DTC P0724 Brake Switch Circuit High: Wiring Diagram

Stop light system. See appropriate SYSTEM WIRING DIAGRAM article.

Fig 1: Stop Light System - Wiring Diagram (Brake Switch)

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Courtesy of SUBARU OF AMERICA, INC.

DIAGNOSTIC PROCEDURE

Step	Check	Yes	No
1 CHECK STOP LIGHT SWITCH. Turn the ignition switch to OFF. Disconnect the stop light switch connector. Measure the resistance of harness between stop light switch connectors. Connector & terminal (B65) No. 2 - No. 3:	Is the resistance 1 MΩ or more?	Go to step 2 .	Replace the stop light switch. Refer to STOP LIGHT SWITCH .
2 CHECK HARNESS. Disconnect the TCM connector. Turn the ignition switch to ON. Measure the voltage between TCM connector and chassis ground. Connector & terminal (B55) No. 13 (+) - Chassis ground (-):	Is the voltage 10 V or more?	Repair the short circuit of harness.	Go to step 3 .
3 CHECK INPUT SIGNAL FOR TCM. Connect the TCM and stop light switch connector. Turn the ignition switch to ON. Read the data of «Stop Light Switch» using Subaru Select Monitor.	Is "OFF" displayed?	Current condition is normal. Check for poor contact in connectors or harnesses, and repair the defective part.	Go to step 4 .
4 CHECK FOR POOR CONTACT.	Is there poor contact of input signal of stop light switch?	Repair the poor contact.	Check the TCM.