DTC P0719 Brake Switch Circuit Low: Wiring Diagram

WARNING: This page is about a different variant/trim than selected.

Stop light system. See appropriate SYSTEM WIRING DIAGRAM article.

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

G08579097

Courtesy of SUBARU OF AMERICA, INC.

DIAGNOSTIC PROCEDURE

Step	Check	Yes	No
1 CHECK FUSE (NO. 8). Turn the ignition switch to OFF. Remove the fuse (No. 8).	Is the fuse (No. 8) blown out?	Replace the fuse (No. 8). If the new fuse (No. 8) has blown out easily, repair the short circuit of harness between fuse (No. 8) and stop light switch.	Go to step 2 .
2 CHECK HARNESS. Turn the ignition switch to OFF. Disconnect the TCM and stop light switch connector. Measure the resistance between TCM connector and stop light switch connector. Connector & terminal (B55) No. 13 - (B65) No. 3:	Is the resistance less than 1 Ω?	Go to step 3 .	Repair the open circuit of harness.
3 CHECK HARNESS. Measure the resistance between the stop light switch connector and fuse (No. 8). Connector & terminal (B65) No. 2 - fuse (No. 8):	Is the resistance less than 1 Ω?	Go to step 4 .	Repair the open circuit of harness.
4 CHECK INPUT SIGNAL FOR TCM. Install the fuse (No. 8). Connect the TCM and stop light switch connector. Depress the brake pedal. Measure the voltage between TCM connector and chassis ground. Connector & terminal (B55) No. 13 (+) - Chassis ground (-):	Is the voltage 10 V or more?	Go to step 5 .	Replace the stop light switch. Refer to STOP LIGHT SWITCH .
5 CHECK INPUT SIGNAL FOR TCM. With brake pedal depressed, read the data of «Stop Light Switch» using Subaru Select Monitor.	Is "ON" displayed?	Current condition is normal. Check for poor contact in connectors or harnesses, and repair the defective part.	Go to step 6 .
6 CHECK FOR POOR CONTACT.	Is there poor contact of input signal of stop light switch?	Repair the poor contact.	Check the TCM.