DTC P0719 Brake Switch Circuit Low: Wiring Diagram

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

Fig 1: Brake Switch Wiring Diagram (DTC P0719)

Courtesy of SUBARU OF AMERICA, INC.

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 TCM 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.
5 CHECK INPUT SIGNAL FOR TCM. With brake pedal depressed, read the data of "Stop lamp SW" using Subaru Select Monitor.	Is "ON" displayed?	Current condition is normal. Check for poor contact of the connector or harness, and repair the fault location.	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.