Brake Pedal Position Switch Signal Circuit Troubleshooting (2013-18)

Brake pedal position switch signal check 1:

- 1. Press the engine start/stop button to select the ON mode.

- 2. Check the parameter(s) below with the HDS.

Signal	Threshold	Current conditions
Values	Unit	Values	Unit
BRAKE SWITCH	OFF

Do the current condition(s) match the threshold?

YES

Go to step 2.

Inspect the brake pedal position switch .?

Brake pedal position switch signal check 2:

- 1. Press the brake pedal while checking the parameter(s) below with the HDS.

Signal	Threshold	Current conditions
Values	Unit	Values	Unit
BRAKE SWITCH	ON

Do the current condition(s) match the threshold?

YES

The brake pedal position switch signal circuit (BKSW line) is OK.?

Go to step 3.

Shorted wire check (STOP SW line):

- 1. Press the engine start/stop button to select the OFF mode.

- 2. Jump the SCS line with the HDS.

SCS Short

- 3. Disconnect the following connectors.

PCM connector A (49P) - Refer to: How to Troubleshoot the Fuel and Emissions Systems (2013-15), or How to Troubleshoot the A/T System (2013-15), or How to Troubleshoot the Fuel and Emissions Systems (2016-18), or How to Troubleshoot the A/T System (2016-18)

Brake pedal position switch 4P connector

- 4. Check for continuity between test points 1 and 2.

Test condition	OFF mode
	PCM connector A (49P): disconnected
	Brake pedal position switch 4P connector: disconnected
Test circuit	STOP SW
Test point 1	PCM connector A (49P) No. 8 (LT GRN)
Test point 2	Body ground

Courtesy of HONDA, U.S.A., INC.

Is there continuity?

YES

Repair a short in the STOP SW wire between the PCM (A8) and the No. A17 (10 A) fuse in the under-hood fuse/relay box. Also, replace the No. A17 (10 A) fuse.?

The STOP SW wire is not shorted. Go to step 4.

Open wire check (STOP SW line):

- 1. Connect terminals A and B with a jumper wire.

Terminal A	Brake pedal position switch 4P connector No. 1 (LT GRN)
Terminal B	Body ground

Courtesy of HONDA, U.S.A., INC.

- 2. Check for continuity between test points 1 and 2.

Test condition	OFF mode
	PCM connector A (49P): disconnected

	Brake pedal position switch 4P connector: disconnected
	Brake pedal position switch 4P connector terminal No. 1: jumped to body ground
Test circuit	STOP SW
Test point 1	PCM connector A (49P) No. 8 (LT GRN)
Test point 2	Body ground

Courtesy of HONDA, U.S.A., INC.

Is there continuity?

YES

The STOP SW wire is OK. Repair an open in the +B STOP wire between the brake pedal position switch and the No. A17 (10 A) fuse in the under-hood fuse/relay box. Inspect the brake pedal position switch .?

Repair an open in the STOP SW wire between the PCM (A8) and the brake pedal position switch.?