Diagnostic Procedure

DIAGNOSTIC PROCEDURE

Step	Check	Yes	No
1 CHECK BRAKE SWITCH SIGNAL (ECM). Turn the ignition switch to ON. Confirm the current data of stereo camera using Subaru Select Monitor. Display the data of brake switch to check it.	Is ON ← → OFF displayed on the display when the brake pedal is depressed or released?	Go to step 2 .	Go to step 3 .
2 CHECK BRAKE SWITCH SIGNAL (BODY INTEGRATED UNIT). Turn the ignition switch to ON. Connect the Subaru Select Monitor. Select {Integ. unit mode} from main menu. Select {Current Data Display & Save}, check the brake switch output.	Is ON ← → OFF displayed on the display when the brake pedal is depressed or released?	Go to step 6 .	Go to step 3 .
3 CHECK STOP LIGHT & BRAKE SWITCH. Check the stop light & brake switch. < Refer to INSPECTION , Stop Light Switch. >	Is the stop light & brake switch OK?	Go to step 4 .	Replace the stop light & brake switch. < Refer to REMOVAL , Stop Light Switch. >
4 CHECK BRAKE SWITCH CIRCUIT (BATTERY POWER SUPPLY CIRCUIT). Turn the ignition switch to OFF. Disconnect the harness connector from stop light & brake switch. Turn the ignition switch to ON. Measure the voltage between stop light & brake switch harness connector terminal and chassis ground. Connector & terminal (B65) No. 2 (+) - Chassis ground (-): (B65) No. 4 (+) - Chassis ground (-):	Is the voltage approx. 10 V or more?	Go to step 5 .	Check the power supply system circuit, and if any fault is found, repair or replace the defective parts.
5 CHECK BRAKE SWITCH CIRCUIT. Turn the ignition switch to OFF. Disconnect the ECM connector. Measure the resistance between ECM harness connector terminal and stop light & brake switch. Connector & terminal 2.5 L model (B137) No. 3 - (B65) No. 3: (B137) No. 7 - (B65) No. 1: 3.6 L model (B136) No. 3 - (B65) No. 3: (B136) No. 15 - (B65) No. 1:	Is the resistance less than 10 Ω?	Go to step 6 .	Repair or replace the harness.
6 CHECK STEREO CAMERA. Connect all connectors. Turn the ignition switch to ON. Connect the Subaru Select Monitor. Read the DTC.	Is another DTC (other than DTC B2813) displayed?	Perform the diagnosis according to DTC.	Go to step 7 .
7 CHECK CONNECTOR. Check the connectors of stop light & brake switch, ECM and stereo camera.	Is the connector normal?	Go to step 8 .	Repair or replace the connector.
8 CHECK LAN SYSTEM. Perform the diagnosis for LAN system. < Refer to BASIC DIAGNOSTIC PROCEDURE . >	Is a DTC of the LAN system detected?	Perform the diagnosis according to DTC for LAN system.	Go to step 9 .
9 CHECK STEREO CAMERA. Clear the memory. Read the DTC.	Is the same DTC (DTC B2813) displayed?	Replace the stereo camera. < Refer to REMOVAL , Stereo Camera. >	Temporary poor contact occurs.