Home ReviewsRefund
Home/Subaru/Forester/Subaru Forester SJ (2012-2015)/Repair manual/Anti-Lock/traction Control/Vehicle Dynamics Control (Diagnostics): Wiring
Contents Wiring diagrams Section: Anti-Lock/traction Control All sections

Vehicle Dynamics Control (Diagnostics): Wiring Subaru Forester SJ

Anti-Lock/traction Control 13 illustrations ~424 words

WIRING DIAGRAM

Vehicle dynamics control system < Ref. to VEHICLE DYNAMICS CONTROL SYSTEM . >

Scheme 74

Scheme 74: WIRING DIAGRAM
Scheme 74: WIRING DIAGRAM
StepCheckYesNo
1 READ DTC. Read the DTC. < Ref. to READ DIAGNOSTIC TROUBLE CODE (DTC) . >Is DTC displayed?Perform the diagnosis according to DTC. < Ref. to LIST OF DIAGNOSTIC TROUBLE CODE (DTC) . >Go to step 2 .
2 CHECK VDC OFF SWITCH. Remove and check VDC OFF switch. < Ref. to VDC OFF SWITCH . >Is the VDC OFF switch normal?Go to step 3 .Replace the VDC OFF switch.
3 CHECK VDC OFF SWITCH CIRCUIT. Disconnect the connector from the VDCCM & H/U. Measure the resistance between VDCCM & H/U connector and chassis ground. Connector & terminal (B310) No. 37 - Chassis groundIs the resistance less than 10 ohms?Check the VDC OFF switch circuit.Go to step 4 .
4 CHECK LAN SYSTEM. Perform the diagnosis for LAN system. < Ref. to BASIC DIAGNOSTIC PROCEDURE . >Is there any fault in LAN system?Perform the diagnosis according to DTC for LAN system. < Ref. to LIST OF DIAGNOSTIC TROUBLE CODE (DTC) . >Go to step 5 .
5 CHECK COMBINATION METER. Check the combination meter. < Ref. to SELF-DIAGNOSIS DISPLAY MODE , OPERATION, Combination Meter System. >Is combination meter OK?Replace the VDC Control Module only. < Ref. to REPLACEMENT , VDC Control Module and Hydraulic Control Unit (VDCCM & H/U). >Replace the combination meter. < Ref. to REMOVAL , Combination Meter. >

Parking brake/brake fluid level warning light system < Ref. to PARKING BRAKE/BRAKE FLUID LEVEL WARNING LIGHT SYSTEM . >

Scheme 75

Scheme 75: WIRING DIAGRAM
Scheme 75: WIRING DIAGRAM
StepCheckYesNo
1 CHECK INSTALLATION OF VDCCM & H/U CONNECTOR. Turn the ignition switch to OFF. Check that the VDCCM & H/U connector is inserted until it is locked by clamp.Is the connector firmly inserted?Go to step 2 .Insert the VDCCM & H/U connector until it is locked by clamp.
2 READ DTC. Read the DTC. < Ref. to READ DIAGNOSTIC TROUBLE CODE (DTC) . >Is DTC displayed?Perform the diagnosis according to DTC. < Ref. to LIST OF DIAGNOSTIC TROUBLE CODE (DTC) . >Go to step 3 .
3 CHECK BRAKE FLUID AMOUNT. Check the amount of brake fluid in the reservoir tank of master cylinder.Does the level of the brake fluid amount fall between the lines of "MAX" and "MIN"?Go to step 4 .Replenish brake fluid to the specified value.
4 CHECK BRAKE FLUID LEVEL SWITCH. Turn the ignition switch to OFF. Disconnect the level switch connector (B16) from master cylinder. Measure the resistance of master cylinder terminals. Terminals No. 1 - No. 2Is the resistance 1 Mohms or more?Go to step 5 .Replace the master cylinder. < Ref. to MASTER CYLINDER . >
5 CHECK GROUND SHORT OF HARNESS. Disconnect the connector (i10) from combination meter. Measure the resistance between combination meter connector and chassis ground. Connector & terminal (i10) No. 23 - Chassis groundIs the resistance 1 Mohms or more?Go to step 6 .Repair the harness between combination meter and brake fluid level switch.
6 CHECK PARKING BRAKE SWITCH. Disconnect the connector (R4) from parking brake switch. Release the parking brake. Measure the resistance between parking brake switch terminal and chassis ground.Is the resistance 1 Mohms or more?Go to step 7 .Replace the parking brake switch.
7 CHECK GROUND SHORT OF HARNESS. Disconnect the connector (i84) from body integrated unit. Measure the resistance between body integrated unit connector and chassis ground. Connector & terminal (i84) No. 32 - Chassis groundIs the resistance 1 Mohms or more?Go to step 8 .Repair the harness between body integrated unit and parking brake switch.
8 CHECK POOR CONTACT OF CONNECTOR. Check for poor contact of all connectors.Is there poor contact?Repair the connector.Go to step 9 .
9 CHECK LAN SYSTEM. Perform the diagnosis for LAN system. < Ref. to BASIC DIAGNOSTIC PROCEDURE . >Is there any fault in LAN system?Perform the diagnosis according to DTC for LAN system. < Ref. to LIST OF DIAGNOSTIC TROUBLE CODE (DTC) . >Go to step 10 .
10 CHECK COMBINATION METER. Check the combination meter. < Ref. to SELF-DIAGNOSIS DISPLAY MODE , OPERATION, Combination Meter System. >Is combination meter OK?Replace the VDC Control Module only. < Ref. to REPLACEMENT , VDC Control Module and Hydraulic Control Unit (VDCCM & H/U). >Replace the combination meter. < Ref. to COMBINATION METER . >

Vehicle dynamics control system < Ref. to VEHICLE DYNAMICS CONTROL SYSTEM . >

Scheme 76

Scheme 76: WIRING DIAGRAM
Scheme 76: WIRING DIAGRAM
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 C1211 (B310) No. 29 - (B6) No. 1: (B310) No. 17 - (B6) No. 2: DTC C1221 (B310) No. 8 - (B15) No. 1: (B310) No. 20 - (B15) No. 2: DTC C1231 (B310) No. 5 - (R72) No. 1: (B310) No. 18 - (R72) No. 2: DTC C1241 (B310) No. 19 - (R73) No. 1: (B310) No. 7 - (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 C1211 (B310) No. 29 - Chassis ground: DTC C1221 (B310) No. 8 - Chassis ground: DTC C1231 (B310) No. 5 - Chassis ground: DTC C1241 (B310) No. 19 - 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. Connect the ABS wheel speed sensor connector. Turn the ignition switch to ON. Measure the voltage between ABS wheel speed sensor connector and chassis ground. Connector & terminal DTC C1211 (B6) No. 2 (+) - Chassis ground (-): DTC C1221 (B15) No. 2 (+) - Chassis ground (-): DTC C1231 (R72) No. 2 (+) - Chassis ground (-): DTC C1241 (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. 4 (+) - (B310) No. 14 (-): (B310) No. 1 (+) - (B310) No. 14 (-): (B310) No. 26 (+) - (B310) No. 14 (-)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. < Ref. to CHECK ABS WHEEL SPEED SENSOR UNIT , INSPECTION, Front ABS Wheel Speed Sensor. >Is the pattern the same waveform as shown in the figure?Go to step 7 .Replace the ABS wheel speed sensor. < Ref. to FRONT ABS WHEEL SPEED SENSOR . >
7 CHECK VDCCM & H/U. Connect all connectors. Clear the memory. < Ref. to CLEAR MEMORY MODE . > Perform the Inspection Mode. < Ref. to INSPECTION MODE . > Read the DTC.Is the same DTC displayed?Replace the VDC Control Module only. < Ref. to REPLACEMENT , 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. < Ref. to LIST OF DIAGNOSTIC TROUBLE CODE (DTC) . >It results from a temporary noise interference.

DTC PROCEDURE

Vehicle dynamics control system < Ref. to VEHICLE DYNAMICS CONTROL SYSTEM . >

Scheme 77

Scheme 77: WIRING DIAGRAM
Scheme 77: WIRING DIAGRAM
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. 4 (+) - (B310) No. 14 (-): (B310) No. 1 (+) - (B310) No. 14 (-): (B310) No. 26 (+) - (B310) No. 14 (-)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. 14 - 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. < Ref. to CLEAR MEMORY MODE . > Perform the Inspection Mode. < Ref. to INSPECTION MODE . > Read the DTC.Is the same DTC displayed?Replace the VDCCM & H/U. < Ref. 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. < Ref. to LIST OF DIAGNOSTIC TROUBLE CODE (DTC) . >Temporary poor contact occurs.

DTC PROCEDURE

Vehicle dynamics control system < Ref. to VEHICLE DYNAMICS CONTROL SYSTEM . >

Scheme 78

Scheme 78: WIRING DIAGRAM
Scheme 78: WIRING DIAGRAM
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. 14 - 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 VDC Control Module?Install the noise sources apart from sensor harness and VDC Control Module.Go to step 5 .
5 CHECK VDCCM & H/U. Connect all connectors. Clear the memory. < Ref. to CLEAR MEMORY MODE . > Perform the Inspection Mode. < Ref. to INSPECTION MODE . > Read the DTC.Is the same DTC displayed?Replace the VDC Control Module only. < Ref. to REPLACEMENT , 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. < Ref. to LIST OF DIAGNOSTIC TROUBLE CODE (DTC) . >Temporary poor contact occurs.

DTC PROCEDURE

Vehicle dynamics control system < Ref. to VEHICLE DYNAMICS CONTROL SYSTEM . >

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, rear defogger, etc. which produce an electrical load. Measure the voltage between VDCCM & H/U connector and chassis ground. Connector & terminal (B310) No. 4 (+) - (B310) No. 14 (-): (B310) No. 1 (+) - (B310) No. 14 (-): (B310) No. 26 (+) - (B310) No. 14 (-)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. 14 - 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. < Ref. to CLEAR MEMORY MODE . > Perform the Inspection Mode. < Ref. to INSPECTION MODE . > Read the DTC.Is the same DTC displayed?Replace the VDC Control Module only. < Ref. to REPLACEMENT , 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. < Ref. to LIST OF DIAGNOSTIC TROUBLE CODE (DTC) . >Temporary poor contact occurs.

DTC PROCEDURE

Vehicle dynamics control system < Ref. to VEHICLE DYNAMICS CONTROL SYSTEM . >

Scheme 79

Scheme 79: WIRING DIAGRAM
Scheme 79: WIRING DIAGRAM
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. 1 (+) - Chassis ground (-): (B310) No. 4 (+) - 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. 1 (+) - Chassis ground (-): (B310) No. 4 (+) - 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 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. 14 - Chassis groundIs the resistance less than 10 ohms?Go to step 4 .Repair the VDCCM & H/U ground harness.
4 CHECK POOR CONTACT OF CONNECTORS.Is there poor contact of connector between generator, battery and VDCCM & H/U?Repair the connector.Go to step 5 .
5 CHECK VDCCM & H/U. Connect all connectors. Clear the memory. < Ref. to CLEAR MEMORY MODE . > Perform the Inspection Mode. < Ref. to INSPECTION MODE . > Read the DTC.Is the same DTC displayed?Replace the VDC Control Module only. < Ref. to REPLACEMENT , 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. < Ref. to LIST OF DIAGNOSTIC TROUBLE CODE (DTC) . >Temporary poor contact occurs.

DTC PROCEDURE

Vehicle dynamics control system < Ref. to VEHICLE DYNAMICS CONTROL SYSTEM . >

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. 4 (+) - Chassis ground (-): (B310) No. 26 (+) - 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. 4 (+) - Chassis ground (-): (B310) No. 26 (+) - 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. 14 - Chassis ground: (B310) No. 38 - 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 terminals. Terminals No. 26 - No. 38Is the resistance 1 Mohms or more?Go to step 6 .Replace the VDCCM & H/U. < Ref. 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. < Ref. to CLEAR MEMORY MODE . > Perform the Inspection Mode. < Ref. to INSPECTION MODE . > Read the DTC.Is the same DTC displayed?Replace the VDCCM & H/U. < Ref. 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. < Ref. 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 may remain lit at this point, this is normal. Drive the vehicle at 40 km/h (25 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 may remain lit at this point, this is normal. Drive the vehicle at 40 km/h (25 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.

DTC PROCEDURE

Stop light system < Ref. to EXTERIOR LIGHTS , NON-TURBO MODEL (WITHOUT EyeSight AND X MODE), WIRING DIAGRAM, Stop Light System. >

Scheme 80

Scheme 80: WIRING DIAGRAM
Scheme 80: WIRING DIAGRAM
StepCheckYesNo
1 CHECK STOP LIGHT SWITCH. Check the stop light switch. < Ref. to INSTALLATION , Stop Light Switch. >Is the installation position of the stop light switch correct?Go to step 2 .Adjust the installation position of the stop light switch. < Ref. to INSTALLATION , Stop Light Switch. >
2 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. 3 - No. 4Is the resistance 1 ohms or less when the stop light switch is ON (when pedal is depressed)?Go to step 3 .Replace the stop light switch. < Ref. to STOP LIGHT SWITCH . >
3 CHECK STOP LIGHT POWER SUPPLY. Measure the voltage between stop light switch terminal and chassis ground. Connector & terminal (B65) No. 3 (+) - Chassis ground (-)Is the voltage 10 - 15 V?Go to step 4 .Repair the stop light power supply circuit.
4 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. 4 - (B310) No. 6Is the resistance less than 1 ohms?Go to step 5 .Repair the stop light switch circuit.
5 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 6 .
6 CHECK VDCCM & H/U. Connect all connectors. Clear the memory. < Ref. to CLEAR MEMORY MODE . > Perform the Inspection Mode. < Ref. to INSPECTION MODE . > Read the DTC.Is the same DTC displayed?Replace the VDC Control Module only. < Ref. to REPLACEMENT , 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. < Ref. to LIST OF DIAGNOSTIC TROUBLE CODE (DTC) . >Temporary poor contact occurs.

DTC PROCEDURE

Stop light system < Ref. to EXTERIOR LIGHTS , EXCEPT FOR NON-TURBO MODEL (WITHOUT EyeSight AND X MODE), WIRING DIAGRAM, Stop Light System. >

Scheme 81

Scheme 81: WIRING DIAGRAM
Scheme 81: WIRING DIAGRAM
StepCheckYesNo
1 CHECK STOP LIGHT. Turn the ignition switch to OFF. Disconnect the ground cable from battery. Remove the stop lights.Are the stop lights OK?Go to step 2 .Replace the stop lights.
2 CHECK STOP LIGHT SWITCH. Check the stop light switch. < Ref. to INSTALLATION , Stop Light Switch. >Is the installation position of the stop light switch correct?Go to step 3 .Adjust the installation position of the stop light switch. < Ref. to INSTALLATION , Stop Light Switch. >
3 CHECK STOP LIGHT SWITCH. Disconnect the stop light switch connector. Measure the resistance of stop light switch terminals. Connector & terminal (B65) No. 3 - No. 4Is the resistance less than 1 ohms when the stop light switch is ON (when pedal is depressed)?Go to step 4 .Replace the stop light switch. < Ref. to STOP LIGHT SWITCH . >
4 CHECK BRAKE LIGHT RELAY. Measure the resistance between brake light relay terminals. Connector & terminal (B564) No. 10 - No. 13Is the resistance less than 1 ohms?Go to step 5 .Replace the brake light relay.
5 CHECK VDCCM & H/U CONNECTOR. Disconnect the connector from the VDCCM & H/U.Is there poor contact or damage of the VDCCM & H/U connector?Repair the VDCCM & H/U connector.Go to step 6 .
6 CHECK STOP LIGHT SWITCH CIRCUIT. Measure the resistance of stop light switch circuit. Connector & terminal (B310) No. 6 - (B564) No. 13: (B65) No. 4 - (B564) No. 10: (B65) No. 3 - (F/B fuse) No. 8Is the resistance less than 1 ohms?Go to step 7 .Repair the stop light switch circuit.
7 CHECK STOP LIGHT SWITCH CIRCUIT. Connect all connectors. Connect the ground cable to battery. Turn the ignition switch to ON. Measure the voltage between brake light relay and chassis ground. Connector & terminal (B564) No. 13 (+) - Chassis ground (-)Is the voltage 10 V or more when the stop light switch is ON (when pedal is depressed)?Go to step 8 .Repair the stop light switch circuit.
8 CHECK VDCCM & H/U. Clear the memory. < Ref. to CLEAR MEMORY MODE . > Perform the Inspection Mode. < Ref. to INSPECTION MODE . > Read the DTC.Is the same DTC displayed?Replace the VDC Control Module only. < Ref. to REPLACEMENT , VDC Control Module and Hydraulic Control Unit (VDCCM & H/U). >Go to step 9 .
9 CHECK OTHER DTC DETECTION.Is any other DTC displayed?Perform the diagnosis according to DTC. < Ref. to LIST OF DIAGNOSTIC TROUBLE CODE (DTC) . >Temporary poor contact occurs.

Stop light system < Ref. to EXTERIOR LIGHTS , NON-TURBO MODEL (WITHOUT EyeSight AND X MODE), WIRING DIAGRAM, Stop Light System. >

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. 3 - No. 4Is the resistance 1 Mohms or more when stop light switch is OFF (when pedal is not depressed)?Go to step 2 .Replace the stop light switch. < Ref. 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. 6 - 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. < Ref. to CLEAR MEMORY MODE . > Perform the Inspection Mode. < Ref. to INSPECTION MODE . > Read the DTC.Is the same DTC displayed?Replace the VDC Control Module only. < Ref. to REPLACEMENT , 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. < Ref. to LIST OF DIAGNOSTIC TROUBLE CODE (DTC) . >Temporary poor contact occurs.

DTC PROCEDURE

Stop light system < Ref. to EXTERIOR LIGHTS , EXCEPT FOR NON-TURBO MODEL (WITHOUT EyeSight AND X MODE), WIRING DIAGRAM, Stop Light System. >

StepCheckYesNo
1 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 2 .
2 CHECK BRAKE LIGHT RELAY. Turn the ignition switch to OFF. Disconnect the ground cable from battery. Measure the resistance between brake light relay terminals. Connector & terminal (B564) No. 12 - No. 13Is the resistance less than 1 ohms?Replace the brake light relay.Go to step 3 .
3 CHECK VDCCM & H/U CONNECTOR. Disconnect the connector from the VDCCM & H/U.Is there poor contact or damage of the VDCCM & H/U connector?Repair the VDCCM & H/U connector.Go to step 4 .
4 CHECK STOP LIGHT SWITCH CIRCUIT. Connect the ground cable to battery. Turn the ignition switch to ON. Measure the voltage between stop light switch and chassis ground. Connector & terminal (B564) No. 13 (+) - Chassis ground (-)Is the voltage 10 V or more when the stop light switch is OFF (when pedal is not depressed)?Repair the stop light switch circuit.Go to step 5 .
5 CHECK VDCCM & H/U. Connect all connectors. Clear the memory. < Ref. to CLEAR MEMORY MODE . > Perform the Inspection Mode. < Ref. to INSPECTION MODE . > Read the DTC.Is the same DTC displayed?Replace the VDC Control Module only. < Ref. to REPLACEMENT , 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. < Ref. to LIST OF DIAGNOSTIC TROUBLE CODE (DTC) . >Temporary poor contact occurs.

Engine electrical system < Ref. to NON-TURBO MODEL (WITHOUT PUSH BUTTON START) , WIRING DIAGRAM, Engine Electrical System. >

CAN communication system < Ref. to NON-TURBO MODEL , WIRING DIAGRAM, CAN Communication System. >

Scheme 82

Scheme 82: WIRING DIAGRAM
Scheme 82: WIRING DIAGRAM
StepCheckYesNo
1 CHECK LAN SYSTEM. Perform the diagnosis for LAN system. < Ref. to BASIC DIAGNOSTIC PROCEDURE . >Is there any fault in LAN system?Perform the diagnosis according to DTC for LAN system. < Ref. to LIST OF DIAGNOSTIC TROUBLE CODE (DTC) . >Go to step 2 .
2 CHECK CLUTCH SIGNAL USING SUBARU SELECT MONITOR. Select "Current Data Display & Save" on the Subaru Select Monitor. < Ref. to READ CURRENT DATA , OPERATION, Subaru Select Monitor. > Read the «Clutch Switch» displayed on display.Is "OFF" displayed when the clutch pedal is not depressed, and is "ON" displayed when depressed?Go to step 5 .Go to step 3 .
3 CHECK CLUTCH SIGNAL OF ECM USING SUBARU SELECT MONITOR. Select "Current Data Display & Save" on Subaru Select Monitor. < Ref. to DISPLAY OF ENGINE FREEZE FRAME DATA , OPERATION, Subaru Select Monitor. > Read the «Clutch Switch» displayed on display.Is "OFF" displayed when the clutch pedal is not depressed, and is "ON" displayed when depressed?Go to step 5 .Go to step 4 .
4 CHECK HARNESS BETWEEN ECM AND CLUTCH SWITCH. Turn the ignition switch to OFF. Disconnect the connectors from ECM and clutch switch. Measure the resistance of harness between ECM and clutch switch connector. Connector & terminal (B137) No. 15 - (B107) No. 2Is the resistance less than 1 ohms?Repair the power supply circuit of clutch switch. Or replace the clutch switch. < Ref. to CLUTCH SWITCH . >Repair the harness between ECM and clutch switch connector.
5 CHECK VDCCM & H/U. Connect all connectors. Clear the memory. < Ref. to CLEAR MEMORY MODE . > Perform the Inspection Mode. < Ref. to INSPECTION MODE . > Read the DTC.Is the same DTC displayed?Replace the VDC Control Module only. < Ref. to REPLACEMENT , 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. < Ref. to LIST OF DIAGNOSTIC TROUBLE CODE (DTC) . >Temporary poor contact occurs.

DTC PROCEDURE

Back-up light system < Ref. to NON-TURBO MODEL , WIRING DIAGRAM, Back-up Light System. > CAN communication system < Ref. to NON-TURBO MODEL , WIRING DIAGRAM, CAN Communication System. >

Scheme 83

Scheme 83: WIRING DIAGRAM
Scheme 83: WIRING DIAGRAM
StepCheckYesNo
1 CHECK LAN SYSTEM. Perform the diagnosis for LAN system. < Ref. to BASIC DIAGNOSTIC PROCEDURE . >Is there any fault in LAN system?Perform the diagnosis according to DTC for LAN system. < Ref. to LIST OF DIAGNOSTIC TROUBLE CODE (DTC) . >Go to step 2 .
2 CHECK REVERSE SIGNAL USING SUBARU SELECT MONITOR. Select "Current Data Display & Save" on the Subaru Select Monitor. < Ref. to READ CURRENT DATA , OPERATION, Subaru Select Monitor. > Read the «Reverse Signal» displayed on display.Is "OFF" displayed when the shift lever is placed in any position other than reverse, and is "ON" displayed in reverse position?Go to step 5 .Go to step 3 .
3 CHECK BACK-UP LIGHT ILLUMINATION. Turn the ignition switch to ON. Place the shift lever in reverse position.Does the back-up light illuminate?Go to step 4 .Repair the back-up light circuit.
4 CHECK HARNESS BETWEEN BODY INTEGRATED UNIT AND BACK-UP LIGHT SWITCH. Turn the ignition switch to OFF. Disconnect the connectors from body integrated unit and back-up light switch. Measure the resistance of harness between body integrated unit and back-up light switch connector. Connector & terminal (B281) No. 12 - (B24) No. 1Is the resistance less than 1 ohms?Replace the backup light switch. < Ref. to SWITCHES AND HARNESS . >Repair the harness between body integrated unit and back-up light switch connector.
5 CHECK VDCCM & H/U. Connect all connectors. Clear the memory. < Ref. to CLEAR MEMORY MODE . > Perform the Inspection Mode. < Ref. to INSPECTION MODE . > Read the DTC.Is the same DTC displayed?Replace the VDC Control Module only. < Ref. to REPLACEMENT , 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. < Ref. to LIST OF DIAGNOSTIC TROUBLE CODE (DTC) . >Temporary poor contact occurs.

DTC PROCEDURE

Stop light system < Ref. to EXTERIOR LIGHTS , EXCEPT FOR NON-TURBO MODEL (WITHOUT EyeSight AND X MODE), WIRING DIAGRAM, Stop Light System. >

StepCheckYesNo
1 CHECK DTC. Check the DTC using Subaru Select Monitor.Are any DTCs related to the stop light switch displayed?Perform the diagnosis according to DTC. < Ref. to LIST OF DIAGNOSTIC TROUBLE CODE (DTC) . >Go to step 2 .
2 CHECK BRAKE LIGHT RELAY. Turn the ignition switch to OFF. Disconnect the ground cable from battery. Remove the brake light relay. Measure the resistance between brake light relay terminals (B564) No. 9 - (B564) No. 11 when the battery voltage is applied. Connector & terminal (B564) No. 12 - No. 13Is the resistance less than 1 ohms?Go to step 3 .Replace the brake light relay.
3 CHECK VDCCM & H/U CONNECTOR. Disconnect the connector from the VDCCM & H/U.Is there poor contact or damage of the VDCCM & H/U connector?Repair the VDCCM & H/U connector.Go to step 4 .
4 CHECK STOP LIGHT SWITCH CIRCUIT. Measure the resistance between brake light relay and the fuse. Connector & terminal (B564) No. 12 - (F/B fuse) No. 8Is the resistance less than 1 ohms?Go to step 5 .Repair the stop light switch circuit.
5 CHECK STOP LIGHT SWITCH CIRCUIT. Connect all connectors. Connect the ground cable to battery. Turn the ignition switch to ON. Measure the voltage between brake light relay and chassis ground. Connector & terminal (B564) No. 12 (+) - Chassis ground (-)Is the voltage 10 V or more?Go to step 6 .Repair the stop light switch circuit.
6 CHECK BRAKE LIGHT RELAY CIRCUIT. Turn the ignition switch to OFF. Remove the brake light relay. Turn the ignition switch to ON. Measure the voltage between brake light relay and chassis ground. Connector & terminal (B564) No. 9 (+) - Chassis ground (-)Is the voltage 10 V or more?Repair the faulty brake light circuit.Go to step 7 .
7 CHECK VDCCM & H/U. Turn the ignition switch to OFF. Connect all connectors and relays. Clear the memory. < Ref. to CLEAR MEMORY MODE . > Read the DTC.Is the same DTC displayed?Replace the VDC Control Module only. < Ref. to REPLACEMENT , 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. < Ref. to LIST OF DIAGNOSTIC TROUBLE CODE (DTC) . >Temporary poor contact occurs.

DTC PROCEDURE

Stop light system < Ref. to EXTERIOR LIGHTS , EXCEPT FOR NON-TURBO MODEL (WITHOUT EyeSight AND X MODE), WIRING DIAGRAM, Stop Light System. >

StepCheckYesNo
1 CHECK FUSE. Turn the ignition switch to OFF. Disconnect the ground cable from battery. Check the fuse (No. 33).Is the fuse blown out?Replace the fuse (No. 33).Go to step 2 .
2 CHECK BRAKE LIGHT RELAY. Measure the resistance between brake light relay terminals. Connector & terminal (B564) No. 9 - No. 11Is the resistance less than 1 ohms?Go to step 3 .Replace the brake light relay.
3 CHECK VDCCM & H/U CONNECTOR. Disconnect the connector from the VDCCM & H/U.Is there poor contact or damage of the VDCCM & H/U connector?Repair the VDCCM & H/U connector.Go to step 4 .
4 CHECK BRAKE LIGHT RELAY CIRCUIT. Measure the resistance between the brake light relay and VDCCM & H/U connector. Connector & terminal (B564) No. 9 - (B310) No. 28: (B564) No. 11 - (F/B fuse) No. 33Is the resistance less than 1 ohms?Go to step 5 .Repair the faulty brake light circuit.
5 CHECK BRAKE LIGHT RELAY CIRCUIT. Connect all connectors. Connect the ground cable to battery. Turn the ignition switch to ON. Measure the voltage between brake light relay and chassis ground. Connector & terminal (B564) No. 11 (+) - Chassis ground (-)Is the voltage 10 V or more?Go to step 6 .Repair the faulty brake light circuit.
6 CHECK VDCCM & H/U. Clear the memory. < Ref. to CLEAR MEMORY MODE . > Read the DTC.Is the same DTC displayed?Replace the VDC Control Module only. < Ref. to REPLACEMENT , 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. < Ref. to LIST OF DIAGNOSTIC TROUBLE CODE (DTC) . >Temporary poor contact occurs.

DTC PROCEDURE

Vehicle dynamics control system < Ref. to VEHICLE DYNAMICS CONTROL SYSTEM . >

Scheme 84

Scheme 84: WIRING DIAGRAM
Scheme 84: WIRING DIAGRAM
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. 15: (B231) No. 3 - (B310) No. 2Is 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 10 ohms 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 the VDC sensor midpoint setting mode. < Ref. to VDC SENSOR MIDPOINT SETTING MODE , 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 «Steering Angle Sensor» displayed on display.Is the indicated reading of the «Steering Angle Sensor» on the monitor display -10° - 10°?Perform the VDC sensor midpoint setting mode. Go to step 7 . < Ref. to VDC SENSOR MIDPOINT SETTING MODE , 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. < Ref. to CLEAR MEMORY MODE . > Perform the Inspection Mode. < Ref. 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. < Ref. to STEERING ANGLE SENSOR . > Clear the memory. < Ref. to CLEAR MEMORY MODE . > Perform the Inspection Mode. < Ref. to INSPECTION MODE . > Read the DTC.Is the same DTC displayed?Replace the VDC Control Module only. < Ref. to REPLACEMENT , 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. < Ref. to LIST OF DIAGNOSTIC TROUBLE CODE (DTC) . >Temporary poor contact occurs.
10 CHECK OTHER DTC DETECTION.Is any other DTC displayed?Perform the diagnosis according to DTC. < Ref. to LIST OF DIAGNOSTIC TROUBLE CODE (DTC) . >Original steering angle sensor malfunction

DTC PROCEDURE

  1. Non-turbo model

Vehicle dynamics control system < Ref. to NON-TURBO MODEL , WIRING DIAGRAM, Vehicle Dynamics Control System. >

Scheme 85

Scheme 85
Scheme 85
  1. Turbo model

Vehicle dynamics control system < Ref. to TURBO MODEL , WIRING DIAGRAM, Vehicle Dynamics Control System. >

Scheme 86

Scheme 86
Scheme 86
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 YAW RATE & G SENSOR INSTALLATION.Is the yaw rate & G sensor installation bolt tightened to 7.5 N.m (0.76 kgf-m, 5.5 ft-lb)?Go to step 3 .Tighten the yaw rate & G sensor installation bolt.
3 CHECK POWER SUPPLY OF YAW RATE & G SENSOR. Turn the ignition switch to OFF. Disconnect the connector from yaw rate & G sensor. Turn the ignition switch to ON. Measure the voltage between yaw rate & G sensor and chassis ground. Connector & terminal (B230) No. 1 (+) - Chassis ground (-)Is the voltage 10 - 15 V?Go to step 4 .Repair the yaw rate & G sensor power supply circuit.
4 CHECK YAW RATE & G SENSOR GROUND CIRCUIT. Measure the resistance between yaw rate & G sensor and chassis ground. Connector & terminal (B230) No. 4 - Chassis groundIs the resistance less than 10 ohms?Go to step 5 .Repair the yaw rate & G sensor ground circuit.
5 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. < Ref. to READ CURRENT DATA , OPERATION, Subaru Select Monitor. > Read the «Yaw Rate Sensor» displayed on display.Is the reading indicated on monitor display -4 - 4 deg/s?Go to step 6 .Replace the yaw rate & G sensor. < Ref. to YAW RATE AND G SENSOR . >
6 CHECK YAW RATE & G SENSOR. Turn the ignition switch to OFF. Connect all connectors. Clear the memory. < Ref. to CLEAR MEMORY MODE . > Perform the Inspection Mode. < Ref. to INSPECTION MODE . > Read the DTC.Is the same DTC displayed?Go to step 7 .Go to step 8 .
7 CHECK VDCCM & H/U. Turn the ignition switch to OFF. Replace the yaw rate & G sensor. < Ref. to YAW RATE AND G SENSOR . > Clear the memory. < Ref. to CLEAR MEMORY MODE . > Perform the Inspection Mode. < Ref. to INSPECTION MODE . > Read the DTC.Is the same DTC displayed?Replace the VDC Control Module only. < Ref. to REPLACEMENT , VDC Control Module and Hydraulic Control Unit (VDCCM & H/U). >Go to step 9 .
8 CHECK OTHER DTC DETECTION.Is any other DTC displayed?Perform the diagnosis according to DTC. < Ref. to LIST OF DIAGNOSTIC TROUBLE CODE (DTC) . >Temporary poor contact occurs.
9 CHECK OTHER DTC DETECTION.Is any other DTC displayed?Perform the diagnosis according to DTC. < Ref. to LIST OF DIAGNOSTIC TROUBLE CODE (DTC) . >Malfunction is found in original yaw rate & G sensor.

More articles — Vehicle Dynamics Control (Diagnostics)