) Road with crowns or banks Suspension play or fatigue (reduced damping) Tire specifications, tire wear and air pressures
VDC operates while driving normally.VDCCM&H/U Defective ABS wheel speed sensor or sensor gap Defective steering angle sensor or improper neutral position Defective yaw rate & G sensor or improper installation of VDCCM&H/U. Wheel alignment Road surface (uneven) Road with crowns or banks Suspension play or fatigue (reduced damping) Tire specifications, tire wear and air pressures Incorrect wiring or piping connections Power steering system
VDC OFF indicator light does not illuminate when the VDC OFF switch is depressed. NOTE: When pressing VDC OFF switch for 10 seconds or more, VDC OFF indicator light goes off and cannot operate any more. When turning the ignition switch from OFF to ON, the previous status is restored.Harness Combination meter VDC OFF switch
NOTE
When pressing VDC OFF switch for 10 seconds or more, VDC OFF indicator light goes off and cannot operate any more. When turning the ignition switch from OFF to ON, the previous status is restored.

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