Diagnostic Procedure

DIAGNOSTIC PROCEDURE

Step	Check	Yes	No
1 CHECK VDCCM&H/U POWER 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. 34 (+) - 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. 11 - Chassis ground:	Is the resistance less than 10 Ω?	Go to step 3 .	Repair the VDCCM&H/U ground harness.
3 CHECK PRESSURE SENSOR. Connect the Subaru Select Monitor to the vehicle. Select "Current Data Display & Save" in the Subaru Select Monitor. < Refer to READ CURRENT DATA , OPERATION, Subaru Select Monitor. > Depress the brake pedal. Read the pressure sensor output using the Subaru Select Monitor.	Do the values on the monitor display change when the pedal is depressed?	Go to step 4 .	Replace the VDCCM&H/U. < Refer to VDC CONTROL MODULE AND HYDRAULIC CONTROL UNIT (VDCCM&H/U) . >
4 CHECK VDCCM&H/U. Connect all connectors. Clear the memory. < Refer to OPERATION , Clear Memory Mode. > Perform the Inspection Mode. < Refer to PROCEDURE , Inspection Mode. > Read the DTC. < Refer to OPERATION , Read Diagnostic Trouble Code (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.